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Donaldsonville, LA Tap Water Quality 2026

Water quality report for Donaldsonville, LA — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at Donaldsonville's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: Parish Utilities Of Ascension PWSID: LA1005035 Updated: 2026 Q2
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1 violation currently open

Lead is 1.00 ppb, 7% of the action level. PFAS was detected below the federal limit.

D

Donaldsonville earns a D for water quality

Graded on violations, lead, and PFAS, with state inspection findings.

Lead: 1.00 ppb — 7% of the federal action level
PFAS detected below the federal limit
20 violations since 2015, 12 health-based
1 violation currently open
Donaldsonville's lead level vs. all Louisiana community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 1.00 ppb — 7% of the federal action level
✓ Lower lead than 88% of Louisiana utilities
Population Served
6495
~3190 connections
Water Source
Surface water
Drawn from surface water — SDWIS source code SW
Active Violations
1
1 open of 20 since 2015

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
7% of EPA action level
1.00 ppb
Action level: 15 ppb
The 90th-percentile lead result is 1.00 ppb, 7% of the 15 ppb federal action level. The action level is a treatment trigger, not a legal maximum, and it is measured across sampled taps rather than at any single home.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
TTHM MCL EXCEEDANCE 0.081 MG/L 0.080 mg/L 2024 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2018 Resolved
Consumer Confidence Rule OTHER — — 2017 Resolved
Consumer Confidence Rule OTHER — — 2017 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2016 Unaddressed
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2016 Resolved
Interim Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2016 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2016 Resolved
Chlorite MONITORING AND REPORTING — 1.0 mg/L 2016 Resolved
Chlorine dioxide DISINFECTANT LEVEL — 0.8 mg/L 2016 Resolved
Chlorite MONITORING AND REPORTING — 1.0 mg/L 2016 Resolved
Chlorite MONITORING AND REPORTING — 1.0 mg/L 2016 Resolved
Chlorine dioxide DISINFECTANT LEVEL — 0.8 mg/L 2016 Resolved
Chlorite MONITORING AND REPORTING — 1.0 mg/L 2015 Resolved
Chlorine dioxide DISINFECTANT LEVEL — 0.8 mg/L 2015 Archived
Chlorite MONITORING AND REPORTING — 1.0 mg/L 2015 Resolved
Chlorine dioxide DISINFECTANT LEVEL — 0.8 mg/L 2015 Archived
Chlorite MONITORING AND REPORTING — 1.0 mg/L 2015 Resolved
Chlorine dioxide DISINFECTANT LEVEL — 0.8 mg/L 2015 Archived
Chlorine dioxide DISINFECTANT LEVEL — 0.8 mg/L 2015 Archived
Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

1 violation remains open, out of 20 recorded since 2015 (12 health-based).

About the Main Water System

Utility Parish Utilities Of Ascension
PWSID LA1005035
Water source Surface water — Drawn from surface water — SDWIS source code SW
Population served 6,495
Service connections 3,190
Systems serving this area 2
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Donaldsonville tap water safe to drink? ▼
No federal limit is exceeded on record. 1 violation(s) remain open. Lead is 1.00 ppb, 7% of the action level.
Does Donaldsonville water have PFAS? ▼
PFAS was detected but stayed below the federal limit.
Who supplies water to Donaldsonville? ▼
Parish Utilities Of Ascension (PWSID LA1005035), one of 2 systems serving this area. Surface water. Drawn from surface water — SDWIS source code SW
When was this system last inspected? ▼
It was last inspected on 2025-05-13. No significant deficiencies were recorded.

What Should Donaldsonville Residents Do?

1
Read your annual water report
Your supplier publishes a Consumer Confidence Report each July covering the prior year.
2
Check for a lead service line
Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.
3
Follow the open violation
This system has an unresolved violation. Contact the supplier for its corrective-action schedule.

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