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79-516: Through the early 21st century, the three aqueduct systems that supply water to the city utilized chlorination technology, but not filtration (unlike other large municipal water systems in the US). The water in the Croton Aqueduct system , the oldest of the three, often had high turbidity levels, which limits the effectiveness of chlorination as a disinfection process. The turbidity problems in

158-551: A firestorm which spread from the Hauptbahnhof (main railway station) and quickly moved south-east, completely destroying entire boroughs such as Hammerbrook , Billbrook and Hamm South . Thousands of people perished in these densely populated working class boroughs. The raids, codenamed Operation Gomorrah by the RAF , killed at least 42,600 civilians; the precise number is not known. About one million civilians were evacuated in

237-481: A halogen , chlorine is a highly efficient disinfectant, and is added to public water supplies to kill disease-causing pathogens, such as bacteria , viruses , and protozoans , that commonly grow in water supply reservoirs, on the walls of water mains and in storage tanks. The microscopic agents of many diseases such as cholera , typhoid fever , and dysentery killed countless people annually before disinfection methods were employed routinely. By far most chlorine

316-578: A 110 km (68 mi) estuary to the North Sea , on the mouth of the Alster and Bille . Hamburg is one of Germany's three city-states alongside Berlin and Bremen , and is surrounded by Schleswig-Holstein to the north and Lower Saxony to the south. The Port of Hamburg is Germany's largest and Europe's third-largest , after Rotterdam and Antwerp . The local dialect is a variant of Low Saxon . The official name reflects Hamburg's history as

395-538: A chlorine-generating filter that electrolyzes common salt . Pools chlorinated by this method generally have lower levels of chlorine than directly chlorinated pools. Such pools are called saltwater pools. Disinfection by chlorination can be problematic in some circumstances. Chlorine can react with naturally occurring organic compounds found in the water supply to produce compounds known as disinfection by-products (DBPs). The most common DBPs are trihalomethanes (THMs) and haloacetic acids (HAAs). Trihalomethanes are

474-633: A contract between Henry III and Hamburg's traders allowed them to establish a hanse in London. This was the first time in history that the word hanse was used for the trading guild of the Hanseatic League . In 1270, the solicitor of the senate of Hamburg , Jordan von Boitzenburg , wrote the first description of civil, criminal and procedural law for a city in Germany in the German language,

553-639: A district in Hamburg called the Portugiesenviertel  [ de ] (Portuguese quarter) where many Portuguese people settled and which has a variety of Portuguese restaurants, cafes and shops that attract many tourists. There are several statues, squares and streets in Hamburg that are named after Portuguese historical figures. These include the Vasco da Gama statue on the Kornhaus bridge, which

632-563: A figure of about 143,200 Muslim migrants in Hamburg, making up 8.4% percent of the population. As of 2021 , there were more than 50 mosques in the city, including the Ahmadiyya run Fazle Omar Mosque , which is the oldest in the city, and which hosts the Islamic Centre Hamburg . A Jewish community also exists. As of 2022, around 2,500 Jews live in Hamburg. The city of Hamburg is one of 16 German states , therefore

711-562: A large scale, as for service water carts." Major Carl Rogers Darnall , Professor of Chemistry at the Army Medical School , gave the first practical demonstration of this in 1910. This work became the basis for present day systems of municipal water purification . Shortly after Darnall's demonstration, Major William J. L. Lyster of the Army Medical Department used a solution of calcium hypochlorite in

790-399: A linen bag to treat water. For many decades, Lyster's method remained the standard for U.S. ground forces in the field and in camps, implemented in the form of the familiar Lyster Bag (also spelled Lister Bag). The canvas "bag, water, sterilizing" was a common component of field kitchens, issued one per 100 persons, of a standard 36-gallon capacity that hung from an often-improvised tripod in

