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EWG's Tap Water Database — 2021 UPDATE

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What About Lead?

City of Petersburg - 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: 31

Highest level detected in 2019: 8.6 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
2019-08-28E1907035108.64 ppb
2019-08-30E190703511ND
2019-09-25E190901542ND
2019-09-24E190901544ND
2019-09-21E190901540ND
2019-09-18E190901543ND
2019-09-17E190901545ND
2019-09-17E190901541ND
2019-08-30E190703546ND
2019-08-30E190703540ND
2019-08-30E190703534ND
2019-08-30E190703532ND
2019-08-30E190703525ND
2019-08-30E190703522ND
2019-08-30E190703521ND
2019-08-30E190703514ND
2019-08-30E190703512ND
2019-08-27E190703508ND
2019-08-30E190703509ND
2019-08-30E190703507ND
2019-08-29E190703539ND
2019-08-29E190703515ND
2019-08-29E190703506ND
2019-08-28E190703523ND
2019-08-28E190703517ND
2019-08-27E190703537ND
2019-08-27E190703529ND
2019-08-27E190703524ND
2019-08-27E190703520ND
2019-08-27E190703516ND
2019-08-27E190703513ND
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Read more about lead here.