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Contaminant guide

Gross Alpha, Excl. Radon And U in drinking water

The EPA limit for Gross Alpha, Excl. Radon And U in drinking water is 15 pCi/L. Of the 16,215 water suppliers tested, 9,273 had it detected.

15 pCi/L
EPA limit (MCL)
57.2%
of suppliers detected it
(9,273/16,215)

What Gross Alpha, Excl. Radon And U is, and why it's regulated

Gross alpha activity measures naturally occurring radioactive particles in groundwater; long-term exposure raises cancer risk.

What the EPA limit means

⚖️

15 pCi/L

Maximum Contaminant Level — the enforceable ceiling a supplier must stay under.

🎯

0.0 pCi/L

Health goal (MCLG) — the level with no known health effect. It is a goal, not a legal limit, and is often zero for carcinogens.

🧪

SYR4

Where these measurements come from. Hover the tag for the EPA programme and years.

Where Gross Alpha, Excl. Radon And U was found

The water suppliers reporting the highest levels, worst first. For lead and copper that is the 90th-percentile result the action level is written against; for Six-Year Review data, the 95th percentile of each system's samples.

SupplierCityStateLevel vs EPA limit
Silver Creek Village Wsc Burnet TX
478 pCi/L 3187%
of the EPA limit, at the 95th percentile of samples — 15 pCi/L
Council Creek Village — MO
136.9 pCi/L 913%
of the EPA limit, at the 95th percentile of samples — 15 pCi/L
South Council Creek 2 — MO
110.4 pCi/L 736%
of the EPA limit, at the 95th percentile of samples — 15 pCi/L
Tanglewood Forest Subdivision — TX
110 pCi/L 733%
of the EPA limit, at the 95th percentile of samples — 15 pCi/L
Millersview Doole Wsc Millersview TX
109.75 pCi/L 732%
of the EPA limit, at the 95th percentile of samples — 15 pCi/L
Kensington Place S/D Oak Ridge AL
103.662 pCi/L 691%
of the EPA limit, at the 95th percentile of samples — 15 pCi/L
Annunciation Heights Estes Park CO
99.381 pCi/L 663%
of the EPA limit, at the 95th percentile of samples — 15 pCi/L
Rolling Acres Mhp Mont Vernon NY
96.6 pCi/L 644%
of the EPA limit, at the 95th percentile of samples — 15 pCi/L
Rockbridge S/D Knightdale NC
87.04 pCi/L 580%
of the EPA limit, at the 95th percentile of samples — 15 pCi/L
Edelstein Water Coop — IL
82.6 pCi/L 551%
of the EPA limit, at the 95th percentile of samples — 15 pCi/L
Tow Water System — TX
81.675 pCi/L 544%
of the EPA limit, at the 95th percentile of samples — 15 pCi/L
Perry County Pwsd 1 Perryville MO
80.38 pCi/L 536%
of the EPA limit, at the 95th percentile of samples — 15 pCi/L
Tempe Wsc 1 Livingston TX
69.91 pCi/L 466%
of the EPA limit, at the 95th percentile of samples — 15 pCi/L
Bayshore Mobile Home Park Stow Creek twp.-0612 NJ
69.1725 pCi/L 461%
of the EPA limit, at the 95th percentile of samples — 15 pCi/L
Poland Place Condo Association Poland ME
64.505 pCi/L 430%
of the EPA limit, at the 95th percentile of samples — 15 pCi/L
Hunters Ridge Subd Farmington MO
64.5 pCi/L 430%
of the EPA limit, at the 95th percentile of samples — 15 pCi/L
East Ridge Mobile Home Park Waldoboro ME
63.63 pCi/L 424%
of the EPA limit, at the 95th percentile of samples — 15 pCi/L
Four Star Campground Marseilles IL
62.8 pCi/L 419%
of the EPA limit, at the 95th percentile of samples — 15 pCi/L
Chanticor Series — TX
59.965 pCi/L 400%
of the EPA limit, at the 95th percentile of samples — 15 pCi/L
Perdido Bay Water Sewer & Fpd Elberta AL
57.65 pCi/L 384%
of the EPA limit, at the 95th percentile of samples — 15 pCi/L
Boumil Grove Condos Londonderry MA
55.24 pCi/L 368%
of the EPA limit, at the 95th percentile of samples — 15 pCi/L
Bridgton Water District Bridgton ME
53.58 pCi/L 357%
of the EPA limit, at the 95th percentile of samples — 15 pCi/L
City of Alexandria Water System Alexandria LA
53.23 pCi/L 355%
of the EPA limit, at the 95th percentile of samples — 15 pCi/L
Canton Point Park Canton ME
52.18 pCi/L 348%
of the EPA limit, at the 95th percentile of samples — 15 pCi/L
Woodhall School, Inc Bethlehem CT
51.455 pCi/L 343%
of the EPA limit, at the 95th percentile of samples — 15 pCi/L

Frequently asked questions about Gross Alpha, Excl. Radon And U

What is Gross Alpha, Excl. Radon And U in drinking water?

Gross alpha activity measures naturally occurring radioactive particles in groundwater; long-term exposure raises cancer risk.

What is the EPA limit for Gross Alpha, Excl. Radon And U?

The EPA's Maximum Contaminant Level for Gross Alpha, Excl. Radon And U is 15 pCi/L, and its health goal (MCLG) is 0.0 pCi/L. A result above the limit means the supplier must act; the goal is the level at which no health effects are expected.

How common is Gross Alpha, Excl. Radon And U in US tap water?

Of the 16,215 water suppliers with results on file, 9,273 detected Gross Alpha, Excl. Radon And U — 57.2% of those tested.