869-580: A member of the medieval Hanseatic League and a free imperial city of the Holy Roman Empire . Before the 1871 unification of Germany , it was a fully sovereign city state , and before 1919 formed a civic republic headed constitutionally by a class of hereditary Grand Burghers or Hanseaten . Beset by disasters such as the Great Fire of Hamburg , North Sea flood of 1962 and military conflicts including World War II bombing raids ,

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948-481: A new influx from the migrant crisis. There is an area in Hamburg behind the central station where many Afghan restaurants and shops are located. Many carpet businesses in Speicherstadt are operated by Afghan traders, with Hamburg still a global leader in the trade of oriental rugs. Hamburg residents with a foreign citizenship as of 31 December 2016 is as follows: As elsewhere in Germany, Standard German

1027-466: A town of around 500 inhabitants. In 1030, King Mieszko II Lambert of Poland burned down the city. Valdemar II of Denmark raided and occupied Hamburg in 1201 and in 1214. The Black Death killed at least 60% of the population in 1350. Hamburg experienced several great fires in the medieval period. In 1189, by imperial charter, Frederick I "Barbarossa" granted Hamburg the status of a Free Imperial City and tax-free access (or free-trade zone ) up

1106-405: Is manufactured from table salt (NaCl) by electrolysis in the chlor-alkali process. The resulting gas at atmospheric pressures is liquified at high pressure. The liquefied gas is transported and used as such. As a strong oxidizing agent , chlorine kills via the oxidation of organic molecules. Chlorine and the hydrolysis product hypochlorous acid are not charged and therefore easily penetrate

1185-573: Is a major international and domestic tourist destination . The Speicherstadt and Kontorhausviertel were declared World Heritage Sites by UNESCO in 2015. Hamburg's rivers and canals are crossed by around 2,500 bridges, making it the city with the highest number of bridges in Europe, and with 5 of the world's 29 tallest churches standing in Hamburg , it is also the city with the highest number of churches surpassing 100 metres (330 ft) worldwide. Aside from its rich architectural heritage,

1264-674: Is at a sheltered natural harbour on the southern fanning-out of the Jutland Peninsula , between Continental Europe to the south and Scandinavia to the north, with the North Sea to the west and the Baltic Sea to the northeast. It is on the River Elbe at its confluence with the Alster and Bille . The city centre is around the Binnenalster ("Inner Alster") and Außenalster ("Outer Alster"), both formed by damming

1343-565: Is delivered to the filtration plant by the New Croton Aqueduct and the Jerome Park Reservoir . The Croton plant has a capacity of 320 million U.S. gallons (1.2 billion liters) per day and is designed to remove 99.9% of Giardia cysts, Cryptosporidium, and viruses. The system uses conventional drinking water treatment technologies: The filtration plant was originally projected to cost $ 800 million, but

1422-585: Is estimated to be at the site of today's Domplatz . In 834 CE, Hamburg was designated as the seat of a bishopric . The first bishop, Ansgar , became known as the Apostle of the North. Two years later, Hamburg was united with Bremen as the Bishopric of Hamburg-Bremen . Hamburg was destroyed and occupied several times. In 845, 600 Viking ships sailed up the River Elbe and destroyed Hamburg, at that time

1501-466: Is harmless to life. Some compounds employed in commercial dechlorinators are sodium thiosulfate , sodium hydroxymethanesulfonate, and sodium hydroxymethane sulfinic acid. Hamburg Hamburg ( German: [ˈhambʊʁk] , locally also [ˈhambʊɪ̯ç] ; Low Saxon : Hamborg [ˈhambɔːç] ), officially the Free and Hanseatic City of Hamburg ,

1580-548: Is performed by mixing a large amount of hypochlorite into the water. The hypochlorite can be in the form of a powder or a liquid such as chlorine bleach (solution of sodium hypochlorite or calcium hypochlorite in water). Water that is being shock chlorinated should not be swum in or drunk until the sodium hypochlorite count in the water goes down to three parts per million (PPM) or until the calcium hypochlorite count goes down to 0.2 to 0.35 PPM. As an alternative to shock chlorination, some swimming pools are chlorinated by use of

