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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.

SupplierCityStateLevel vs EPA limit
Silver Creek Village Wsc Burnet TX
778 pCi/L 5187%
of the EPA limit, in the worst sample — 15 pCi/L
Council Creek Village Des Peres MO
181.8 pCi/L 1212%
of the EPA limit, in the worst sample — 15 pCi/L
Rolling Acres Mhp Mont Vernon NY
170 pCi/L 1133%
of the EPA limit, in the worst sample — 15 pCi/L
Arbor Hills Water Works Lewisboro NY
153 pCi/L 1020%
of the EPA limit, in the worst sample — 15 pCi/L
East Ridge Mobile Home Park Waldoboro ME
122 pCi/L 813%
of the EPA limit, in the worst sample — 15 pCi/L
South Council Creek 2 Des Peres MO
118 pCi/L 787%
of the EPA limit, in the worst sample — 15 pCi/L
Millersview Doole Wsc Millersview TX
116 pCi/L 773%
of the EPA limit, in the worst sample — 15 pCi/L
Tanglewood Forest Subdivision Cypress TX
110 pCi/L 733%
of the EPA limit, in the worst sample — 15 pCi/L
Kensington Place S/D Oak Ridge AL
109 pCi/L 727%
of the EPA limit, in the worst sample — 15 pCi/L
Rockbridge S/D Knightdale NC
108 pCi/L 720%
of the EPA limit, in the worst sample — 15 pCi/L
Annunciation Heights Estes Park CO
100.27 pCi/L 668%
of the EPA limit, in the worst sample — 15 pCi/L
Poland Place Condo Association Poland ME
96.9 pCi/L 646%
of the EPA limit, in the worst sample — 15 pCi/L
Edelstein Water Coop East Peoria IL
96.6 pCi/L 644%
of the EPA limit, in the worst sample — 15 pCi/L
Sonoita Valley (South) Water Company Sonoita AZ
93 pCi/L 620%
of the EPA limit, in the worst sample — 15 pCi/L
Perry County Pwsd 1 Perryville MO
90.5 pCi/L 603%
of the EPA limit, in the worst sample — 15 pCi/L
May Valley Wa Wiley CO
85 pCi/L 567%
of the EPA limit, in the worst sample — 15 pCi/L
Tow Water System Austin TX
82.8 pCi/L 552%
of the EPA limit, in the worst sample — 15 pCi/L
Tempe Wsc 1 Livingston TX
75.6 pCi/L 504%
of the EPA limit, in the worst sample — 15 pCi/L
Perdido Bay Water Sewer & Fpd Elberta AL
74.3 pCi/L 495%
of the EPA limit, in the worst sample — 15 pCi/L
Vista Verde Water Systems Des Peres MO
74 pCi/L 493%
of the EPA limit, in the worst sample — 15 pCi/L
Apache Apache OK
72.7 pCi/L 485%
of the EPA limit, in the worst sample — 15 pCi/L
Bayshore Mobile Home Park Stow Creek twp.-0612 NJ
71.83 pCi/L 479%
of the EPA limit, in the worst sample — 15 pCi/L
Tryon Tryon OK
71.8 pCi/L 479%
of the EPA limit, in the worst sample — 15 pCi/L
Evansville Waterworks — —
70.52 pCi/L 470%
of the EPA limit, in the worst sample — 15 pCi/L
Cassandra Hills Owners Assn St Maries ID
68.3 pCi/L 455%
of the EPA limit, in the worst sample — 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.