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EWG's Tap Water Database — 2021 UPDATE

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What About Lead?

North Alamo Water Supply Company - 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: 50

Highest level detected in 2019: 9.7 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
2019-07-0618017389.73 ppb
2019-07-071801736ND
2019-07-061801709ND
2019-07-061801707ND
2019-07-061801725ND
2019-07-061801693ND
2019-07-061801728ND
2019-07-061801732ND
2019-07-061801733ND
2019-07-061801734ND
2019-07-061801735ND
2019-07-061801715ND
2019-07-061801731ND
2019-07-061801710ND
2019-07-071801699ND
2019-07-071801704ND
2019-07-071801741ND
2019-07-071801711ND
2019-07-071801705ND
2019-07-071801695ND
2019-07-071801712ND
2019-07-081801700ND
2019-07-081801743ND
2019-07-081801708ND
2019-07-101801713ND
2019-07-041801714ND
2019-07-041801716ND
2019-07-041801730ND
2019-07-041801724ND
2019-07-041801729ND
2019-07-041801737ND
2019-07-041801702ND
2019-07-041801739ND
2019-07-041801721ND
2019-07-041801720ND
2019-07-041801719ND
2019-07-041801718ND
2019-07-041801717ND
2019-07-041801722ND
2019-07-041801723ND
2019-07-051801726ND
2019-07-051801727ND
2019-07-051801740ND
2019-07-051801742ND
2019-07-051801696ND
2019-07-051801697ND
2019-07-051801698ND
2019-07-051801701ND
2019-07-051801703ND
2019-07-051801706ND
MORE
LESS

Read more about lead here.