1659-421: Is spoken in Hamburg, but as typical for northern Germany, the original language of Hamburg is Low German , usually referred to as Hamborger Platt (German Hamburger Platt ) or Hamborgsch . Since large-scale standardisation of the German language beginning in earnest in the 18th century, various Low German-coloured dialects have developed (contact-varieties of German on Low Saxon substrates). Originally, there

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1738-528: Is the second-largest city in Germany after Berlin and 6th-largest in the European Union with a population of over 1.9 million. The Hamburg Metropolitan Region has a population of over 5.1 million and is the eighth-largest metropolitan region by GDP in the European Union. At the southern tip of the Jutland Peninsula , Hamburg stands on the branching River Elbe at the head of

1817-485: Is used to prevent the spread of waterborne diseases such as cholera , dysentery , and typhoid . In a paper published in 1894, it was formally proposed to add chlorine to water to render it "germ-free". Two other authorities endorsed this proposal and published it in many other papers in 1895. Early attempts at implementing water chlorination at a water treatment plant were made in 1893 in Hamburg , Germany. In 1897

1896-608: The Croton Watershed come from naturally occurring sources and urban runoff pollution. The Croton system supplies about ten percent of the New York City water system and building a filtration system to address the turbidity problems had been proposed since the 1990s. The Croton filtration plant was built after a lawsuit was filed in 1997 against the City of New York by the U.S. Environmental Protection Agency (EPA),

1975-543: The Hasselbrack at 116.2 metres (381 ft) AMSL . Hamburg borders the states of Schleswig-Holstein and Lower Saxony . Hamburg has an oceanic climate ( Köppen : Cfb ; Trewartha : Dobk ), influenced by its proximity to the coast and maritime influences that originate over the Atlantic Ocean. The location in the north of Germany provides extremes greater than typical marine climates, but definitely in

2054-558: The Holy Roman Empire in 1806, the Free Imperial City of Hamburg was not incorporated into a larger administrative area while retaining special privileges ( mediatised ), but became a sovereign state with the official title of the Free and Hanseatic City of Hamburg . Hamburg was briefly annexed by Napoleon I to the First French Empire (1804–1814/1815). Russian forces under General Bennigsen finally freed

2133-789: The International Tribunal for the Law of the Sea , the EU-LAC Foundation , and the UNESCO Institute for Lifelong Learning , multipartite international political conferences and summits such as Europe and China and the G20 . Former German chancellors Helmut Schmidt and Angela Merkel were both born in Hamburg. The former Mayor of Hamburg , Olaf Scholz , has been the current German chancellor since December 2021. Hamburg

2212-515: The Mayor of Hamburg 's office corresponds more to the role of a minister-president than to that of a city mayor. As a German state government , it is responsible for public education, correctional institutions and public safety; as a municipality, it is additionally responsible for libraries, recreational facilities, sanitation, water supply and welfare services. Since 1897, the seat of the government has been Hamburg City Hall (Hamburg Rathaus), with

2291-580: The Neuengamme concentration camp (about 25 km (16 mi) outside the city in the marshlands), mostly from epidemics and in the destruction of Kriegsmarine vessels housing evacuees at the end of the war. Systematic deportations of Jewish Germans and Gentile Germans of Jewish descent started on 18 October 1941. These were all directed to ghettos in Nazi-occupied Europe or to concentration camps . Most deported persons perished in

2370-555: The Ordeelbook ( Ordeel : sentence). On 10 August 1410, civil unrest forced a compromise (German: Rezeß , literally meaning: withdrawal). This is considered the first constitution of Hamburg . In 1356, the Matthiae-Mahl feast dinner for Hanseatic League cities was celebrated for the first time on 25 February, the first day of spring in medieval times. It continues today as the world's oldest ceremonial meal. In 1529,

