What was found in Covington'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 |
|---|---|---|---|
| Copper | 1800 µg/L 138% of the EPA limit, at the 95th percentile of samples — 1300 µg/L Highest in the city: ST TAM PARISH - LAKE HILLS VILLAGE · 88 people · 2019 | 21/23 | SYR4 |
| Nitrate-Nitrite | 200 µg/L 2% of the EPA limit 10000 µg/L Main supplier: ST TAM PARISH- BEDICO -FAUBOURG-COQUILLE · 18,372 people · 2019
Highest in the city: 1000 µg/L — ALEXANDER MILNE HOME FOR WOMEN · 42 people · 2019 | 17/23 | SYR4 |
| Fluoride | 236.5 µg/L 5.9% of the EPA limit 4000 µg/L Main supplier: ST TAM PARISH- BEDICO -FAUBOURG-COQUILLE · 18,372 people · 2017
Highest in the city: 700 µg/L — ST TAM PARISH - ALTON · 499 people · 2019 | 22/23 | SYR4 |
| TTHM | 6.89 µg/L 8.6% of the EPA limit 80 µg/L Main supplier: ST TAM PARISH- BEDICO -FAUBOURG-COQUILLE · 18,372 people · 2019
Highest in the city: 80.425 µg/L — ST TAM PARISH - ALTON · 499 people · 2019 | 23/23 | SYR4 |
| Chloroform | 1.83 µg/L No EPA limit set Main supplier: ST TAM PARISH- BEDICO -FAUBOURG-COQUILLE · 18,372 people · 2019
Highest in the city: 67.245 µg/L — ST TAM PARISH - ALTON · 499 people · 2019 | 23/23 | SYR4 |
| Barium | 18 µg/L 0.9% of the EPA limit 2000 µg/L Main supplier: ST TAM PARISH- BEDICO -FAUBOURG-COQUILLE · 18,372 people · 2017
Highest in the city: 65.85 µg/L — ALEXANDER MILNE HOME FOR WOMEN · 42 people · 2018 | 6/23 | SYR4 |
| Lead | 1.9 µg/L 13% of the EPA limit 15 µg/L Main supplier: ST TAM PARISH- BEDICO -FAUBOURG-COQUILLE · 18,372 people · 2017
Highest in the city: 45.6 µg/L — ST TAM PARISH -NORTHRIDGE ESTATES · 1,653 people · 2019 | 23/23 | SYR4 |
| Total Haloacetic Acids (HAA5) | 2.594 µg/L 4.3% of the EPA limit 60 µg/L Main supplier: ST TAM PARISH- BEDICO -FAUBOURG-COQUILLE · 18,372 people · 2019
Highest in the city: 35.865 µg/L — ST TAM PARISH - ALTON · 499 people · 2019 | 23/23 | SYR4 |
| Dichloroacetic Acid | 1.07 µg/L No EPA limit set Main supplier: ST TAM PARISH- BEDICO -FAUBOURG-COQUILLE · 18,372 people · 2019
Highest in the city: 23.63 µg/L — ST TAM PARISH - ALTON · 499 people · 2019 | 23/23 | SYR4 |
| Selenium | 22.8 µg/L 46% of the EPA limit 50 µg/L Highest in the city: ST TAM PARISH PINELAND PARK SUBD · 2,500 people · 2018 | 1/23 | SYR4 |
| Lithium | 16.7 µg/L No EPA limit set Main supplier: ST TAM PARISH- BEDICO -FAUBOURG-COQUILLE · 18,372 people · 2024 | 5/23 | UCMR-5 |
| Trichloroacetic Acid | 0.7035 µg/L No EPA limit set Main supplier: ST TAM PARISH- BEDICO -FAUBOURG-COQUILLE · 18,372 people · 2019
Highest in the city: 13.28 µg/L — ST TAM PARISH - ALTON · 499 people · 2019 | 23/23 | SYR4 |
| Bromodichloromethane | 2.11 µg/L No EPA limit set Main supplier: ST TAM PARISH- BEDICO -FAUBOURG-COQUILLE · 18,372 people · 2019
Highest in the city: 11.8 µg/L — ST TAM PARISH - ALTON · 499 people · 2019 | 21/23 | SYR4 |
| Chromium | 10 µg/L 10% of the EPA limit 100 µg/L Highest in the city: ST TAM PARISH -NORTHRIDGE ESTATES · 1,653 people · 2017 | 1/23 | SYR4 |
| Dibromochloromethane | 4.015 µg/L No EPA limit set Main supplier: ST TAM PARISH- BEDICO -FAUBOURG-COQUILLE · 18,372 people · 2019
Highest in the city: 8.52 µg/L — LAKE RAMSEY · 840 people · 2019 | 18/23 | SYR4 |
| Xylenes, Total | 2.2 µg/L 0% of the EPA limit 10000 µg/L Main supplier: ST TAM PARISH- BEDICO -FAUBOURG-COQUILLE · 18,372 people · 2018
Highest in the city: 7.2 µg/L — ST TAM PARISH - TAMANEND · 222 people · 2017 | 3/23 | SYR4 |
| Monobromoacetic Acid | 6.9 µg/L No EPA limit set Highest in the city: ST TAM PARISH - RIVER OAKS · 933 people · 2019 | 3/23 | SYR4 |
| Monochloroacetic Acid | 1.2 µg/L No EPA limit set Main supplier: ST TAM PARISH- BEDICO -FAUBOURG-COQUILLE · 18,372 people · 2019
Highest in the city: 6.9 µg/L — ST TAM PARISH- BEN THOMAS RD · 220 people · 2019 | 10/23 | SYR4 |
| Gross Alpha, Excl. Radon And U | 6.25 pCi/L 42% of the EPA limit 15 pCi/L Highest in the city: ALEXANDER MILNE HOME FOR WOMEN · 42 people · 2014 | 1/23 | SYR4 |
