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Tap water quality report

Ammon, ID

EPA monitoring detected 14 contaminants across the 1 water supplier serving Ammon. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

1
water supplier
17,338
people served
14
contaminants found
Idaho rankings Lead in Idaho PFAS in Idaho

What was found in Ammon's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
3080 µg/L 31%
of the EPA limit 10000 µg/L
 1/1 SYR4
Nitrate-Nitrite
3050 µg/L 31%
of the EPA limit 10000 µg/L
 1/1 SYR4
Fluoride
400 µg/L 10%
of the EPA limit 4000 µg/L
 1/1 SYR4
Barium
154 µg/L 7.7%
of the EPA limit 2000 µg/L
 1/1 SYR4
Lithium
47.1 µg/L
No EPA limit set
 1/1 UCMR-5
Gross Alpha, Excl. Radon And U
5.5 pCi/L 37%
of the EPA limit 15 pCi/L
 1/1 SYR4
Combined Radium (-226 And -228)
4.9 pCi/L 98%
of the EPA limit 5 pCi/L
 1/1 SYR4
Combined Uranium
3.6 µg/L 12%
of the EPA limit 30 µg/L
 1/1 SYR4
Di(2-ethylhexyl) Phthalate
2.19 µg/L 37%
of the EPA limit 6 µg/L
 1/1 SYR4
Arsenic
2 µg/L 20%
of the EPA limit 10 µg/L
 1/1 SYR4
Chromium
2 µg/L 2%
of the EPA limit 100 µg/L
 1/1 SYR4
Selenium
2 µg/L 4%
of the EPA limit 50 µg/L
 1/1 SYR4
Dichloromethane
1.06 µg/L 21%
of the EPA limit 5 µg/L
 1/1 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 1/1 LCR
Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Ammon

SupplierPopulation served
AMMON CITY OF 17,338

Frequently asked questions about Ammon tap water

Is Ammon tap water safe to drink?

EPA testing detected 14 contaminants in the water serving Ammon. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Ammon?

1 public water supplier report drinking-water monitoring for Ammon, Idaho to the EPA. Each is listed above with its population served.

What contaminants are in Ammon's water?

The contaminants EPA monitoring detected in Ammon include Nitrate, Nitrate-Nitrite, Fluoride, Barium, Lithium. The full list, with the highest level found and the data source, is in the table above.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.