2449-561: The U.S. Department of Justice and the State of New York . The city settled the suit and a consent decree was issued with the condition that the city would build the plant by 2006. The city had been studying possible sites for such a plant for more than 20 years in both the Bronx and nearby Westchester County . The plant protects the public from Giardia and Cryptosporidium , microorganisms which can cause serious health problems. The project

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2528-561: The United States for disinfection took place in 1908 at Boonton Reservoir (on the Rockaway River ), which served as the supply for Jersey City, New Jersey . Chlorination was achieved by controlled additions of dilute solutions of chloride of lime ( calcium hypochlorite ) at doses of 0.2 to 0.35 ppm. The treatment process was conceived by John L. Leal , and the chlorination plant was designed by George Warren Fuller. Over

2607-553: The sea shanty Hamborger Veermaster , written in the 19th century when Low German was used more frequently. Many toponyms and street names reflect Low Saxon vocabulary, partially even in Low Saxon spelling, which is not standardised, and to some part in forms adapted to Standard German. 65.2% of the population is not religious or adherent other religions than the Evangelical Church or Catholicism. In 2018, 24.9% of

2686-488: The Croton filtration plant had been recently activated. The final project cost was $ 3.2 billion. The 830 by 550 feet (250 by 170 m) plant is larger than Yankee Stadium . Water chlorination Water chlorination is the process of adding chlorine or chlorine compounds such as sodium hypochlorite to water . This method is used to kill bacteria, viruses and other microbes in water. In particular, chlorination

2765-413: The Hamburg region ( Hamburg Metropolitan Region ) is home to 5,107,429 living on 196/km (510/sq mi). There were 915,319 women and 945,440 men in Hamburg. For every 1,000 females, there were 1,033 males. In 2015, there were 19,768 births in Hamburg (of which 38.3% were to unmarried women); 6422 marriages and 3190 divorces, and 17,565 deaths. In the city, the population was spread out, with 16.1% under

2844-784: The Holocaust . By the end of 1942, the Jüdischer Religionsverband in Hamburg was dissolved as an independent legal entity and its remaining assets and staff were assumed by the Reich Association of Jews in Germany (District Northwest). On 10 June 1943, the Reich Security Main Office dissolved the association by a decree. The few remaining employees not somewhat protected by a mixed marriage were deported from Hamburg on 23 June to Theresienstadt , where most of them perished. The city

2923-642: The Lower Elbe into the North Sea. In 1265, an allegedly forged letter was presented to or by the Rath of Hamburg. This charter, along with Hamburg's proximity to the main trade routes of the North Sea and Baltic Sea , quickly made it a major port in Northern Europe. Its trade alliance with Lübeck in 1241 marks the origin and core of the powerful Hanseatic League of trading cities. On 8 November 1266,

3002-732: The Mosholu Golf Course, was also built using Croton mitigation funds. The new plant allowed the city to provide greater capacity for its water system. This was especially important since the city was preparing to shut off part of the Delaware Aqueduct in 2022 allowing the completion of a tunnel that would bypass a leaking section of the aqueduct in Newburgh, New York . In May 2015 the New York City Department of Environmental Protection announced that

3081-715: The River Alster to create lakes. The islands of Neuwerk , Scharhörn , and Nigehörn , 100 kilometres (60 mi) away in the Hamburg Wadden Sea National Park , are also part of the city of Hamburg. The neighbourhoods of Neuenfelde , Cranz , Francop and Finkenwerder are part of the Altes Land (old land) region, the largest contiguous fruit-producing region in Central Europe. Neugraben-Fischbek has Hamburg's highest elevation,

3160-418: The aftermath of the raids. While some of the boroughs destroyed were rebuilt as residential districts after the war, others such as Hammerbrook were entirely developed into office, retail and limited residential or industrial districts. The Hamburg Commonwealth War Graves Commission Cemetery is in the greater Ohlsdorf Cemetery in the north of Hamburg. At least 42,900 people are thought to have perished in

