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Tap water quality report

Rock Springs, WY

EPA monitoring detected 14 contaminants across the 12 water suppliers serving Rock Springs. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

12
water suppliers
30,723
people served
14
contaminants found
Wyoming rankings Lead in Wyoming PFAS in Wyoming

What was found in Rock Springs'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
Copper
2150 µg/L 165%
of the EPA limit, in the worst sample — 1300 µg/L
 11/12 SYR4
TTHM
73 µg/L 91%
of the EPA limit 80 µg/L
 11/12 SYR4
Chloroform
67 µg/L
No EPA limit set
 10/12 SYR4
Total Haloacetic Acids (HAA5)
47 µg/L 78%
of the EPA limit 60 µg/L
 11/12 SYR4
Lead
36 µg/L 240%
of the EPA limit, in the worst sample — 15 µg/L
 11/12 SYR4
Dichloroacetic Acid
25 µg/L
No EPA limit set
 10/12 SYR4
Trichloroacetic Acid
24 µg/L
No EPA limit set
 10/12 SYR4
Bromodichloromethane
13 µg/L
No EPA limit set
 10/12 SYR4
Dibromochloromethane
4.3 µg/L
No EPA limit set
 10/12 SYR4
Monochloroacetic Acid
2.4 µg/L
No EPA limit set
 10/12 SYR4
Dibromoacetic Acid
1.3 µg/L
No EPA limit set
 10/12 SYR4
Monobromoacetic Acid
0.8600 µg/L
No EPA limit set
 4/12 SYR4
Bromoform
0.7500 µg/L
No EPA limit set
 1/12 SYR4
Lead
0.0140 mg/L 93%
of the EPA limit 0.0150 mg/L
 12/12 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 Rock Springs

SupplierPopulation served
ROCK SPRINGS, CITY OF 24,000
WHITE MOUNTAIN W&S DISTRICT 3,000
CLEARVIEW I&S DISTRICT 930
SKYLINE VILLAGE MOBILE HOME PK 700
WESTERN HILLS MHP 450
LEWIS MOBILE HOME PARK 370
HORIZON MHP 330
TEN MILE WATER AND SEWER DISTRICT 305
WHITE MOUNTAIN MOBILE HOME PARK 270
GARCIA MOBILE HOME PARK 148
W BAR K MOBILE HOME PARK 110
MOBILE CORRALS MHP 110

Frequently asked questions about Rock Springs tap water

Is Rock Springs tap water safe to drink?

EPA testing detected 14 contaminants in the water serving Rock Springs. 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 Rock Springs?

12 public water suppliers report drinking-water monitoring for Rock Springs, Wyoming to the EPA. Each is listed above with its population served.

What contaminants are in Rock Springs's water?

The contaminants EPA monitoring detected in Rock Springs include Copper, TTHM, Chloroform, Total Haloacetic Acids (HAA5), Lead. 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.