| Arsenic | 1.995 µg/L 20% of the EPA limit 10 µg/L Main supplier: ST TAM PARISH- BEDICO -FAUBOURG-COQUILLE · 18,372 people · 2017
Highest in the city: 5.375 µg/L — ALEXANDER MILNE HOME FOR WOMEN · 42 people · 2019 | 10/23 | SYR4 |
| Gross Beta Particle Activity | 2.72 pCi/L No EPA limit set Main supplier: ST TAM PARISH- BEDICO -FAUBOURG-COQUILLE · 18,372 people · 2018
Highest in the city: 4.8735 pCi/L — LEE ROAD WATER CORPORATION · 7,665 people · 2017 | 11/23 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 3.87 µg/L 65% of the EPA limit 6 µg/L Highest in the city: ST TAM PARISH - ALTON · 499 people · 2019 | 16/23 | SYR4 |
| Dibromoacetic Acid | 1.1475 µg/L No EPA limit set Main supplier: ST TAM PARISH- BEDICO -FAUBOURG-COQUILLE · 18,372 people · 2019
Highest in the city: 3.525 µg/L — LAKE RAMSEY · 840 people · 2019 | 21/23 | SYR4 |
| Bromoform | 1.375 µg/L No EPA limit set Main supplier: ST TAM PARISH- BEDICO -FAUBOURG-COQUILLE · 18,372 people · 2019
Highest in the city: 3.1 µg/L — ST TAM PARISH - BRIARWOOD TERRACE · 17,536 people · 2019 | 10/23 | SYR4 |
| Combined Radium (-226 And -228) | 1.197 pCi/L 24% of the EPA limit 5 pCi/L Main supplier: ST TAM PARISH- BEDICO -FAUBOURG-COQUILLE · 18,372 people · 2018
Highest in the city: 2.1622 pCi/L — ALEXANDER MILNE HOME FOR WOMEN · 42 people · 2018 | 8/23 | SYR4 |
| Dalapon | 1.01 µg/L 0.5% of the EPA limit 200 µg/L Main supplier: ST TAM PARISH- BEDICO -FAUBOURG-COQUILLE · 18,372 people · 2018
Highest in the city: 2.033 µg/L — ST TAM PARISH - CROSS GATES SD · 8,037 people · 2017 | 9/23 | SYR4 |
| Ethylbenzene | 2 µg/L 0.3% of the EPA limit 700 µg/L Highest in the city: ST TAM PARISH - TAMANEND · 222 people · 2017 | 1/23 | SYR4 |
| Combined Uranium | 1.49 µg/L 5% of the EPA limit 30 µg/L Highest in the city: ST TAM PARISH - BRIARWOOD TERRACE · 17,536 people · 2014 | 1/23 | SYR4 |
| Antimony, Total | 1 µg/L 17% of the EPA limit 6 µg/L Highest in the city: TCHEFUNCTA CLUB ESTATES · 1,245 people · 2019 | 2/23 | SYR4 |
| Cadmium | 1 µg/L 20% of the EPA limit 5 µg/L Highest in the city: LEE ROAD WATER CORPORATION · 7,665 people · 2017 | 1/23 | SYR4 |
| Toluene | 0.9300 µg/L 0.1% of the EPA limit 1000 µg/L Highest in the city: ST TAM PARISH - TAMANEND · 222 people · 2017 | 2/23 | SYR4 |
| Di(2-ethylhexyl) Adipate | 0.8100 µg/L 0.2% of the EPA limit 400 µg/L Highest in the city: ST TAM PARISH PINELAND PARK SUBD · 2,500 people · 2018 | 1/23 | SYR4 |
| Styrene | 0.3900 µg/L 0.4% of the EPA limit 100 µg/L Highest in the city: ST TAM PARISH - TAMANEND · 222 people · 2017 | 1/23 | SYR4 |
| Pentachlorophenol | 0.2460 µg/L 25% of the EPA limit 1 µg/L Highest in the city: ST TAM PARISH - CROSS GATES SD · 8,037 people · 2017 | 5/23 | SYR4 |
| Hexachlorobenzene | 0.1020 µg/L 10% of the EPA limit 1 µg/L Highest in the city: ST TAM PARISH - RIVER OAKS · 933 people · 2018 | 1/23 | SYR4 |
| 6:2 Fts | 0.0082 µg/L No EPA limit set Highest in the city: ST TAM PARISH - CROSS GATES SD · 8,037 people · 2024 | 1/23 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: ST TAM PARISH- BEDICO -FAUBOURG-COQUILLE · 18,372 people · 2023
Highest in the city: 0.0070 mg/L — ST TAMMANY WATER DISTRICT 3 · 2,920 people · 2025 | 23/23 | 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 Covington
Frequently asked questions about Covington tap water
Is Covington tap water safe to drink?
EPA testing detected 37 contaminants in the water serving Covington. 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 Covington?
23 public water suppliers report drinking-water monitoring for Covington, Louisiana to the EPA. Each is listed above with its population served.
What contaminants are in Covington's water?
The contaminants EPA monitoring detected in Covington include Copper, Nitrate-Nitrite, Fluoride, TTHM, Chloroform. 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.