3239-489: The age of 18, and 18.3% were 65 years of age or older. 356 people in Hamburg were over the age of 100. According to the Statistical Office for Hamburg and Schleswig-Holstein , the number of people with a migrant background is at 34% (631,246). Immigrants come from 200 countries. 5,891 people have acquired German cititzenship in 2016. In 2016, there were 1,021,666 households, of which 17.8% had children under

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3318-403: The age of 18; 54.4% of all households were made up of singles. 25.6% of all households were single parent households. The average household size was 1.8. Hamburg has the largest Portuguese community in Germany with about 30,000 people with Portuguese heritage . Many Portuguese sailors and merchants came to Hamburg beginning in the 15th century due to its port . Since the 1970s, there has been

3397-645: The boroughs and quarters have been rearranged several times. Each borough is governed by a Borough Council (German: Bezirksversammlung ) and administered by a Municipal Administrator (German: Bezirksamtsleiter ). The boroughs are not independent municipalities: their power is limited and subordinate to the Senate of Hamburg . The borough administrator is elected by the Borough Council and thereafter requires confirmation and appointment by Hamburg's Senate. The quarters have no governing bodies of their own. Since

3476-711: The category due to the prevailing westerlies. Nearby wetlands enjoy a maritime temperate climate. The amount of snowfall has varied greatly in recent decades. In the late 1970s and early 1980s, heavy snowfall sometimes occurred, the winters of recent years have been less cold, with snowfall just a few days per year. The warmest months are June, July, and August, with high temperatures of 20.1 to 22.5 °C (68.2 to 72.5 °F). The coldest are December, January, and February, with low temperatures of −0.3 to 1.0 °C (31.5 to 33.8 °F). The annual extreme temperatures range from −29.1 °C (−20.4 °F) on 13 February 1940, to 40.1 °C (104.2 °F) on 20 July 2022 , and

3555-534: The city embraced Lutheranism , and it received Reformed refugees from the Netherlands and France. When Jan van Valckenborgh introduced a second layer to the fortifications to protect against the Thirty Years' War in the seventeenth century, he extended Hamburg and created a "New Town" ( Neustadt ) whose street names still date from the grid system of roads he introduced. From the autumn of 1696 to

3634-453: The city from most of its hinterland and reduced Hamburg's global trade. Since German reunification in 1990, and the accession of several Central European and Baltic countries into the European Union in 2004, the Port of Hamburg has restarted ambitions for regaining its position as the region's largest deep-sea port for container shipping and its major commercial and trading centre. Hamburg

3713-442: The city has managed to recover and emerge wealthier after each catastrophe. Major regional broadcaster NDR , the printing and publishing firm Gruner + Jahr and the newspapers Der Spiegel and Die Zeit are based in the city. Hamburg is the seat of Germany's oldest stock exchange and the world's oldest merchant bank , Berenberg Bank . Media, commercial, logistical, and industrial firms with significant locations in

3792-487: The city in 1814. Hamburg re-assumed its pre-1811 status as a city-state in 1814. The Vienna Congress of 1815 confirmed Hamburg's independence and it became one of 39 sovereign states of the German Confederation (1815–1866). In 1842, about a quarter of the inner city was destroyed in the " Great Fire ". The fire started on the night of 4 May and was not extinguished until 8 May. It destroyed three churches,

3871-645: The city include multinationals Airbus , Blohm + Voss , Aurubis , Beiersdorf , Lufthansa and Unilever . Hamburg is also a major European science, research, and education hub , with several universities and institutions, including the Deutsches Elektronen-Synchrotron Laboratory DESY . The city enjoys a very high quality of living, being ranked 19th in the 2019 Mercer Quality of Living Survey. Hamburg hosts specialists in world economics and international law, including consular and diplomatic missions such as

3950-552: The city is also home to notable cultural venues such as the Elbphilharmonie and Laeiszhalle concert halls. It gave birth to movements like Hamburger Schule and paved the way for bands including the Beatles . Hamburg is also known for several theatres and a variety of musical shows. St. Pauli 's Reeperbahn is among the best-known European red light districts. Claudius Ptolemy (2nd century AD) reported

