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Tap water quality report

Wister, OK

EPA monitoring detected 16 contaminants across the 3 water suppliers serving Wister. 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
4,882
people served
16
contaminants found
Oklahoma rankings Lead in Oklahoma PFAS in Oklahoma

What was found in Wister'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
747.5 µg/L 19%
of the EPA limit 4000 µg/L
Highest in the city: POTEAU VALLEY IMPROVEMENT AUTHORITY · 10 people · 2019
1/3 SYR4
Copper
201.9 µg/L 16%
of the EPA limit 1300 µg/L
Main supplier: LEFLORE CO. RWD #18 · 3,870 people · 2018
Highest in the city: 727.7 µg/L — WISTER · 1,002 people · 2019
3/3 SYR4
Lead
331.65 µg/L 2211%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Highest in the city: WISTER · 1,002 people · 2019
2/3 SYR4
Nitrate-Nitrite
150 µg/L 1.5%
of the EPA limit 10000 µg/L
Highest in the city: POTEAU VALLEY IMPROVEMENT AUTHORITY · 10 people · 2019
1/3 SYR4
TTHM
118.7 µg/L 148%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: LEFLORE CO. RWD #18 · 3,870 people · 2019
Highest in the city: 147 µg/L — POTEAU VALLEY IMPROVEMENT AUTHORITY · 10 people · 2019
3/3 SYR4
Chloroform
104.85 µg/L
No EPA limit set
Main supplier: LEFLORE CO. RWD #18 · 3,870 people · 2019
Highest in the city: 124.9 µg/L — POTEAU VALLEY IMPROVEMENT AUTHORITY · 10 people · 2019
3/3 SYR4
Total Haloacetic Acids (HAA5)
77.52 µg/L 129%
of the EPA limit, at the 95th percentile of samples — 60 µg/L
Main supplier: LEFLORE CO. RWD #18 · 3,870 people · 2019
3/3 SYR4
Dichloroacetic Acid
41.98 µg/L
No EPA limit set
Main supplier: LEFLORE CO. RWD #18 · 3,870 people · 2019
3/3 SYR4
Trichloroacetic Acid
30.525 µg/L
No EPA limit set
Main supplier: LEFLORE CO. RWD #18 · 3,870 people · 2019
3/3 SYR4
Bromodichloromethane
11.8 µg/L
No EPA limit set
Main supplier: LEFLORE CO. RWD #18 · 3,870 people · 2019
Highest in the city: 14.945 µg/L — POTEAU VALLEY IMPROVEMENT AUTHORITY · 10 people · 2019
3/3 SYR4
Barium
13.7 µg/L 0.7%
of the EPA limit 2000 µg/L
Highest in the city: POTEAU VALLEY IMPROVEMENT AUTHORITY · 10 people · 2012
1/3 SYR4
Monochloroacetic Acid
8.808 µg/L
No EPA limit set
Main supplier: LEFLORE CO. RWD #18 · 3,870 people · 2019
Highest in the city: 8.865 µg/L — POTEAU VALLEY IMPROVEMENT AUTHORITY · 10 people · 2019
3/3 SYR4
Dibromochloromethane
2.9135 µg/L
No EPA limit set
Main supplier: LEFLORE CO. RWD #18 · 3,870 people · 2019
Highest in the city: 3.958 µg/L — POTEAU VALLEY IMPROVEMENT AUTHORITY · 10 people · 2019
3/3 SYR4
Dibromoacetic Acid
1.364 µg/L
No EPA limit set
Main supplier: LEFLORE CO. RWD #18 · 3,870 people · 2019
Highest in the city: 2.988 µg/L — POTEAU VALLEY IMPROVEMENT AUTHORITY · 10 people · 2019
3/3 SYR4
Gross Beta Particle Activity
1.07 pCi/L
No EPA limit set
Highest in the city: POTEAU VALLEY IMPROVEMENT AUTHORITY · 10 people · 2019
1/3 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: LEFLORE CO. RWD #18 · 3,870 people · 2023
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 Wister

SupplierPopulation served
LEFLORE CO. RWD #18 3,870
WISTER 1,002
POTEAU VALLEY IMPROVEMENT AUTHORITY 10

Frequently asked questions about Wister tap water

Is Wister tap water safe to drink?

EPA testing detected 16 contaminants in the water serving Wister. 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 Wister?

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

What contaminants are in Wister's water?

The contaminants EPA monitoring detected in Wister include Fluoride, Copper, Lead, 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.