Is Jerome, ID Tap Water Safe? Quality & Contaminants

What was found in Jerome's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

Contaminant	Level vs EPA limit	Suppliers	Source
Nitrate	2570 µg/L 26% of the EPA limit 10000 µg/L Main supplier: JEROME CITY OF · 13,135 people · 2019	4/4	SYR4
Nitrate-Nitrite	2320 µg/L 23% of the EPA limit 10000 µg/L Highest in the city: COUNTRY CLUB ESTATES · 137 people · 2012	2/4	SYR4
Fluoride	660 µg/L 17% of the EPA limit 4000 µg/L Main supplier: JEROME CITY OF · 13,135 people · 2012 Highest in the city: 710 µg/L — NORTH RIM FAIRWAYS · 150 people · 2018	3/4	SYR4
Barium	61.77 µg/L 3.1% of the EPA limit 2000 µg/L Main supplier: JEROME CITY OF · 13,135 people · 2012 Highest in the city: 220 µg/L — NORTH RIM FAIRWAYS · 150 people · 2018	4/4	SYR4
Lithium	60 µg/L No EPA limit set Main supplier: JEROME CITY OF · 13,135 people · 2024	1/4	UCMR-5
TTHM	17.075 µg/L 21% of the EPA limit 80 µg/L Main supplier: JEROME CITY OF · 13,135 people · 2019	3/4	SYR4
Arsenic	4 µg/L 40% of the EPA limit 10 µg/L Highest in the city: NORTH RIM FAIRWAYS · 150 people · 2018	3/4	SYR4
Combined Uranium	2.795 µg/L 9.3% of the EPA limit 30 µg/L Main supplier: JEROME CITY OF · 13,135 people · 2012 Highest in the city: 3 µg/L — UNIT 3 WATER ASSN · 350 people · 2016	4/4	SYR4
Total Haloacetic Acids (HAA5)	2.725 µg/L 4.5% of the EPA limit 60 µg/L Main supplier: JEROME CITY OF · 13,135 people · 2019	2/4	SYR4
Chromium	1.495 µg/L 1.5% of the EPA limit 100 µg/L Main supplier: JEROME CITY OF · 13,135 people · 2012	1/4	SYR4
Combined Radium (-226 And -228)	1.285 pCi/L 26% of the EPA limit 5 pCi/L Main supplier: JEROME CITY OF · 13,135 people · 2012	2/4	SYR4
Lead	0.0030 mg/L 20% of the EPA limit 0.0150 mg/L Main supplier: JEROME CITY OF · 13,135 people · 2025 Highest in the city: 0.0060 mg/L — COUNTRY CLUB ESTATES · 137 people · 2022	4/4	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 95th percentile of the system's samples — 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 Jerome

Supplier	Population served
JEROME CITY OF	13,135
UNIT 3 WATER ASSN	350
NORTH RIM FAIRWAYS	150
COUNTRY CLUB ESTATES	137

Frequently asked questions about Jerome tap water

Is Jerome tap water safe to drink?

EPA testing detected 12 contaminants in the water serving Jerome. 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 Jerome?

4 public water suppliers report drinking-water monitoring for Jerome, Idaho to the EPA. Each is listed above with its population served.

What contaminants are in Jerome's water?

The contaminants EPA monitoring detected in Jerome include Nitrate, Nitrate-Nitrite, Fluoride, Barium, Lithium. The full list, with the level at the main supplier 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.