Is Shelley, ID Tap Water Safe? Quality & Contaminants

What was found in Shelley'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	5017.5 µg/L 50% of the EPA limit 10000 µg/L Main supplier: SHELLEY CITY OF · 4,409 people · 2019	6/6	SYR4
Nitrate-Nitrite	4166 µg/L 42% of the EPA limit 10000 µg/L Main supplier: SHELLEY CITY OF · 4,409 people · 2018	5/6	SYR4
Fluoride	675 µg/L 17% of the EPA limit 4000 µg/L Main supplier: SHELLEY CITY OF · 4,409 people · 2018 Highest in the city: 700 µg/L — JOURNEYS END · 180 people · 2019	6/6	SYR4
Barium	153.25 µg/L 7.7% of the EPA limit 2000 µg/L Main supplier: SHELLEY CITY OF · 4,409 people · 2018	6/6	SYR4
Lithium	74.5 µg/L No EPA limit set Main supplier: SHELLEY CITY OF · 4,409 people · 2023	1/6	UCMR-5
Chromium	7.95 µg/L 8% of the EPA limit 100 µg/L Main supplier: SHELLEY CITY OF · 4,409 people · 2018	3/6	SYR4
Gross Alpha, Excl. Radon And U	5.731 pCi/L 38% of the EPA limit 15 pCi/L Main supplier: SHELLEY CITY OF · 4,409 people · 2019	4/6	SYR4
Combined Uranium	2.3585 µg/L 7.9% of the EPA limit 30 µg/L Main supplier: SHELLEY CITY OF · 4,409 people · 2019 Highest in the city: 3.298 µg/L — GREENFIELD WATER AND SEWER · 240 people · 2019	6/6	SYR4
Arsenic	2 µg/L 20% of the EPA limit 10 µg/L Main supplier: SHELLEY CITY OF · 4,409 people · 2018 Highest in the city: 3 µg/L — GREENFIELD WATER AND SEWER · 240 people · 2019	6/6	SYR4
Selenium	2 µg/L 4% of the EPA limit 50 µg/L Main supplier: SHELLEY CITY OF · 4,409 people · 2018	3/6	SYR4
Combined Radium (-226 And -228)	0.9518 pCi/L 19% of the EPA limit 5 pCi/L Main supplier: SHELLEY CITY OF · 4,409 people · 2019 Highest in the city: 1.9 pCi/L — GREENFIELD WATER AND SEWER · 240 people · 2016	6/6	SYR4
TTHM	1.08 µg/L 1.4% of the EPA limit 80 µg/L Highest in the city: CEDAR POINT SUBDIVISION · 63 people · 2016	1/6	SYR4
Toluene	0.7490 µg/L 0.1% of the EPA limit 1000 µg/L Main supplier: SHELLEY CITY OF · 4,409 people · 2019	1/6	SYR4
Dibromochloromethane	0.5500 µg/L No EPA limit set Highest in the city: CEDAR POINT SUBDIVISION · 63 people · 2016	1/6	SYR4
Chloroform	0.5300 µg/L No EPA limit set Highest in the city: CEDAR POINT SUBDIVISION · 63 people · 2016	1/6	SYR4
Picloram	0.1380 µg/L 0% of the EPA limit 500 µg/L Highest in the city: WOODVILLE · 225 people · 2019	1/6	SYR4
Lead	0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L Main supplier: SHELLEY CITY OF · 4,409 people · 2023 Highest in the city: 0.0030 mg/L — WOODVILLE · 225 people · 2024	6/6	LCR
PFBS	0.0030 µg/L No EPA limit set Main supplier: SHELLEY CITY OF · 4,409 people · 2023	1/6	UCMR-5

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 Shelley

Supplier	Population served
SHELLEY CITY OF	4,409
GREENFIELD WATER AND SEWER	240
WOODVILLE	225
JOURNEYS END	180
SOUTH PARK WATER AND SEWER	125
CEDAR POINT SUBDIVISION	63

Frequently asked questions about Shelley tap water

Is Shelley tap water safe to drink?

EPA testing detected 18 contaminants in the water serving Shelley. 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 Shelley?

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

What contaminants are in Shelley's water?

The contaminants EPA monitoring detected in Shelley 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.