What was found in St. Martinville'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 |
|---|---|---|---|
| Nitrate-Nitrite | 200 µg/L 2% of the EPA limit 10000 µg/L Main supplier: CITY OF ST MARTINVILLE WATER SYSTEM · 7,263 people · 2019
Highest in the city: 2000 µg/L — ST MARTIN WATER WORKS DISTRICT 3 - CADE · 3,249 people · 2019 | 3/4 | SYR4 |
| Copper | 590.0000000000013 µg/L 45% of the EPA limit 1300 µg/L Main supplier: CITY OF ST MARTINVILLE WATER SYSTEM · 7,263 people · 2019
Highest in the city: 1224.999999999998 µg/L — ST MARTIN WATER WORKS DISTRICT 3 - CADE · 3,249 people · 2017 | 4/4 | SYR4 |
| Barium | 128.5 µg/L 6.4% of the EPA limit 2000 µg/L Main supplier: CITY OF ST MARTINVILLE WATER SYSTEM · 7,263 people · 2019
Highest in the city: 1000 µg/L — ST MARTIN INDUSTRIAL PARK WATER SYSTEM · 150 people · 2017 | 3/4 | SYR4 |
| Nitrate | 700 µg/L 7% of the EPA limit 10000 µg/L Highest in the city: ST MARTIN INDUSTRIAL PARK WATER SYSTEM · 150 people · 2019 | 1/4 | SYR4 |
| Fluoride | 430 µg/L 11% of the EPA limit 4000 µg/L Main supplier: CITY OF ST MARTINVILLE WATER SYSTEM · 7,263 people · 2019 | 3/4 | SYR4 |
| Nitrite | 310 µg/L 31% of the EPA limit 1000 µg/L Highest in the city: ST MARTIN INDUSTRIAL PARK WATER SYSTEM · 150 people · 2019 | 1/4 | SYR4 |
| TTHM | 86.9 µg/L 109% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: CITY OF ST MARTINVILLE WATER SYSTEM · 7,263 people · 2019 | 4/4 | SYR4 |
| Arsenic | 49.449999999999996 µg/L 494% of the EPA limit, at the 95th percentile of samples — 10 µg/L Highest in the city: ST MARTIN INDUSTRIAL PARK WATER SYSTEM · 150 people · 2019 | 2/4 | SYR4 |
| Monochloroacetic Acid | 47.559999999999995 µg/L No EPA limit set Main supplier: CITY OF ST MARTINVILLE WATER SYSTEM · 7,263 people · 2019 | 4/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 41.55 µg/L 69% of the EPA limit 60 µg/L Main supplier: CITY OF ST MARTINVILLE WATER SYSTEM · 7,263 people · 2019 | 4/4 | SYR4 |
| Lithium | 31.5 µg/L No EPA limit set Main supplier: CITY OF ST MARTINVILLE WATER SYSTEM · 7,263 people · 2025 | 1/4 | UCMR-5 |
| Dibromochloromethane | 29.650000000000002 µg/L No EPA limit set Main supplier: CITY OF ST MARTINVILLE WATER SYSTEM · 7,263 people · 2019 | 4/4 | SYR4 |
| Bromodichloromethane | 28.85 µg/L No EPA limit set Main supplier: CITY OF ST MARTINVILLE WATER SYSTEM · 7,263 people · 2019 | 4/4 | SYR4 |
| Chloroform | 23.625 µg/L No EPA limit set Main supplier: CITY OF ST MARTINVILLE WATER SYSTEM · 7,263 people · 2019 | 4/4 | SYR4 |
| Dichloroacetic Acid | 9.1 µg/L No EPA limit set Main supplier: CITY OF ST MARTINVILLE WATER SYSTEM · 7,263 people · 2019
Highest in the city: 16.919999999999998 µg/L — ST MARTIN WATER DISTRICT 4 - CATAHOULA · 3,000 people · 2019 | 4/4 | SYR4 |
| Trichloroacetic Acid | 10.299999999999997 µg/L No EPA limit set Main supplier: CITY OF ST MARTINVILLE WATER SYSTEM · 7,263 people · 2019 | 3/4 | SYR4 |
| Chromium | 10 µg/L 10% of the EPA limit 100 µg/L Highest in the city: ST MARTIN INDUSTRIAL PARK WATER SYSTEM · 150 people · 2017 | 2/4 | SYR4 |
