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EWG's Tap Water Database — 2021 UPDATE

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What About Lead?

Gladstone - 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: 15.3 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
2019-06-19AD4444515.3 ppb
2019-06-20AD4444311.7 ppb
2019-06-21AD444643.65 ppb
2019-06-21AD444503.42 ppb
2019-06-25AD444683.26 ppb
2019-06-25AD444633.25 ppb
2019-06-17AD444602.39 ppb
2019-06-25AD444701.78 ppb
2019-06-20AD444521.65 ppb
2019-06-27AD444661.58 ppb
2019-06-19AD444461.55 ppb
2019-06-19AD444571.40 ppb
2019-06-19AD444531.34 ppb
2019-06-25AD444671.31 ppb
2019-06-25AD444621.20 ppb
2019-06-25AD444591.02 ppb
2019-06-26AD44461ND
2019-06-26AD44454ND
2019-06-26AD44458ND
2019-06-27AD44449ND
2019-06-28AD44471ND
2019-07-15AD44455ND
2019-06-25AD44469ND
2019-06-24AD44451ND
2019-06-20AD44465ND
2019-06-20AD44448ND
2019-06-19AD44447ND
2019-06-19AD44456ND
2019-06-19AD44442ND
2019-06-19AD44444ND
MORE
LESS

Read more about lead here.