4029-462: The city. Hamburg was the departure port for many Germans and Eastern Europeans to emigrate to the United States in the late 19th and early 20th centuries. Trading communities from all over the world established themselves there. A major outbreak of cholera in 1892 was badly handled by the city government, which retained an unusual degree of independence for a German city. About 8,600 died in

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4108-608: The coalition broke apart on 28 November 2010. On 7 March 2011 Olaf Scholz ( SPD ) became mayor. After the 2015 election the SPD and the Alliance 90/The Greens formed a coalition. Hamburg is made up of seven boroughs (German: Bezirke ) and subdivided into 104 quarters (German: Stadtteile ). There are 181 localities (German: Ortsteile ). The urban organisation is regulated by the Constitution of Hamburg and several laws. Most of

4187-897: The field. In use from World War I through the Vietnam War, it has been replaced by reverse osmosis systems that produce potable water by pressure straining local water through microscopic-level filters: the Reverse Osmosis Water Purification Unit (1980) and the Tactical Water Purification System (2007) for large-scale production, and the Light Water Purifier unit for smaller-scale needs that includes ultrafiltration technology to produce potable water from any source and uses automated backwash cycles every 15 minutes to simplify cleaning operations. Chlorine gas

4266-677: The first name for the vicinity as Treva . The name Hamburg comes from the first permanent building on the site, a castle which the Emperor Charlemagne ordered constructed in AD 808. It rose on rocky terrain in a marsh between the River Alster and the River Elbe as a defence against Slavic incursion, and acquired the name Hammaburg , burg meaning castle or fort. The origin of the Hamma term remains uncertain, but its location

4345-663: The largest German epidemic of the late 19th century, and the last major cholera epidemic in a major city of the Western world. Hamburg was a Gau within the administrative division of Nazi Germany from 1934 until 1945. During the Second World War , the Allied bombing of Hamburg devastated much of the city and the harbour. On 23 July 1943, the Royal Air Force and United States Army Air Force firebombing created

4424-583: The latest territorial reform of March 2008, the boroughs are Hamburg-Mitte , Altona , Eimsbüttel , Hamburg-Nord , Wandsbek , Bergedorf , and Harburg . Hamburg-Mitte ("Hamburg Centre") covers mostly the urban centre of the city and consists of the quarters Billbrook , Billstedt , Borgfelde , Finkenwerder , HafenCity , Hamm , Hammerbrook , Horn , Kleiner Grasbrook , Neuwerk , Rothenburgsort , St. Georg , St. Pauli , Steinwerder , Veddel , Waltershof , and Wilhelmsburg . The quarters Hamburg-Altstadt ("old town") and Neustadt ("new town") are

4503-453: The latter was measured at Hamburg-Neuwiedenthal Meteorological Station, on the same day, a high temperature record of 39.1 °C (102.4 °F) was recorded at Hamburg Airport . View climate chart 1986–2016 or 1960–1990 On 31 December 2016, there were 1,860,759 people registered as living in Hamburg in an area of 755.3 km (291.6 sq mi). The population density was 2,464/km (6,380/sq mi). The metropolitan area of

4582-481: The main disinfectant by-products created from chlorination. Their effects depend strictly on the duration of their exposure to the chemicals and the amount ingested into the body. In high doses, bromoform mainly slows down regular brain activity, which is manifested by symptoms such as sleepiness or sedation. Chronic exposure of both bromoform and dibromochloromethane can cause liver and kidney cancer, as well as heart disease, unconsciousness, or death in high doses. Due to

4661-408: The major species are Cl 2 and HOCl, whereas in alkaline solution, effectively only ClO ( hypochlorite ion) is present. Very small concentrations of ClO 2 , ClO 3 , ClO 4 are also found. Shock chlorination is a process used in many swimming pools, water wells , springs , and other water sources to reduce the bacterial and algal residue in the water. Shock chlorination

