What was found in Berwick'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 | 2250 µg/L 173% of the EPA limit, at the 95th percentile of samples — 1300 µg/L Main supplier: CITY OF BERWICK · 5,024 people · 2019 | 2/2 | SYR4 |
| Nitrate-Nitrite | 1100 µg/L 11% of the EPA limit 10000 µg/L Highest in the city: BERWICK BAYOU VISTA WW COMMISSION · 0 people · 2019 | 1/2 | SYR4 |
| Fluoride | 124 µg/L 3.1% of the EPA limit 4000 µg/L Highest in the city: BERWICK BAYOU VISTA WW COMMISSION · 0 people · 2019 | 1/2 | SYR4 |
| Barium | 71.8 µg/L 3.6% of the EPA limit 2000 µg/L Highest in the city: BERWICK BAYOU VISTA WW COMMISSION · 0 people · 2019 | 1/2 | SYR4 |
| TTHM | 43.775 µg/L 55% of the EPA limit 80 µg/L Main supplier: CITY OF BERWICK · 5,024 people · 2019
Highest in the city: 46.345 µg/L — BERWICK BAYOU VISTA WW COMMISSION · 0 people · 2015 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 37.35 µg/L 62% of the EPA limit 60 µg/L Main supplier: CITY OF BERWICK · 5,024 people · 2019
Highest in the city: 42.7 µg/L — BERWICK BAYOU VISTA WW COMMISSION · 0 people · 2015 | 2/2 | SYR4 |
| Dalapon | 38.1774 µg/L 19% of the EPA limit 200 µg/L Highest in the city: BERWICK BAYOU VISTA WW COMMISSION · 0 people · 2019 | 1/2 | SYR4 |
| Chloroform | 28.175 µg/L No EPA limit set Main supplier: CITY OF BERWICK · 5,024 people · 2019
Highest in the city: 29.2 µg/L — BERWICK BAYOU VISTA WW COMMISSION · 0 people · 2015 | 2/2 | SYR4 |
| Dichloroacetic Acid | 20.05 µg/L No EPA limit set Main supplier: CITY OF BERWICK · 5,024 people · 2019
Highest in the city: 22 µg/L — BERWICK BAYOU VISTA WW COMMISSION · 0 people · 2015 | 2/2 | SYR4 |
| Trichloroacetic Acid | 14.35 µg/L No EPA limit set Main supplier: CITY OF BERWICK · 5,024 people · 2019
Highest in the city: 16.55 µg/L — BERWICK BAYOU VISTA WW COMMISSION · 0 people · 2015 | 2/2 | SYR4 |
| Bromodichloromethane | 12.37 µg/L No EPA limit set Main supplier: CITY OF BERWICK · 5,024 people · 2019
Highest in the city: 13.8 µg/L — BERWICK BAYOU VISTA WW COMMISSION · 0 people · 2015 | 2/2 | SYR4 |
| Lead | 8.25 µg/L 55% of the EPA limit 15 µg/L Main supplier: CITY OF BERWICK · 5,024 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 4.14 µg/L No EPA limit set Main supplier: CITY OF BERWICK · 5,024 people · 2019
Highest in the city: 6.96 µg/L — BERWICK BAYOU VISTA WW COMMISSION · 0 people · 2015 | 2/2 | SYR4 |
| Cyanide | 5.7 µg/L 2.9% of the EPA limit 200 µg/L Highest in the city: BERWICK BAYOU VISTA WW COMMISSION · 0 people · 2019 | 1/2 | SYR4 |
| Monobromoacetic Acid | 4.775 µg/L No EPA limit set Main supplier: CITY OF BERWICK · 5,024 people · 2019 | 2/2 | SYR4 |
| Monochloroacetic Acid | 2.7 µg/L No EPA limit set Main supplier: CITY OF BERWICK · 5,024 people · 2019
Highest in the city: 3.52 µg/L — BERWICK BAYOU VISTA WW COMMISSION · 0 people · 2015 | 2/2 | SYR4 |
| Dibromoacetic Acid | 2.1 µg/L No EPA limit set Main supplier: CITY OF BERWICK · 5,024 people · 2019
Highest in the city: 3.4 µg/L — BERWICK BAYOU VISTA WW COMMISSION · 0 people · 2015 | 2/2 | SYR4 |
