Water conditioning for LCR compliance and control of metals release in San Francisco's water system
The experience of the San Francisco Public Utilities Commission (SFPUC) demonstrates that maintaining high pH (target pH 9.4 for Hetch Hetchy water and pH 8.6 and 8.9 for other water supplies) is an appropriate corrosion control treatment to comply with the Lead and Copper Rule (LCR) and to control...
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| Veröffentlicht in: | Journal - American Water Works Association 2010-03, Vol.102 (3), p.52-64 |
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| container_title | Journal - American Water Works Association |
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| creator | WILCZAK, ANDRZEJ HOKANSON, DAVID R. TRUSSELL, R. RHODES BOOZARPOUR, MANOUCHEHR DEGRACA, ANDREW F. |
| description | The experience of the San Francisco Public Utilities Commission (SFPUC) demonstrates that maintaining high pH (target pH 9.4 for Hetch Hetchy water and pH 8.6 and 8.9 for other water supplies) is an appropriate corrosion control treatment to comply with the Lead and Copper Rule (LCR) and to control metals release in low‐alkalinity water and is more effective than adjusting the Langelier saturation index or augmenting alkalinity. A survey of corrosion control treatment for utilities treating soft, low‐alkalinity waters found that high pH has been successful in minimizing the release of lead and copper from plumbing. The combination of water quality and distribution system conditions at SFPUC is such that a switch from free to combined chlorine had no effect on lead and copper release and LCR compliance. The analysis presented here was originally developed as part of a project and compliance report to the California Department of Public Health to evaluate corrosion control treatment at SFPUC following systemwide chloramination and fluoridation. Additional historical information and more recent water quality data are provided to complement the analysis. |
| doi_str_mv | 10.1002/j.1551-8833.2010.tb10072.x |
| format | Article |
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The combination of water quality and distribution system conditions at SFPUC is such that a switch from free to combined chlorine had no effect on lead and copper release and LCR compliance. The analysis presented here was originally developed as part of a project and compliance report to the California Department of Public Health to evaluate corrosion control treatment at SFPUC following systemwide chloramination and fluoridation. 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The combination of water quality and distribution system conditions at SFPUC is such that a switch from free to combined chlorine had no effect on lead and copper release and LCR compliance. The analysis presented here was originally developed as part of a project and compliance report to the California Department of Public Health to evaluate corrosion control treatment at SFPUC following systemwide chloramination and fluoridation. 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A survey of corrosion control treatment for utilities treating soft, low‐alkalinity waters found that high pH has been successful in minimizing the release of lead and copper from plumbing. The combination of water quality and distribution system conditions at SFPUC is such that a switch from free to combined chlorine had no effect on lead and copper release and LCR compliance. The analysis presented here was originally developed as part of a project and compliance report to the California Department of Public Health to evaluate corrosion control treatment at SFPUC following systemwide chloramination and fluoridation. Additional historical information and more recent water quality data are provided to complement the analysis.</abstract><cop>Denver</cop><pub>American Water Works Association</pub><doi>10.1002/j.1551-8833.2010.tb10072.x</doi><tpages>13</tpages></addata></record> |
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| ispartof | Journal - American Water Works Association, 2010-03, Vol.102 (3), p.52-64 |
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| language | eng |
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| source | Wiley Online Library Journals Frontfile Complete; Jstor Complete Legacy |
| subjects | 20th century Alkalinity Calcium Carbonate Chemistry Chloramines Chlorine Compliance Contamination Copper Corrosion Corrosion Control Corrosion prevention Drinking water Lead Metals Potable water Public utilities Regulatory Update River water San Francisco, California Water conditioning Water mains Water Quality Water Systems Water treatment Water utilities |
| title | Water conditioning for LCR compliance and control of metals release in San Francisco's water system |
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