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EWG's Tap Water Database — 2021 UPDATE

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What About Lead?

City of Columbus - 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: 5.0 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
2019-07-026145824.96 ppb
2019-07-096145951.54 ppb
2019-06-266145681.42 ppb
2019-07-096145921.22 ppb
2019-06-266145761.17 ppb
2019-07-026145841.06 ppb
2019-06-276145710.978 ppb
2019-06-266145780.893 ppb
2019-07-096145890.886 ppb
2019-07-026145790.818 ppb
2019-07-026145720.766 ppb
2019-07-026145850.560 ppb
2019-07-09614588ND
2019-07-02614583ND
2019-07-09614590ND
2019-07-09614591ND
2019-07-09614593ND
2019-07-09614594ND
2019-07-09614596ND
2019-07-09614597ND
2019-07-08614587ND
2019-07-02614586ND
2019-07-02614581ND
2019-07-02614580ND
2019-06-27614569ND
2019-06-26614577ND
2019-06-26614575ND
2019-06-26614574ND
2019-06-26614573ND
2019-06-26614570ND
MORE
LESS

Read more about lead here.