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Tap water quality report

Mills, WY

EPA monitoring detected 21 contaminants across the 9 water suppliers serving Mills. 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.

9
water suppliers
10,403
people served
21
contaminants found
Wyoming rankings Lead in Wyoming PFAS in Wyoming

What was found in Mills'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
Nitrate-Nitrite
1130 µg/L 11%
of the EPA limit 10000 µg/L
Main supplier: MILLS, CITY OF · 4,050 people · 2019
Highest in the city: 2400 µg/L — COUNTRYSIDE COURT · 125 people · 2019
2/9 SYR4
Copper
432.5 µg/L 33%
of the EPA limit 1300 µg/L
Main supplier: MILLS, CITY OF · 4,050 people · 2019
Highest in the city: 1215 µg/L — LAKEVIEW I&S DISTRICT · 62 people · 2019
9/9 SYR4
Fluoride
400 µg/L 10%
of the EPA limit 4000 µg/L
Main supplier: MILLS, CITY OF · 4,050 people · 2019
2/9 SYR4
TTHM
97.25 µg/L 122%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: MILLS, CITY OF · 4,050 people · 2019
1/9 SYR4
Total Haloacetic Acids (HAA5)
34.16 µg/L 57%
of the EPA limit 60 µg/L
Main supplier: MILLS, CITY OF · 4,050 people · 2019
1/9 SYR4
Chloroform
28.05 µg/L
No EPA limit set
Main supplier: MILLS, CITY OF · 4,050 people · 2019
1/9 SYR4
Bromodichloromethane
28 µg/L
No EPA limit set
Main supplier: MILLS, CITY OF · 4,050 people · 2019
1/9 SYR4
Dibromochloromethane
23.2 µg/L
No EPA limit set
Main supplier: MILLS, CITY OF · 4,050 people · 2019
1/9 SYR4
Trichloroacetic Acid
17.4 µg/L
No EPA limit set
Main supplier: MILLS, CITY OF · 4,050 people · 2019
1/9 SYR4
Combined Uranium
16.3971 µg/L 55%
of the EPA limit 30 µg/L
Highest in the city: COUNTRYSIDE COURT · 125 people · 2019
1/9 SYR4
Dichloroacetic Acid
13.25 µg/L
No EPA limit set
Main supplier: MILLS, CITY OF · 4,050 people · 2019
1/9 SYR4
Gross Alpha, Excl. Radon And U
10.7 pCi/L 71%
of the EPA limit 15 pCi/L
Main supplier: MILLS, CITY OF · 4,050 people · 2013
2/9 SYR4
Selenium
9.6 µg/L 19%
of the EPA limit 50 µg/L
Main supplier: MILLS, CITY OF · 4,050 people · 2019
2/9 SYR4
Lead
4.85 µg/L 32%
of the EPA limit 15 µg/L
Main supplier: MILLS, CITY OF · 4,050 people · 2019
Highest in the city: 7.1 µg/L — PIONEER WATER & SEWER DISTRICT · 1,500 people · 2019
8/9 SYR4
Dibromoacetic Acid
6.11 µg/L
No EPA limit set
Main supplier: MILLS, CITY OF · 4,050 people · 2019
1/9 SYR4
Bromoform
5.675 µg/L
No EPA limit set
Main supplier: MILLS, CITY OF · 4,050 people · 2019
1/9 SYR4
Arsenic
5 µg/L 50%
of the EPA limit 10 µg/L
Main supplier: MILLS, CITY OF · 4,050 people · 2019
2/9 SYR4
Monochloroacetic Acid
3.525 µg/L
No EPA limit set
Main supplier: MILLS, CITY OF · 4,050 people · 2019
1/9 SYR4
Monobromoacetic Acid
1.46 µg/L
No EPA limit set
Main supplier: MILLS, CITY OF · 4,050 people · 2019
1/9 SYR4
Combined Radium (-226 And -228)
0.5800 pCi/L 12%
of the EPA limit 5 pCi/L
Main supplier: MILLS, CITY OF · 4,050 people · 2014
2/9 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: MILLS, CITY OF · 4,050 people · 2025
Highest in the city: 0.0020 mg/L — PIONEER WATER & SEWER DISTRICT · 1,500 people · 2025
9/9 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 Mills

SupplierPopulation served
MILLS, CITY OF 4,050
BAR NUNN, TOWN OF 4,000
PIONEER WATER & SEWER DISTRICT 1,500
AIR BASE ACRES I&S DISTRICT 236
POISON SPIDER I&S DISTRICT 200
PLEASANT VIEW WATER COMPANY 130
COUNTRYSIDE COURT 125
THIRTY-THREE MILE ROAD I&S DISTRICT 100
LAKEVIEW I&S DISTRICT 62

Frequently asked questions about Mills tap water

Is Mills tap water safe to drink?

EPA testing detected 21 contaminants in the water serving Mills. 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 Mills?

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

What contaminants are in Mills's water?

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