4740-425: The negatively charged surface of pathogens. It is able to disintegrate the lipids that compose the cell wall and react with intracellular enzymes and proteins , making them nonfunctional. Microorganisms then either die or are no longer able to multiply. When dissolved in water, chlorine converts to an equilibrium mixture of chlorine, hypochlorous acid (HOCl), and hydrochloric acid (HCl): In acidic solution,

4819-525: The next few years, chlorine disinfection using chloride of lime (calcium hypochlorite) was rapidly implemented in drinking water systems around the world. The technique of purification of drinking water by use of compressed liquefied chlorine gas was developed by a British officer in the Indian Medical Service , Vincent B. Nesfield, in 1903. According to his own account, "It occurred to me that chlorine gas might be found satisfactory ... if suitable means could be found for using it.... The next important question

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4898-445: The office of the mayor, the meeting room for the Senate and the floor for the Hamburg Parliament . From 2001 until 2010, the mayor of Hamburg was Ole von Beust , who governed in Germany's first statewide "black-green" coalition, consisting of the conservative CDU Hamburg and the alternative GAL, which are Hamburg's regional wing of the Alliance 90/The Greens party. Von Beust was briefly succeeded by Christoph Ahlhaus in 2010, but

4977-612: The population belonged to the North Elbian Evangelical Lutheran Church , the largest religious body, and 9.9% to the Roman Catholic Church . Hamburg is seat of one of the three bishops of the Evangelical Lutheran Church in Northern Germany and seat of the Roman Catholic Archdiocese of Hamburg . According to the publication Muslimisches Leben in Deutschland (" Muslim life in Germany "), an estimated 141,900 Muslim migrants (from nearly 50 countries of origin) lived in Hamburg in 2008. About three years later (May 2011) calculations based on census data for 21 countries of origin resulted in

5056-542: The potential carcinogenicity of these compounds, drinking water regulations across the developed world require regular monitoring of the concentration of these compounds in the distribution systems of municipal water systems. The World Health Organization has stated that "the risks to health from these by-products are extremely small in comparison with the risks associated with inadequate disinfection". There are also other concerns regarding chlorine, including its volatile nature which causes it to disappear too quickly from

5135-421: The project experienced delays and ballooning costs due to objections from the local community, which required the city to propose alternate sites for such a plant. To lessen the disruption caused by the plant's construction, in 2010 the city used mitigation funds from the construction budget to restore the Van Cortlandt Park Parade Ground. The Sachkerah Woods Playground, located at the park's southeast corner near

5214-399: The quarters were former independent cities, towns or villages annexed into Hamburg proper. The last large annexation was done through the Greater Hamburg Act of 1937, when the cities Altona , Harburg , and Wandsbek were merged into the state of Hamburg. The Act of the Constitution and Administration of Hanseatic city of Hamburg established Hamburg as a state and a municipality. Some of

5293-429: The second half of the 19th century when its population more than quadrupled to 800,000 as the growth of the city's Atlantic trade helped make it Europe's second-largest port. The Hamburg-America Line , with Albert Ballin as its director, became the world's largest transatlantic shipping company around the start of the 20th century. Shipping companies sailing to South America, Africa, India and East Asia were based in

5372-453: The separation of Church and State, freedom of the press, of assembly and association. Hamburg became a member of the North German Confederation (1866–1871) and of the German Empire (1871–1918), and maintained its self-ruling status during the Weimar Republic (1919–1933). Hamburg acceded to the German Customs Union or Zollverein in 1888, the last (along with Bremen) of the German states to join. The city experienced its fastest growth during

5451-403: The spring of 1697 the Company of Scotland trading to Africa and the Indies was active in Hamburg. While it was unsuccessful in raising capital locally, it commissioned the construction of four vessels in the port. The Caledonia , a ship of 600 tons with 56 guns, and the Instuaration (later renamed the St. Andrew ), a vessel of 350 tons, were launched in March 1697. Upon the dissolution of

