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.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Barium | 1000 µg/L 50% of the EPA limit 2000 µg/L Main supplier: SULPHUR CITY OF WATER SYSTEM · 24,489 people · 2019 | 2/3 | SYR4 |
| Copper | 880 µg/L 68% of the EPA limit 1300 µg/L Main supplier: SULPHUR CITY OF WATER SYSTEM · 24,489 people · 2019 | 3/3 | SYR4 |
| Fluoride | 210 µg/L 5.3% of the EPA limit 4000 µg/L Main supplier: SULPHUR CITY OF WATER SYSTEM · 24,489 people · 2019 | 3/3 | SYR4 |
| Nitrate-Nitrite | 200 µg/L 2% of the EPA limit 10000 µg/L Main supplier: SULPHUR CITY OF WATER SYSTEM · 24,489 people · 2019 | 1/3 | SYR4 |
| Lithium | 37.9 µg/L No EPA limit set Main supplier: SULPHUR CITY OF WATER SYSTEM · 24,489 people · 2024 | 3/3 | UCMR-5 |
| TTHM | 24.05 µg/L 30% of the EPA limit 80 µg/L Main supplier: SULPHUR CITY OF WATER SYSTEM · 24,489 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 11.108 µg/L No EPA limit set Main supplier: SULPHUR CITY OF WATER SYSTEM · 24,489 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 10.98 µg/L 18% of the EPA limit 60 µg/L Main supplier: SULPHUR CITY OF WATER SYSTEM · 24,489 people · 2019 | 3/3 | SYR4 |
| Lead | 3 µg/L 20% of the EPA limit 15 µg/L Main supplier: SULPHUR CITY OF WATER SYSTEM · 24,489 people · 2019
Highest in the city: 10.75 µg/L — CALCASIEU PARISH WW DIST 9 CARLYSS · 14,502 people · 2019 | 3/3 | SYR4 |
| Bromoform | 7.7 µg/L No EPA limit set Main supplier: SULPHUR CITY OF WATER SYSTEM · 24,489 people · 2019 | 3/3 | SYR4 |
| Monochloroacetic Acid | 7.5 µg/L No EPA limit set Main supplier: SULPHUR CITY OF WATER SYSTEM · 24,489 people · 2019 | 2/3 | SYR4 |
| Gross Beta Particle Activity | 7.3445 pCi/L No EPA limit set Main supplier: SULPHUR CITY OF WATER SYSTEM · 24,489 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 5.7325 µg/L No EPA limit set Main supplier: SULPHUR CITY OF WATER SYSTEM · 24,489 people · 2019 | 3/3 | SYR4 |
| Dibromoacetic Acid | 4.244 µg/L No EPA limit set Main supplier: SULPHUR CITY OF WATER SYSTEM · 24,489 people · 2019 | 3/3 | SYR4 |
| Chloroform | 2.2 µg/L No EPA limit set Main supplier: SULPHUR CITY OF WATER SYSTEM · 24,489 people · 2019
Highest in the city: 3.49 µg/L — CALCASIEU PARISH WW DIST 9 CARLYSS · 14,502 people · 2019 | 3/3 | SYR4 |
| Combined Radium (-226 And -228) | 3.18 pCi/L 64% of the EPA limit 5 pCi/L Main supplier: SULPHUR CITY OF WATER SYSTEM · 24,489 people · 2019 | 2/3 | SYR4 |
| Dichloroacetic Acid | 2.1715 µg/L No EPA limit set Main supplier: SULPHUR CITY OF WATER SYSTEM · 24,489 people · 2019
Highest in the city: 2.5 µg/L — CALCASIEU PARISH WW DIST 9 CARLYSS · 14,502 people · 2019 | 3/3 | SYR4 |
| Antimony, Total | 2.3 µg/L 38% of the EPA limit 6 µg/L Highest in the city: CALCASIEU PARISH WW DIST 9 CARLYSS · 14,502 people · 2019 | 1/3 | SYR4 |
| Monobromoacetic Acid | 1.79 µg/L No EPA limit set Main supplier: SULPHUR CITY OF WATER SYSTEM · 24,489 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 1.69 µg/L No EPA limit set Main supplier: SULPHUR CITY OF WATER SYSTEM · 24,489 people · 2019
Highest in the city: 1.695 µg/L — CALCASIEU PARISH WW DIST 9 CARLYSS · 14,502 people · 2019 | 3/3 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 0.8065 µg/L 13% of the EPA limit 6 µg/L Main supplier: SULPHUR CITY OF WATER SYSTEM · 24,489 people · 2019
Highest in the city: 1.057 µg/L — HOUSTON RIVER WATERWORKS DISTRICT 11 · 6,915 people · 2017 | 3/3 | SYR4 |
| Arsenic | 1 µg/L 10% of the EPA limit 10 µg/L Main supplier: SULPHUR CITY OF WATER SYSTEM · 24,489 people · 2019 | 2/3 | SYR4 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: SULPHUR CITY OF WATER SYSTEM · 24,489 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
| Supplier | Population served |
|---|---|
| SULPHUR CITY OF WATER SYSTEM | 24,489 |
| CALCASIEU PARISH WW DIST 9 CARLYSS | 14,502 |
| HOUSTON RIVER WATERWORKS DISTRICT 11 | 6,915 |
Frequently asked questions about Sulphur tap water
Is Sulphur tap water safe to drink?
EPA testing detected 23 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, Louisiana 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 Barium, Copper, Fluoride, Nitrate-Nitrite, Lithium. 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.