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Tap water quality report

Welch, OK

EPA monitoring detected 17 contaminants across the 2 water suppliers serving Welch. 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.

2
water suppliers
1,900
people served
17
contaminants found
Oklahoma rankings Lead in Oklahoma PFAS in Oklahoma

What was found in Welch'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
9080 µg/L 91%
of the EPA limit 10000 µg/L
Main supplier: CRAIG CO RWS & SWMD #3 · 1,100 people · 2019
2/2 SYR4
Fluoride
1495 µg/L 37%
of the EPA limit 4000 µg/L
Main supplier: CRAIG CO RWS & SWMD #3 · 1,100 people · 2017
Highest in the city: 2360 µg/L — WELCH PWA · 800 people · 2014
2/2 SYR4
Copper
13.8 µg/L 1.1%
of the EPA limit 1300 µg/L
Main supplier: CRAIG CO RWS & SWMD #3 · 1,100 people · 2017
Highest in the city: 256.1 µg/L — WELCH PWA · 800 people · 2018
2/2 SYR4
Barium
121.625 µg/L 6.1%
of the EPA limit 2000 µg/L
Main supplier: CRAIG CO RWS & SWMD #3 · 1,100 people · 2017
Highest in the city: 179 µg/L — WELCH PWA · 800 people · 2014
2/2 SYR4
Gross Alpha, Excl. Radon And U
13.18 pCi/L 88%
of the EPA limit 15 pCi/L
Main supplier: CRAIG CO RWS & SWMD #3 · 1,100 people · 2018
Highest in the city: 23.34 pCi/L — WELCH PWA · 800 people · 2019
2/2 SYR4
Gross Beta Particle Activity
8.819 pCi/L
No EPA limit set
Main supplier: CRAIG CO RWS & SWMD #3 · 1,100 people · 2018
Highest in the city: 18.23 pCi/L — WELCH PWA · 800 people · 2019
2/2 SYR4
Combined Radium (-226 And -228)
5.94 pCi/L 119%
of the EPA limit, at the 95th percentile of samples — 5 pCi/L
Main supplier: CRAIG CO RWS & SWMD #3 · 1,100 people · 2018
Highest in the city: 11.188 pCi/L — WELCH PWA · 800 people · 2019
2/2 SYR4
TTHM
10.98 µg/L 14%
of the EPA limit 80 µg/L
Highest in the city: WELCH PWA · 800 people · 2019
1/2 SYR4
Bromoform
8.666 µg/L
No EPA limit set
Highest in the city: WELCH PWA · 800 people · 2019
1/2 SYR4
Selenium
7 µg/L 14%
of the EPA limit 50 µg/L
Main supplier: CRAIG CO RWS & SWMD #3 · 1,100 people · 2017
1/2 SYR4
Lead
5.1 µg/L 34%
of the EPA limit 15 µg/L
Highest in the city: WELCH PWA · 800 people · 2018
1/2 SYR4
Arsenic
2.5 µg/L 25%
of the EPA limit 10 µg/L
Highest in the city: WELCH PWA · 800 people · 2017
1/2 SYR4
Dibromochloromethane
2.2945 µg/L
No EPA limit set
Highest in the city: WELCH PWA · 800 people · 2019
1/2 SYR4
Monochloroacetic Acid
2.08 µg/L
No EPA limit set
Highest in the city: WELCH PWA · 800 people · 2019
1/2 SYR4
Total Haloacetic Acids (HAA5)
2.029 µg/L 3.4%
of the EPA limit 60 µg/L
Highest in the city: WELCH PWA · 800 people · 2019
1/2 SYR4
Dibromoacetic Acid
1.8 µg/L
No EPA limit set
Highest in the city: WELCH PWA · 800 people · 2019
1/2 SYR4
Lead
0.0052 mg/L 35%
of the EPA limit 0.0150 mg/L
Main supplier: CRAIG CO RWS & SWMD #3 · 1,100 people · 2023
2/2 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 Welch

SupplierPopulation served
CRAIG CO RWS & SWMD #3 1,100
WELCH PWA 800

Frequently asked questions about Welch tap water

Is Welch tap water safe to drink?

EPA testing detected 17 contaminants in the water serving Welch. 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 Welch?

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

What contaminants are in Welch's water?

The contaminants EPA monitoring detected in Welch include Nitrate-Nitrite, Fluoride, Copper, Barium, Gross Alpha, Excl. Radon And U. 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.