| Gross Beta Particle Activity | 2.845 pCi/L No EPA limit set Highest in the city: BERWICK BAYOU VISTA WW COMMISSION · 0 people · 2019 | 1/2 | SYR4 |
| 1,2,4-Trichlorobenzene | 1.6 µg/L 2.3% of the EPA limit 70 µg/L Highest in the city: BERWICK BAYOU VISTA WW COMMISSION · 0 people · 2019 | 1/2 | SYR4 |
| Arsenic | 1.167 µg/L 12% of the EPA limit 10 µg/L Highest in the city: BERWICK BAYOU VISTA WW COMMISSION · 0 people · 2019 | 1/2 | SYR4 |
| Bromoform | 0.3455 µg/L No EPA limit set Main supplier: CITY OF BERWICK · 5,024 people · 2019
Highest in the city: 1.158 µg/L — BERWICK BAYOU VISTA WW COMMISSION · 0 people · 2015 | 2/2 | SYR4 |
| Combined Radium (-226 And -228) | 1.12655 pCi/L 23% of the EPA limit 5 pCi/L Highest in the city: BERWICK BAYOU VISTA WW COMMISSION · 0 people · 2019 | 1/2 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 0.9500 µg/L 16% of the EPA limit 6 µg/L Highest in the city: BERWICK BAYOU VISTA WW COMMISSION · 0 people · 2019 | 1/2 | SYR4 |
| Carbon Tetrachloride | 0.7900 µg/L 16% of the EPA limit 5 µg/L Highest in the city: BERWICK BAYOU VISTA WW COMMISSION · 0 people · 2019 | 1/2 | SYR4 |
| Xylenes, Total | 0.6600 µg/L 0% of the EPA limit 10000 µg/L Highest in the city: BERWICK BAYOU VISTA WW COMMISSION · 0 people · 2019 | 1/2 | SYR4 |
| Selenium | 0.6245 µg/L 1.2% of the EPA limit 50 µg/L Highest in the city: BERWICK BAYOU VISTA WW COMMISSION · 0 people · 2019 | 1/2 | SYR4 |
| P-Dichlorobenzene | 0.3200 µg/L 0.4% of the EPA limit 75 µg/L Highest in the city: BERWICK BAYOU VISTA WW COMMISSION · 0 people · 2019 | 1/2 | SYR4 |
| Atrazine | 0.2950 µg/L 9.8% of the EPA limit 3 µg/L Highest in the city: BERWICK BAYOU VISTA WW COMMISSION · 0 people · 2019 | 1/2 | SYR4 |
| O-Dichlorobenzene | 0.2700 µg/L 0% of the EPA limit 600 µg/L Highest in the city: BERWICK BAYOU VISTA WW COMMISSION · 0 people · 2019 | 1/2 | SYR4 |
| Endrin | 0.0090 µg/L 0.5% of the EPA limit 2 µg/L Highest in the city: BERWICK BAYOU VISTA WW COMMISSION · 0 people · 2019 | 1/2 | SYR4 |
| Pfba | 0.0063 µg/L No EPA limit set Main supplier: CITY OF BERWICK · 5,024 people · 2024 | 1/2 | UCMR-5 |
| Lead | 0.00070 mg/L 4.7% of the EPA limit 0.0150 mg/L Main supplier: CITY OF BERWICK · 5,024 people · 2025
Highest in the city: 0.0010 mg/L — BERWICK BAYOU VISTA WW COMMISSION · 0 people · 2014 | 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 Berwick
| Supplier | Population served |
|---|---|
| CITY OF BERWICK | 5,024 |
| BERWICK BAYOU VISTA WW COMMISSION | 0 |
Frequently asked questions about Berwick tap water
Is Berwick tap water safe to drink?
EPA testing detected 32 contaminants in the water serving Berwick. 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 Berwick?
2 public water suppliers report drinking-water monitoring for Berwick, Louisiana to the EPA. Each is listed above with its population served.
What contaminants are in Berwick's water?
The contaminants EPA monitoring detected in Berwick include Copper, Nitrate-Nitrite, Fluoride, Barium, TTHM. 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.