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EWG's Tap Water Database — 2021 UPDATE

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What About Lead?

City of Rockdale - 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: 38.0 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
2019-10-23Q197473200638.0 ppb
2019-10-22Q197473200516.0 ppb
2019-04-16Q191703801911.0 ppb
2019-10-23Q19747320219.10 ppb
2019-04-16Q19170380027.30 ppb
2019-10-25Q19747320136.00 ppb
2019-10-23Q19747320321.70 ppb
2019-04-16Q19170380141.70 ppb
2019-04-16Q19170380201.60 ppb
2019-10-23Q19747320191.40 ppb
2019-10-23Q1974732009ND
2019-10-23Q1974732027ND
2019-10-23Q1974732002ND
2019-10-23Q1974732024ND
2019-10-23Q1974732023ND
2019-10-23Q1974732022ND
2019-04-16Q1917038016ND
2019-10-23Q1974732020ND
2019-10-23Q1974732018ND
2019-10-23Q1974732017ND
2019-10-23Q1974732014ND
2019-10-23Q1974732011ND
2019-10-23Q1974732010ND
2019-10-23Q1974732040ND
2019-10-23Q1974732007ND
2019-04-16Q1917038017ND
2019-10-23Q1974732037ND
2019-10-23Q1974732038ND
2019-10-23Q1974732036ND
2019-10-23Q1974732004ND
2019-10-24Q1974732025ND
2019-10-24Q1974732015ND
2019-10-24Q1974732016ND
2019-10-24Q1974732012ND
2019-04-16Q1917038018ND
2019-10-22Q1974732008ND
2019-04-16Q1917038010ND
2019-04-16Q1917038009ND
2019-04-16Q1917038008ND
2019-04-16Q1917038007ND
2019-04-16Q1917038006ND
2019-04-16Q1917038005ND
2019-04-16Q1917038004ND
2019-04-16Q1917038003ND
2019-04-16Q1917038013ND
2019-04-17Q1917038011ND
2019-10-22Q1974732003ND
2019-04-16Q1917038015ND
2019-10-23Q1974732028ND
2019-10-22Q1974732026ND
2019-10-22Q1974732029ND
2019-10-22Q1974732039ND
2019-10-22Q1974732001ND
2019-10-23Q1974732035ND
2019-10-23Q1974732034ND
2019-10-23Q1974732033ND
2019-04-16Q1917038001ND
2019-10-23Q1974732031ND
2019-10-23Q1974732030ND
2019-04-16Q1917038012ND
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Read more about lead here.