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EWG's Tap Water Database — 2021 UPDATE

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What About Lead?

St. Charles County PWSD 2 - 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: 30

Highest level detected in 2019: 1.8 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
2019-08-21AD459751.76 ppb
2019-09-19AD459561.73 ppb
2019-08-22AD459601.33 ppb
2019-08-23AD459701.29 ppb
2019-08-26AD45968ND
2019-08-21AD45963ND
2019-09-18AD45953ND
2019-09-18AD45974ND
2019-09-18AD45955ND
2019-09-18AD45952ND
2019-09-18AD45954ND
2019-09-09AD45957ND
2019-09-04AD45958ND
2019-09-04AD45959ND
2019-09-03AD45980ND
2019-08-29AD45973ND
2019-08-28AD45981ND
2019-08-26AD45976ND
2019-08-22AD45962ND
2019-08-26AD45964ND
2019-08-26AD45971ND
2019-08-26AD45969ND
2019-08-24AD45977ND
2019-08-24AD45979ND
2019-08-24AD45972ND
2019-08-24AD45978ND
2019-08-23AD45965ND
2019-08-23AD45966ND
2019-08-22AD45961ND
2019-08-22AD45967ND
MORE
LESS

Read more about lead here.