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EWG's Tap Water Database — 2021 UPDATE

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What About Lead?

Loudoun Water - Central System - 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: 123

Highest level detected in 2019: 7.7 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
2019-05-2292430693001_LC7.70 ppb
2019-05-2292430332001_LC2.10 ppb
2019-05-2192430332002_LCND
2019-05-2192430332006_LCND
2019-05-2192430332008_LCND
2019-05-2192430348002_LCND
2019-05-2192430348006_LCND
2019-05-2192430348012_LCND
2019-05-2292430332003_LCND
2019-05-2292430332004_LCND
2019-05-2292430332005_LCND
2019-05-2292430332007_LCND
2019-05-2292430332009_LCND
2019-05-2292430332010_LCND
2019-05-2292430332011_LCND
2019-05-2292430332012_LCND
2019-05-2292430348001_LCND
2019-05-2292430348003_LCND
2019-05-2292430348004_LCND
2019-05-2292430348005_LCND
2019-05-2292430348007_LCND
2019-05-2292430348008_LCND
2019-05-2292430348009_LCND
2019-05-2292430348010_LCND
2019-05-2292430348011_LCND
2019-05-2292430353001_LCND
2019-05-2292430353002_LCND
2019-05-2292430353003_LCND
2019-05-2292430353004_LCND
2019-05-2292430353005_LCND
2019-05-2292430353006_LCND
2019-05-2292430353007_LCND
2019-05-2292430353008_LCND
2019-05-2292430353009_LCND
2019-05-2292430353010_LCND
2019-05-2292430353011_LCND
2019-05-2292430353012_LCND
2019-05-2292430693003_LCND
2019-05-2292430693004_LCND
2019-05-2292430693005_LCND
2019-05-2292431320009_LCND
2019-05-2392430690005_LCND
2019-05-2392430693002_LCND
2019-05-2492430690001_LCND
2019-05-2492430690002_LCND
2019-05-2492430690003_LCND
2019-05-2492430690004_LCND
2019-05-2792431320002_LCND
2019-05-2792431320005_LCND
2019-05-2992431320001_LCND
2019-05-2992431320003_LCND
2019-05-2992431320004_LCND
2019-05-3192431320006_LCND
2019-05-3192431320007_LCND
2019-05-3192431320008_LCND
2019-06-0492431730001_LCND
2019-06-0592432420001_LCND
2019-06-0592432420002_LCND
2019-06-0692432420003_LCND
2019-06-0692432420005_LCND
2019-06-0792432420004_LCND
2019-08-2792443218001_METND
2019-10-2292451119001_LCND
2019-10-2292451119014_LCND
2019-10-2292451119017_LCND
2019-10-2292451536022_LCND
2019-10-2392451119002_LCND
2019-10-2392451119003_LCND
2019-10-2392451119004_LCND
2019-10-2392451119005_LCND
2019-10-2392451119006_LCND
2019-10-2392451119007_LCND
2019-10-2392451119008_LCND
2019-10-2392451119009_LCND
2019-10-2392451119010_LCND
2019-10-2392451119011_LCND
2019-10-2392451119012_LCND
2019-10-2392451119013_LCND
2019-10-2392451119015_LCND
2019-10-2392451119016_LCND
2019-10-2392451119018_LCND
2019-10-2392451119019_LCND
2019-10-2392451119020_LCND
2019-10-2392451119021_LCND
2019-10-2392451119022_LCND
2019-10-2392451119023_LCND
2019-10-2392451119024_LCND
2019-10-2392451119025_LCND
2019-10-2392451119026_LCND
2019-10-2392451119027_LCND
2019-10-2392451119028_LCND
2019-10-2392451119029_LCND
2019-10-2392451119030_LCND
2019-10-2392451536004_LCND
2019-10-2392451536007_LCND
2019-10-2392451536013_LCND
2019-10-2392451536015_LCND
2019-10-2392451536016_LCND
2019-10-2392451536017_LCND
2019-10-2392451536018_LCND
2019-10-2492451536001_LCND
2019-10-2492451536002_LCND
2019-10-2492451536003_LCND
2019-10-2492451536008_LCND
2019-10-2492451536009_LCND
2019-10-2492451536010_LCND
2019-10-2492451536011_LCND
2019-10-2492451536012_LCND
2019-10-2492451536014_LCND
2019-10-2492451536019_LCND
2019-10-2492451536020_LCND
2019-10-2492451536021_LCND
2019-10-2492451536023_LCND
2019-10-2492451536024_LCND
2019-10-2492451536026_LCND
2019-10-2492451536029_LCND
2019-10-2592451536005_LCND
2019-10-2592451536025_LCND
2019-10-2592451536028_LCND
2019-10-2592451536030_LCND
2019-10-2692451536006_LCND
2019-10-2992451924001_LCND
2019-10-3092451924002_LCND
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Read more about lead here.