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EWG's Tap Water Database — 2021 UPDATE

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What About Lead?

Manville WSC - click here to return to the utility page.

According to EWG’s analysis of 2019 lead testing results, this utility complied with federal water quality regulations for lead. Under the federal Lead and Copper Rule, lead concentrations must be below 15 parts per billion (ppb) in 90 percent of households sampled. If this legal limit is exceeded, the water utility must apply measures to control lead leaching from water pipes.

Number of lead samples taken in 2019: 60

Highest level detected in 2019: 5.9 ppb

Levels of lead detected


Complying with the EPA's lead rules doesn't mean that the water is safe for children to drink. The EPA’s recent modeling suggests that lead concentrations in the 3.8 to 15 ppb range can put a formula-fed baby at risk of elevated blood lead levels. In 2009, the California Office of Environmental Health Hazard Assessment set a public health goal level of 0.2 ppb for lead in drinking water to protect against even subtle IQ loss in children.

Lead Results, 2019

Samples in red indicate that the sample is above the EPA action level.

DateLab IDResult
2019-04-03Q19138870105.90 ppb
2019-05-15Q19279970144.80 ppb
2019-05-17Q19279970134.60 ppb
2019-05-16Q19279970043.30 ppb
2019-05-16Q19279970081.80 ppb
2019-05-16Q19279970021.80 ppb
2019-05-16Q19279970061.60 ppb
2019-06-17Q19373120101.50 ppb
2019-05-09Q19251080051.50 ppb
2019-06-13Q19373120011.40 ppb
2019-06-14Q19373120081.30 ppb
2019-06-13Q19373120041.30 ppb
2019-06-24Q19398730011.30 ppb
2019-06-14Q19373120131.20 ppb
2019-05-09Q19251080031.20 ppb
2019-05-09Q19251080041.20 ppb
2019-05-17Q19279970031.20 ppb
2019-05-09Q19251080061.10 ppb
2019-06-13Q19373120051.10 ppb
2019-04-03Q19138870071.10 ppb
2019-06-13Q19373120121.000 ppb
2019-03-20Q19119880071.000 ppb
2019-06-13Q1937312007ND
2019-06-25Q1939873002ND
2019-05-17Q1927997015ND
2019-06-13Q1937312003ND
2019-05-16Q1927997012ND
2019-05-16Q1927997011ND
2019-05-16Q1927997010ND
2019-06-14Q1937312009ND
2019-06-14Q1937312002ND
2019-06-14Q1937312011ND
2019-05-16Q1927997001ND
2019-06-17Q1937312006ND
2019-03-19Q1911988001ND
2019-04-03Q1913887001ND
2019-03-20Q1911988008ND
2019-03-20Q1911988009ND
2019-03-20Q1911988010ND
2019-03-20Q1911988006ND
2019-03-20Q1911988002ND
2019-03-20Q1911988003ND
2019-03-20Q1911988005ND
2019-03-20Q1911988004ND
2019-04-02Q1913887003ND
2019-04-03Q1913887006ND
2019-04-03Q1913887008ND
2019-04-03Q1913887009ND
2019-05-16Q1927997005ND
2019-04-03Q1913887002ND
2019-04-04Q1913887005ND
2019-04-04Q1913887004ND
2019-05-08Q1925108007ND
2019-05-09Q1925108009ND
2019-05-09Q1925108001ND
2019-05-09Q1925108008ND
2019-05-09Q1925108010ND
2019-05-09Q1925108002ND
2019-05-16Q1927997009ND
2019-05-16Q1927997007ND
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Read more about lead here.