PARISH UTILITIES OF ASCENSION
PWS ID: LA1005035 · DONALDSONVILLE, Louisiana 70346
PFAS Detected
4 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
Population Served
9,732
Total Violations
231
Health-Based Violations
164
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 3,190
- County
- Ascension Parish
- School/Daycare
- No
- MCL Violations
- 97
- Monitoring Violations
- 48
- Treatment Tech Violations
- 40
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| TTHM | MCL | 58 | 2024 |
| Chlorite | MR | 36 | 2016 |
| Coliform (TCR) | MCL | 28 | 2014 |
| Chlorine dioxide | MRDL | 27 | 2016 |
| Long Term 2 Enhanced Surface Water Treatment Rule | TT | 23 | 2018 |
| Consumer Confidence Rule | Other | 10 | 2017 |
| CARBON, TOTAL | TT | 8 | 2011 |
| Chlorite | MCL | 7 | 2012 |
| Interim Enhanced Surface Water Treatment Rule | TT | 5 | 2016 |
| Total Haloacetic Acids (HAA5) | MCL | 4 | 2003 |
| TTHM | MR | 4 | 2014 |
| Chloramine | MR | 4 | 2011 |
| Total Haloacetic Acids (HAA5) | MR | 4 | 2014 |
| Surface Water Treatment Rule | TT | 3 | 1996 |
| Groundwater Rule | TT | 1 | 2016 |
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 8 of 120 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| NFDHA | 8/30/2023 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| 6:2 FTS | 8/30/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFUnA | 8/30/2023 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| PFHxA | 8/30/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFDoA | 8/30/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFDA | 8/30/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFOA | 8/30/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFOS | 8/30/2023 | 0.0045 µg/L | 0.004 µg/L | Detected |
| PFNA | 8/30/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFHxS | 8/30/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpA | 8/30/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFBS | 8/30/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 9Cl-PF3ONS | 8/30/2023 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| ADONA | 8/30/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpS | 8/30/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFBA | 8/30/2023 | 0.0067 µg/L | 0.005 µg/L | Detected |
| PFPeS | 8/30/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| 4:2 FTS | 8/30/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 8:2 FTS | 8/30/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFMPA | 8/30/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFPeA | 8/30/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFMBA | 8/30/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFEESA | 8/30/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 11Cl-PF3OUdS | 8/30/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| HFPO-DA | 8/30/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| NMeFOSAA | 8/1/2023 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| NEtFOSAA | 8/1/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFTrDA | 8/1/2023 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| PFTA | 8/1/2023 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| lithium | 7/11/2023 | 10.4000 µg/L | 9 µg/L | Detected |
| NMeFOSAA | 6/20/2023 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| NEtFOSAA | 6/20/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFTrDA | 6/20/2023 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| PFTA | 6/20/2023 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| PFPeS | 4/5/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFOA | 4/5/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFOS | 4/5/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFUnA | 4/5/2023 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| PFNA | 4/5/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFHpA | 4/5/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxA | 4/5/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxS | 4/5/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFMPA | 4/5/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| 11Cl-PF3OUdS | 4/5/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 9Cl-PF3ONS | 4/5/2023 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| ADONA | 4/5/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| HFPO-DA | 4/5/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFBA | 4/5/2023 | 0.0063 µg/L | 0.005 µg/L | Detected |
| 6:2 FTS | 4/5/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 4:2 FTS | 4/5/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
PFAS data from EPA UCMR5 monitoring program (2023-2025).
This data is provided for informational purposes only.