What was found in Youngsville'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 | 470 µg/L 4.7% of the EPA limit 10000 µg/L Main supplier: CITY OF YOUNGSVILLE WATER SYSTEM · 10,614 people · 2019
Highest in the city: 1000 µg/L — CAJUN MOBILE HOME PARK WATER SYSTEM · 168 people · 2019 | 2/3 | SYR4 |
| Fluoride | 339.5 µg/L 8.5% of the EPA limit 4000 µg/L Main supplier: CITY OF YOUNGSVILLE WATER SYSTEM · 10,614 people · 2019 | 2/3 | SYR4 |
| Copper | 100 µg/L 7.7% of the EPA limit 1300 µg/L Main supplier: CITY OF YOUNGSVILLE WATER SYSTEM · 10,614 people · 2019
Highest in the city: 300 µg/L — CITY OF YOUNGSVILLE PURCHASE WS · 7,623 people · 2018 | 3/3 | SYR4 |
| Barium | 233.29999999999993 µg/L 12% of the EPA limit 2000 µg/L Main supplier: CITY OF YOUNGSVILLE WATER SYSTEM · 10,614 people · 2019 | 2/3 | SYR4 |
| TTHM | 44.669999999999995 µg/L 56% of the EPA limit 80 µg/L Main supplier: CITY OF YOUNGSVILLE WATER SYSTEM · 10,614 people · 2019
Highest in the city: 56.87999999999994 µg/L — CAJUN MOBILE HOME PARK WATER SYSTEM · 168 people · 2019 | 3/3 | SYR4 |
| Lithium | 29.5 µg/L No EPA limit set Highest in the city: CITY OF YOUNGSVILLE PURCHASE WS · 7,623 people · 2025 | 1/3 | UCMR-5 |
| Dibromochloromethane | 15.51 µg/L No EPA limit set Main supplier: CITY OF YOUNGSVILLE WATER SYSTEM · 10,614 people · 2019
Highest in the city: 21.999999999999982 µg/L — CAJUN MOBILE HOME PARK WATER SYSTEM · 168 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 13.79 µg/L No EPA limit set Main supplier: CITY OF YOUNGSVILLE WATER SYSTEM · 10,614 people · 2019
Highest in the city: 16.53999999999998 µg/L — CAJUN MOBILE HOME PARK WATER SYSTEM · 168 people · 2019 | 3/3 | SYR4 |
| Lead | 5 µg/L 33% of the EPA limit 15 µg/L Main supplier: CITY OF YOUNGSVILLE WATER SYSTEM · 10,614 people · 2019
Highest in the city: 16.19999999999999 µg/L — CAJUN MOBILE HOME PARK WATER SYSTEM · 168 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 15.749999999999998 µg/L 26% of the EPA limit 60 µg/L Main supplier: CITY OF YOUNGSVILLE WATER SYSTEM · 10,614 people · 2019 | 3/3 | SYR4 |
| Chloroform | 9.89 µg/L No EPA limit set Main supplier: CITY OF YOUNGSVILLE WATER SYSTEM · 10,614 people · 2019
Highest in the city: 11.73999999999999 µg/L — CAJUN MOBILE HOME PARK WATER SYSTEM · 168 people · 2019 | 3/3 | SYR4 |
| Chromium | 11.57 µg/L 12% of the EPA limit 100 µg/L Highest in the city: CAJUN MOBILE HOME PARK WATER SYSTEM · 168 people · 2017 | 1/3 | SYR4 |
| Monochloroacetic Acid | 7.659999999999999 µg/L No EPA limit set Main supplier: CITY OF YOUNGSVILLE WATER SYSTEM · 10,614 people · 2019
Highest in the city: 10.599999999999998 µg/L — CAJUN MOBILE HOME PARK WATER SYSTEM · 168 people · 2019 | 3/3 | SYR4 |
| Bromoform | 7.805 µg/L No EPA limit set Main supplier: CITY OF YOUNGSVILLE WATER SYSTEM · 10,614 people · 2019
Highest in the city: 9.044999999999998 µg/L — CAJUN MOBILE HOME PARK WATER SYSTEM · 168 people · 2019 | 3/3 | SYR4 |
| Dibromoacetic Acid | 6.039999999999999 µg/L No EPA limit set Main supplier: CITY OF YOUNGSVILLE WATER SYSTEM · 10,614 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 4.6 µg/L No EPA limit set Main supplier: CITY OF YOUNGSVILLE WATER SYSTEM · 10,614 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 2.85 µg/L No EPA limit set Main supplier: CITY OF YOUNGSVILLE WATER SYSTEM · 10,614 people · 2019
Highest in the city: 4.069999999999999 µg/L — CAJUN MOBILE HOME PARK WATER SYSTEM · 168 people · 2019 | 3/3 | SYR4 |
| Arsenic | 3 µg/L 30% of the EPA limit 10 µg/L Main supplier: CITY OF YOUNGSVILLE WATER SYSTEM · 10,614 people · 2019 | 2/3 | SYR4 |
| Gross Beta Particle Activity | 2.563 pCi/L No EPA limit set Main supplier: CITY OF YOUNGSVILLE WATER SYSTEM · 10,614 people · 2019 | 2/3 | SYR4 |
| Combined Radium (-226 And -228) | 1.0150000000000001 pCi/L 20% of the EPA limit 5 pCi/L Main supplier: CITY OF YOUNGSVILLE WATER SYSTEM · 10,614 people · 2019
Highest in the city: 1.14 pCi/L — CAJUN MOBILE HOME PARK WATER SYSTEM · 168 people · 2017 | 2/3 | SYR4 |
| Monobromoacetic Acid | 0.5800 µg/L No EPA limit set Main supplier: CITY OF YOUNGSVILLE WATER SYSTEM · 10,614 people · 2019
Highest in the city: 1.0655000000000001 µg/L — CITY OF YOUNGSVILLE PURCHASE WS · 7,623 people · 2019 | 2/3 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 0.5190 µg/L 8.7% of the EPA limit 6 µg/L Main supplier: CITY OF YOUNGSVILLE WATER SYSTEM · 10,614 people · 2019
Highest in the city: 0.6835 µg/L — CAJUN MOBILE HOME PARK WATER SYSTEM · 168 people · 2017 | 2/3 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: CITY OF YOUNGSVILLE WATER SYSTEM · 10,614 people · 2025
Highest in the city: 0.0130 mg/L — CAJUN MOBILE HOME PARK WATER SYSTEM · 168 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 Youngsville
| Supplier | Population served |
|---|---|
| CITY OF YOUNGSVILLE WATER SYSTEM | 10,614 |
| CITY OF YOUNGSVILLE PURCHASE WS | 7,623 |
| CAJUN MOBILE HOME PARK WATER SYSTEM | 168 |
Frequently asked questions about Youngsville tap water
Is Youngsville tap water safe to drink?
EPA testing detected 23 contaminants in the water serving Youngsville. 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 Youngsville?
3 public water suppliers report drinking-water monitoring for Youngsville, Louisiana to the EPA. Each is listed above with its population served.
What contaminants are in Youngsville's water?
The contaminants EPA monitoring detected in Youngsville include Nitrate-Nitrite, Fluoride, Copper, 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.