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EWG's Tap Water Database — 2021 UPDATE

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What About Lead?

North Liberty 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: 60

Highest level detected in 2019: 1.0 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
2019-04-29OE8013441.000 ppb
2019-04-16OE7950501.000 ppb
2019-04-24OE798802ND
2019-04-16OE795752ND
2019-04-16OE795753ND
2019-04-17OE795754ND
2019-04-17OE796368ND
2019-04-17OE796369ND
2019-04-18OE796370ND
2019-04-23OE798189ND
2019-04-23OE798190ND
2019-04-23OE798191ND
2019-04-24OE798797ND
2019-04-24OE798798ND
2019-04-24OE798799ND
2019-04-24OE798800ND
2019-04-24OE798801ND
2019-04-16OE795058ND
2019-04-24OE798803ND
2019-04-24OE798804ND
2019-04-24OE798805ND
2019-04-24OE798806ND
2019-04-24OE799430ND
2019-04-25OE799426ND
2019-04-25OE799427ND
2019-04-25OE799428ND
2019-04-25OE799429ND
2019-04-29OE800598ND
2019-04-30OE801345ND
2019-04-30OE801346ND
2019-05-22OE811236ND
2019-04-10OE792346ND
2019-04-09OE791713ND
2019-04-09OE791714ND
2019-04-09OE791715ND
2019-04-09OE791716ND
2019-04-09OE791717ND
2019-04-09OE791718ND
2019-04-09OE791719ND
2019-04-09OE791720ND
2019-04-09OE791721ND
2019-04-09OE791723ND
2019-04-09OE792347ND
2019-04-10OE792343ND
2019-04-10OE792344ND
2019-04-10OE792345ND
2019-04-08OE791722ND
2019-04-10OE792376ND
2019-04-10OE793163ND
2019-04-11OE793164ND
2019-04-12OE793678ND
2019-04-15OE795048ND
2019-04-15OE795049ND
2019-04-16OE795051ND
2019-04-16OE795052ND
2019-04-16OE795053ND
2019-04-16OE795054ND
2019-04-16OE795055ND
2019-04-16OE795056ND
2019-04-16OE795057ND
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Read more about lead here.