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EWG's Tap Water Database — 2021 UPDATE

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What About Lead?

City of Weslaco - 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: 1.9 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
2019-09-12Q19648260161.90 ppb
2019-09-11Q19648260091.20 ppb
2019-09-11Q19648260151.20 ppb
2019-09-11Q1964826008ND
2019-08-23Q1962698018ND
2019-09-12Q1964826018ND
2019-09-12Q1964826017ND
2019-09-11Q1964826003ND
2019-09-11Q1964826002ND
2019-09-11Q1964826001ND
2019-09-11Q1964826004ND
2019-08-23Q1962698024ND
2019-09-11Q1964826014ND
2019-09-11Q1964826013ND
2019-09-11Q1964826005ND
2019-09-11Q1964826006ND
2019-09-11Q1964826007ND
2019-08-23Q1962698020ND
2019-08-23Q1962698026ND
2019-09-11Q1964826010ND
2019-09-11Q1964826011ND
2019-09-11Q1964826012ND
2019-08-30Q1962698007ND
2019-08-30Q1962698023ND
2019-08-30Q1962698025ND
2019-08-30Q1962698030ND
2019-08-23Q1962698029ND
2019-08-23Q1962698028ND
2019-08-23Q1962698027ND
2019-08-23Q1962698008ND
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Read more about lead here.