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2. Swimming pool sanitation - Wikipedia

   en.wikipedia.org/wiki/Swimming_pool_sanitation

   An electrically operated water pump is the prime motivator in recirculating the water from the pool. Water is forced through a filter and then returned to the pool. Using a water pump by itself is often not sufficient to completely sanitize a pool. Commercial and public pool pumps usually run 24 hours a day for the entire operating season of ...

3. Salt water chlorination - Wikipedia

   en.wikipedia.org/wiki/Salt_water_chlorination

   Salt water chlorination is a process that uses dissolved salt (1000–4000 ppm or 1–4 g/L) for the chlorination of swimming pools and hot tubs.The chlorine generator (also known as salt cell, salt generator, salt chlorinator, or SWG) uses electrolysis in the presence of dissolved salt to produce chlorine gas or its dissolved forms, hypochlorous acid and sodium hypochlorite, which are already ...

4. Water purification - Wikipedia

   en.wikipedia.org/wiki/Water_purification

   Pure water has a pH close to 7 (neither alkaline nor acidic). Sea water can have pH values that range from 7.5 to 8.4 (moderately alkaline). Fresh water can have widely ranging pH values depending on the geology of the drainage basin or aquifer and the influence of contaminant inputs .

5. Monochloramine - Wikipedia

   en.wikipedia.org/wiki/Monochloramine

   [9] [10] Some pool test kits designed for use by homeowners do not distinguish free chlorine and chloramines, which can be misleading and lead to non-optimal levels of chloramines in the pool water. [11] There is also evidence that exposure to chloramine can contribute to respiratory problems, including asthma, among swimmers. [12]

6. pH - Wikipedia

   en.wikipedia.org/wiki/PH

   Pure water has a pH of 7 at 25 °C, meaning it is neutral. ... (CO 2) levels exceeding 410 ppm (in 2020). CO 2 from the atmosphere is absorbed by the oceans.

7. Disinfection by-product - Wikipedia

   en.wikipedia.org/wiki/Disinfection_by-product

   The United States Environmental Protection Agency has set Maximum Contaminant Levels (MCLs) for bromate, chlorite, haloacetic acids and total trihalomethanes (TTHMs). [19] In Europe, the level of TTHMs has been set at 100 micrograms per litre, and the level for bromate to 10 micrograms per litre, under the Drinking Water Directive. [20]