EWG's Tap Water Database — 2019 UPDATE



East Bay Municipal Utility District

Strontium is a metal that accumulates in the bones. Radioactive strontium-90 can cause bone cancer and leukemia, and any form of strontium at high doses can harm bone health.





Samples exceeding legal limit (MCL)


Samples exceeding
health guidelines

Testing results - average by year

YearAverage resultSamples takenDetectionsRange of results
201373.6 ppb8835.0 ppb - 190.0 ppb
201490.1 ppb282831.0 ppb - 320.0 ppb
2015245.0 ppb22180.0 ppb - 310.0 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 1,500 ppb

The EWG Health Guideline of 1,500 ppb for strontium was defined by the Environmental Protection Agency as a benchmark for testing under the Unregulated Contaminant Monitoring Rule program. This health guideline protects against harm to bones.

ppb = parts per billion

All test results

Date Lab ID Result
2013-10-09B3J1229-04180.0 ppb
2013-10-09B3J1237-03190.0 ppb
2013-10-09B3J1237-0737.0 ppb
2013-10-09B3J1237-0136.0 ppb
2013-10-09B3J1237-0540.0 ppb
2013-10-09B3J1229-0736.0 ppb
2013-10-09B3J1229-1035.0 ppb
2013-10-09B3J1229-0135.0 ppb
2014-01-08B4A0937-0533.0 ppb
2014-01-08B4A0937-0832.0 ppb
2014-01-08B4A0937-0332.0 ppb
2014-01-08B4A0937-0131.0 ppb
2014-02-25B4B2486-0438.0 ppb
2014-02-25B4B2486-0142.0 ppb
2014-04-09B4D1270-07320.0 ppb
2014-04-09B4D1270-0144.0 ppb
2014-04-09B4D1270-1044.0 ppb
2014-04-09B4D1270-1541.0 ppb
2014-04-09B4D1270-1944.0 ppb
2014-04-09B4D1270-1344.0 ppb
2014-04-09B4D1270-1745.0 ppb
2014-04-09B4D1270-0441.0 ppb
2014-04-29B4E0018-01140.0 ppb
2014-04-29B4E0018-0452.0 ppb
2014-07-09B4G1290-01110.0 ppb
2014-07-09B4G1269-0138.0 ppb
2014-07-09B4G1278-01140.0 ppb
2014-07-09B4G1282-0136.0 ppb
2014-07-09B4G1285-01110.0 ppb
2014-07-09B4G1292-0137.0 ppb
2014-07-09B4G1293-01140.0 ppb
2014-07-09B4G1291-01100.0 ppb
2014-07-16B4G1982-04130.0 ppb
2014-07-16B4G1982-01250.0 ppb
2014-10-09B4J1130-01250.0 ppb
2014-10-09B4J1130-04160.0 ppb
2015-01-07B5A0784-04180.0 ppb
2015-01-07B5A0784-01310.0 ppb