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EWG's Tap Water Database — 2021 UPDATE

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What About Lead?

Montville Water Supply - 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: 22

Highest level detected in 2019: 7.5 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
2019-11-20CE657637.50 ppb
2019-11-21CE657717.20 ppb
2019-11-21CE657721.50 ppb
2019-11-20CE657641.30 ppb
2019-11-21CE65773ND
2019-11-23CE67754ND
2019-11-22CE67753ND
2019-11-21CE65766ND
2019-11-21CE65762ND
2019-11-21CE65757ND
2019-11-21CE65756ND
2019-11-21CE65755ND
2019-11-21CE65754ND
2019-11-21CE65760ND
2019-11-21CE65759ND
2019-11-20CE65761ND
2019-11-21CE65770ND
2019-11-21CE65769ND
2019-11-20CE65768ND
2019-11-20CE65767ND
2019-11-20CE65765ND
2019-11-20CE65758ND
MORE
LESS

Read more about lead here.