| Lead | 5.749999999999986 µg/L 38% of the EPA limit 15 µg/L Main supplier: CITY OF ST MARTINVILLE WATER SYSTEM · 7,263 people · 2019
Highest in the city: 9.299999999999988 µg/L — ST MARTIN WATER DISTRICT 4 - CATAHOULA · 3,000 people · 2017 | 4/4 | SYR4 |
| Dibromoacetic Acid | 7.6499999999999995 µg/L No EPA limit set Main supplier: CITY OF ST MARTINVILLE WATER SYSTEM · 7,263 people · 2019 | 4/4 | SYR4 |
| Bromoform | 7 µg/L No EPA limit set Main supplier: CITY OF ST MARTINVILLE WATER SYSTEM · 7,263 people · 2019 | 2/4 | SYR4 |
| Monobromoacetic Acid | 6.3799999999999955 µg/L No EPA limit set Main supplier: CITY OF ST MARTINVILLE WATER SYSTEM · 7,263 people · 2019 | 1/4 | SYR4 |
| Gross Beta Particle Activity | 2.65 pCi/L No EPA limit set Main supplier: CITY OF ST MARTINVILLE WATER SYSTEM · 7,263 people · 2019
Highest in the city: 5.547499999999999 pCi/L — ST MARTIN INDUSTRIAL PARK WATER SYSTEM · 150 people · 2017 | 3/4 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 0.6485 µg/L 11% of the EPA limit 6 µg/L Main supplier: CITY OF ST MARTINVILLE WATER SYSTEM · 7,263 people · 2019
Highest in the city: 1.51 µg/L — ST MARTIN WATER WORKS DISTRICT 3 - CADE · 3,249 people · 2017 | 2/4 | SYR4 |
| Combined Radium (-226 And -228) | 1 pCi/L 20% of the EPA limit 5 pCi/L Main supplier: CITY OF ST MARTINVILLE WATER SYSTEM · 7,263 people · 2019
Highest in the city: 1.3618 pCi/L — ST MARTIN INDUSTRIAL PARK WATER SYSTEM · 150 people · 2017 | 3/4 | SYR4 |
| Dalapon | 1.179 µg/L 0.6% of the EPA limit 200 µg/L Highest in the city: ST MARTIN INDUSTRIAL PARK WATER SYSTEM · 150 people · 2017 | 1/4 | SYR4 |
| P-Dichlorobenzene | 0.8250 µg/L 1.1% of the EPA limit 75 µg/L Highest in the city: ST MARTIN WATER WORKS DISTRICT 3 - CADE · 3,249 people · 2017 | 1/4 | SYR4 |
| Picloram | 0.2200 µg/L 0% of the EPA limit 500 µg/L Highest in the city: ST MARTIN WATER WORKS DISTRICT 3 - CADE · 3,249 people · 2017 | 1/4 | SYR4 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: CITY OF ST MARTINVILLE WATER SYSTEM · 7,263 people · 2023
Highest in the city: 0.0130 mg/L — ST MARTIN INDUSTRIAL PARK WATER SYSTEM · 150 people · 2023 | 4/4 | 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 St. Martinville
| Supplier | Population served |
|---|---|
| CITY OF ST MARTINVILLE WATER SYSTEM | 7,263 |
| ST MARTIN WATER WORKS DISTRICT 3 - CADE | 3,249 |
| ST MARTIN WATER DISTRICT 4 - CATAHOULA | 3,000 |
| ST MARTIN INDUSTRIAL PARK WATER SYSTEM | 150 |
Frequently asked questions about St. Martinville tap water
Is St. Martinville tap water safe to drink?
EPA testing detected 28 contaminants in the water serving St. Martinville. 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 St. Martinville?
4 public water suppliers report drinking-water monitoring for St. Martinville, Louisiana to the EPA. Each is listed above with its population served.
What contaminants are in St. Martinville's water?
The contaminants EPA monitoring detected in St. Martinville include Nitrate-Nitrite, Copper, Barium, Nitrate, Fluoride. 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.