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Tap water quality report

Sulphur, OK

EPA monitoring detected 19 contaminants across the 3 water suppliers serving Sulphur. 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
10,989
people served
19
contaminants found
Oklahoma rankings Lead in Oklahoma PFAS in Oklahoma

What was found in Sulphur'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
738 µg/L 7.4%
of the EPA limit 10000 µg/L
Highest in the city: MURRAY CO RWD # 1 · 4,800 people · 2019
1/3 SYR4
Copper
223.295 µg/L 17%
of the EPA limit 1300 µg/L
Main supplier: SULPHUR · 4,929 people · 2019
3/3 SYR4
Fluoride
110 µg/L 2.8%
of the EPA limit 4000 µg/L
Highest in the city: MURRAY CO RWD # 1 · 4,800 people · 2015
1/3 SYR4
Barium
87 µg/L 4.4%
of the EPA limit 2000 µg/L
Highest in the city: MURRAY CO RWD # 1 · 4,800 people · 2015
1/3 SYR4
Lead
68.935 µg/L 460%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: SULPHUR · 4,929 people · 2019
3/3 SYR4
Total Haloacetic Acids (HAA5)
1.419 µg/L 2.4%
of the EPA limit 60 µg/L
Main supplier: SULPHUR · 4,929 people · 2019
Highest in the city: 48.2 µg/L — MURRAY CO RWD # 1 · 4,800 people · 2019
2/3 SYR4
Trichloroacetic Acid
31.8 µg/L
No EPA limit set
Highest in the city: MURRAY CO RWD # 1 · 4,800 people · 2019
1/3 SYR4
Dichloroacetic Acid
1.419 µg/L
No EPA limit set
Main supplier: SULPHUR · 4,929 people · 2019
Highest in the city: 16.4 µg/L — MURRAY CO RWD # 1 · 4,800 people · 2019
2/3 SYR4
Gross Alpha, Excl. Radon And U
6.211 pCi/L 41%
of the EPA limit 15 pCi/L
Main supplier: SULPHUR · 4,929 people · 2019
2/3 SYR4
TTHM
4.09 µg/L 5.1%
of the EPA limit 80 µg/L
Highest in the city: BUCKHORN RWD #2 · 1,260 people · 2019
2/3 SYR4
Combined Radium (-226 And -228)
3.8855 pCi/L 78%
of the EPA limit 5 pCi/L
Main supplier: SULPHUR · 4,929 people · 2019
2/3 SYR4
Gross Beta Particle Activity
2.759 pCi/L
No EPA limit set
Main supplier: SULPHUR · 4,929 people · 2019
2/3 SYR4
Combined Uranium
2.01 µg/L 6.7%
of the EPA limit 30 µg/L
Highest in the city: MURRAY CO RWD # 1 · 4,800 people · 2015
1/3 SYR4
Selenium
2 µg/L 4%
of the EPA limit 50 µg/L
Highest in the city: MURRAY CO RWD # 1 · 4,800 people · 2015
1/3 SYR4
Bromoform
1.86 µg/L
No EPA limit set
Highest in the city: MURRAY CO RWD # 1 · 4,800 people · 2019
2/3 SYR4
Dibromochloromethane
1.729 µg/L
No EPA limit set
Highest in the city: MURRAY CO RWD # 1 · 4,800 people · 2019
2/3 SYR4
Bromodichloromethane
1.714 µg/L
No EPA limit set
Highest in the city: BUCKHORN RWD #2 · 1,260 people · 2019
2/3 SYR4
Chloroform
1.011 µg/L
No EPA limit set
Highest in the city: MURRAY CO RWD # 1 · 4,800 people · 2019
2/3 SYR4
Lead
0.0013 mg/L 8.9%
of the EPA limit 0.0150 mg/L
Main supplier: SULPHUR · 4,929 people · 2025
Highest in the city: 0.0095 mg/L — BUCKHORN RWD #2 · 1,260 people · 2024
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 Sulphur

SupplierPopulation served
SULPHUR 4,929
MURRAY CO RWD # 1 4,800
BUCKHORN RWD #2 1,260

Frequently asked questions about Sulphur tap water

Is Sulphur tap water safe to drink?

EPA testing detected 19 contaminants in the water serving Sulphur. 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 Sulphur?

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

What contaminants are in Sulphur's water?

The contaminants EPA monitoring detected in Sulphur include Nitrate-Nitrite, Copper, Fluoride, Barium, Lead. 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.