5530-416: The town hall, and many other buildings, killing 51 people and leaving an estimated 20,000 homeless. Reconstruction took more than 40 years. After periodic political unrest, particularly in 1848 , Hamburg adopted in 1860 a semidemocratic constitution that provided for the election of the Senate, the governing body of the city-state, by adult taxpaying males. Other innovations included the separation of powers,

5609-522: The town of Maidstone , England was the first to have its entire water supply treated with chlorine. Permanent water chlorination began in 1905, when a faulty slow sand filter and a contaminated water supply caused a serious typhoid fever epidemic in Lincoln , England. Alexander Cruickshank Houston used chlorination of the water to stop the epidemic. His installation fed a concentrated solution of so-called "chlorinated lime" (a mixture of calcium hypochlorite , calcium hydroxide and calcium chloride ) to

5688-406: The water being treated. This was not simply modern calcium chloride, but contained chlorine gas dissolved in lime-water (dilute calcium hydroxide) to form calcium hypochlorite (chlorinated lime). The chlorination of the water supply helped stop the epidemic and as a precaution, the chlorination was continued until 1911 when a new water supply was commissioned. The first continuous use of chlorine in

5767-524: The water system, and organoleptic concerns such as taste and odor. A dechlorinator is a chemical additive that removes chlorine or chloramine from water. Where tap water is chlorinated, it should be dechlorinated before use in an aquarium , since chlorine can harm aquatic life in the same way it kills micro-organisms . Chlorine will kill fish and cause damage to an aquarium's biological filter . Chemicals that serve this function are reducing agents which reduce chlorine species to chloride , which

5846-408: Was a range of such Missingsch varieties, the best-known being the low-prestige ones of the working classes and the somewhat more bourgeois Hanseatendeutsch (Hanseatic German), although the term is used in appreciation. All of these are now moribund due to the influences of Standard German used by education and media. However, the former importance of Low German is indicated by several songs, such as

5925-580: Was first used on a continuing basis to disinfect the water supply at the Belmont filter plant, Philadelphia , Pennsylvania by using a machine invented by Charles Frederick Wallace who dubbed it the Chlorinator. It was manufactured by the Wallace & Tiernan company beginning in 1913. By 1941, disinfection of U.S. drinking water by chlorine gas had largely replaced the use of chloride of lime. As

6004-417: Was how to render the gas portable. This might be accomplished in two ways: by liquefying it, and storing it in lead-lined iron vessels, having a jet with a very fine capillary canal, and fitted with a tap or a screw cap. The tap is turned on, and the cylinder placed in the amount of water required. The chlorine bubbles out, and in ten to fifteen minutes the water is absolutely safe. This method would be of use on

6083-647: Was spearheaded by then Commissioner Christopher O. Ward . In the city's early plans, it considered that one of the Croton plant's additional benefits would be to reduce the city's dependence on its two other water sources, the Catskill Aqueduct and Delaware Aqueduct , which at the time were only minimally filtered. Subsequently the city built the Catskill-Delaware Water Ultraviolet Disinfection Facility , which began operation in 2013. Raw water

6162-590: Was suggested by Portuguese residents to bring visibility to the Portuguese community in Hamburg. Hamburg's Afghan community of about 50,000 people is the largest not only in Germany, but also in Europe. They first came to Hamburg in the 1970s before expanding during the Afghan conflict in the 1980s and 1990s where many Afghan migrants chose to live in Hamburg. After 2015 the Afghan population almost doubled due to

6241-659: Was surrendered to British Forces on 3 May 1945, in the Battle of Hamburg , three days after Adolf Hitler 's death. After the Second World War , Hamburg formed part of the British Zone of Occupation ; it became a state of West Germany in 1949. On 16 February 1962, a North Sea flood caused the Elbe to rise to an all-time high, inundating one-fifth of Hamburg and killing more than 300 people. The inner German border – only 50 kilometres (30 mi) east of Hamburg – separated

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