What was found in Port Arthur'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 |
|---|---|---|---|
| Chlorite | 869.25 µg/L 87% of the EPA limit 1000 µg/L Main supplier: CITY OF PORT ARTHUR · 56,039 people · 2019 | 1/1 | SYR4 |
| Fluoride | 829.5 µg/L 21% of the EPA limit 4000 µg/L Main supplier: CITY OF PORT ARTHUR · 56,039 people · 2019 | 1/1 | SYR4 |
| Copper | 293 µg/L 23% of the EPA limit 1300 µg/L Main supplier: CITY OF PORT ARTHUR · 56,039 people · 2019 | 1/1 | SYR4 |
| Nitrate | 190 µg/L 1.9% of the EPA limit 10000 µg/L Main supplier: CITY OF PORT ARTHUR · 56,039 people · 2019 | 1/1 | SYR4 |
| Cyanide | 127 µg/L 64% of the EPA limit 200 µg/L Main supplier: CITY OF PORT ARTHUR · 56,039 people · 2019 | 1/1 | SYR4 |
| Barium | 75.54 µg/L 3.8% of the EPA limit 2000 µg/L Main supplier: CITY OF PORT ARTHUR · 56,039 people · 2019 | 1/1 | SYR4 |
| TTHM | 37.63 µg/L 47% of the EPA limit 80 µg/L Main supplier: CITY OF PORT ARTHUR · 56,039 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 35.7 µg/L 60% of the EPA limit 60 µg/L Main supplier: CITY OF PORT ARTHUR · 56,039 people · 2019 | 1/1 | SYR4 |
| Chloroform | 25.29 µg/L No EPA limit set Main supplier: CITY OF PORT ARTHUR · 56,039 people · 2019 | 1/1 | SYR4 |
| Dichloroacetic Acid | 24.945 µg/L No EPA limit set Main supplier: CITY OF PORT ARTHUR · 56,039 people · 2019 | 1/1 | SYR4 |
| Nitrite | 20 µg/L 2% of the EPA limit 1000 µg/L Main supplier: CITY OF PORT ARTHUR · 56,039 people · 2013 | 1/1 | SYR4 |
| Lead | 15.51 µg/L 103% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: CITY OF PORT ARTHUR · 56,039 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 10.5 µg/L No EPA limit set Main supplier: CITY OF PORT ARTHUR · 56,039 people · 2019 | 1/1 | SYR4 |
| Trichloroacetic Acid | 9.2 µg/L No EPA limit set Main supplier: CITY OF PORT ARTHUR · 56,039 people · 2019 | 1/1 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 6.16 µg/L 103% of the EPA limit, at the 95th percentile of samples — 6 µg/L Main supplier: CITY OF PORT ARTHUR · 56,039 people · 2019 | 1/1 | SYR4 |
| Monochloroacetic Acid | 4.78 µg/L No EPA limit set Main supplier: CITY OF PORT ARTHUR · 56,039 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 4.5 µg/L No EPA limit set Main supplier: CITY OF PORT ARTHUR · 56,039 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 3.8 µg/L No EPA limit set Main supplier: CITY OF PORT ARTHUR · 56,039 people · 2019 | 1/1 | SYR4 |
| Pfba | 0.0055 µg/L No EPA limit set Main supplier: CITY OF PORT ARTHUR · 56,039 people · 2024 | 1/1 | UCMR-5 |
| Lead | 0.0024 mg/L 16% of the EPA limit 0.0150 mg/L Main supplier: CITY OF PORT ARTHUR · 56,039 people · 2025 | 1/1 | LCR |
Water suppliers serving Port Arthur
| Supplier | Population served |
|---|---|
| CITY OF PORT ARTHUR | 56,039 |
Frequently asked questions about Port Arthur tap water
Is Port Arthur tap water safe to drink?
EPA testing detected 20 contaminants in the water serving Port Arthur. 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 Port Arthur?
1 public water supplier report drinking-water monitoring for Port Arthur, Texas to the EPA. Each is listed above with its population served.
What contaminants are in Port Arthur's water?
The contaminants EPA monitoring detected in Port Arthur include Chlorite, Fluoride, Copper, Nitrate, Cyanide. 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.