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Tap water quality report

Sheridan, WY

EPA monitoring detected 11 contaminants across the 3 water suppliers serving Sheridan. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

3
water suppliers
23,785
people served
11
contaminants found
Wyoming rankings Lead in Wyoming PFAS in Wyoming

What was found in Sheridan'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.

ContaminantLevel vs EPA limitSuppliersSource
Fluoride
800 µg/L 20%
of the EPA limit 4000 µg/L
Main supplier: SHERIDAN, CITY OF · 22,700 people · 2019
1/3 SYR4
Copper
233 µg/L 18%
of the EPA limit 1300 µg/L
Main supplier: SHERIDAN, CITY OF · 22,700 people · 2017
Highest in the city: 515.5 µg/L — VETERANS ADMINISTRATION MEDICAL CENTER · 685 people · 2018
3/3 SYR4
Total Haloacetic Acids (HAA5)
67.1 µg/L 112%
of the EPA limit, at the 95th percentile of samples — 60 µg/L
Main supplier: SHERIDAN, CITY OF · 22,700 people · 2019
Highest in the city: 100.65 µg/L — VETERANS ADMINISTRATION MEDICAL CENTER · 685 people · 2019
3/3 SYR4
Nitrate-Nitrite
100 µg/L 1%
of the EPA limit 10000 µg/L
Main supplier: SHERIDAN, CITY OF · 22,700 people · 2019
2/3 SYR4
TTHM
84.7 µg/L 106%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: SHERIDAN, CITY OF · 22,700 people · 2019
Highest in the city: 85.15 µg/L — VETERANS ADMINISTRATION MEDICAL CENTER · 685 people · 2019
3/3 SYR4
Cyanide
80 µg/L 40%
of the EPA limit 200 µg/L
Main supplier: SHERIDAN, CITY OF · 22,700 people · 2019
2/3 SYR4
Endothall
29.5 µg/L 30%
of the EPA limit 100 µg/L
Highest in the city: VETERANS ADMINISTRATION MEDICAL CENTER · 685 people · 2018
1/3 SYR4
Lead
3 µg/L 20%
of the EPA limit 15 µg/L
Main supplier: SHERIDAN, CITY OF · 22,700 people · 2017
Highest in the city: 17.65 µg/L — VETERANS ADMINISTRATION MEDICAL CENTER · 685 people · 2018
2/3 SYR4
Ethylbenzene
0.9200 µg/L 0.1%
of the EPA limit 700 µg/L
Main supplier: SHERIDAN, CITY OF · 22,700 people · 2019
1/3 SYR4
Di(2-ethylhexyl) Phthalate
0.0520 µg/L 0.9%
of the EPA limit 6 µg/L
Highest in the city: VETERANS ADMINISTRATION MEDICAL CENTER · 685 people · 2017
1/3 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: SHERIDAN, CITY OF · 22,700 people · 2023
Highest in the city: 0.0100 mg/L — VETERANS ADMINISTRATION MEDICAL CENTER · 685 people · 2025
3/3 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 Sheridan

SupplierPopulation served
SHERIDAN, CITY OF 22,700
VETERANS ADMINISTRATION MEDICAL CENTER 685
DOWNER NEIGHBORHOOD I&S DISTRICT 400

Frequently asked questions about Sheridan tap water

Is Sheridan tap water safe to drink?

EPA testing detected 11 contaminants in the water serving Sheridan. 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 Sheridan?

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

What contaminants are in Sheridan's water?

The contaminants EPA monitoring detected in Sheridan include Fluoride, Copper, Total Haloacetic Acids (HAA5), Nitrate-Nitrite, TTHM. 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.