Is Donaldsonville, LA tap water safe?
The short answer
2 of the 3 utilities serving Donaldsonville have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and CDC’s records: Parish Utilities of Ascension and Ascension Consolidated Utility Dist 1.
Parish Utilities of Ascension, which serves the most people here, has 1 result above the legal limit and 1 result above EPA’s new limit, which takes effect in 2029. The worst: Total trihalomethanes (TTHM) at 56.8 ppb, above the legal limit.
A town can be served by more than one utility, and some homes are on private wells. The name on your water bill tells you which is yours, and your ZIP code narrows it down. They are listed by how many people each serves in Donaldsonville’s ZIP codes, from EPA’s estimates.
- Open report
Parish Utilities of Ascension
Louisiana · serves 9,732 people · about 380 in Donaldsonville
1 result above the legal limit and 1 result above EPA’s new limit, which takes effect in 2029. The worst: Total trihalomethanes (TTHM) at 56.8 ppb, above the legal limit.
8 health-based violations since 2016
- Open report
Ascension Consolidated Utility Dist 1
Louisiana · serves 2,229 people · under 100 in Donaldsonville
Nothing in its records is above a health goal.
4 health-based violations since 2016
- Open report
Ascension Parish Water Works District 2
Louisiana · serves 1,353 people · under 100 in Donaldsonville
1 result above the health goal. The worst: Lead at 4.0 ppb, above the health goal.
No health-based violations since 2016
What handles it
Each of these is certified, on a certifier’s listing, for a result above a line in Parish Utilities of Ascension’s water, which serves the most people here. Another utility’s report names what handles its own results.
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Aquasana Clean Water Machine (AQ-CWM2)
Countertop
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 9, 2026
Certified for: Total trihalomethanes (TTHM), PFOS
Ninja HydraSense Countertop Water Filtration System (WF1001)
Countertop
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 9, 2026
Certified for: Total trihalomethanes (TTHM), PFOS
PUR PLUS Faucet Filtration System, Horizontal (PFM400H)
Faucet mount
- NSF listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 16, 2026
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 16, 2026
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 16, 2026
Certified for: Total trihalomethanes (TTHM), PFOS
Water testing near Donaldsonville
The 3 labs Louisiana certifies closest to Donaldsonville, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
LDH Central Laboratory
Baton Rouge, LA · about 22 miles
Certified for bacteria
Curtis Environmental Services, Inc.
LaPlace, LA · about 34 miles
Certified for minerals and other inorganics, disinfection byproducts
LDH Amite Regional Laboratory
Amite, LA · about 51 miles
Certified for bacteria
ZIP codes in Donaldsonville
Which ZIP codes are in Donaldsonville: Census 2020 relationship files. Which utilities serve them, and how many people: EPA SDWIS and EPA’s service area map. Each utility’s results: EPA UCMR 5, EPA SDWIS, and EPA’s and the state’s compliance monitoring, as its report lists them. How they are measured: methodology. Certified labs: LDH, laboratories certified by Louisiana for drinking water analysis; distances from the Census 2020 ZIP code tabulation area gazetteer.
Near Donaldsonville
Towns nearby with a page of their own.
What to do next
- Read Parish Utilities of Ascension’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- About Total trihalomethanes (TTHM)What it does to health, where it comes from, and the certification claim that addresses it.About Total trihalomethanes (TTHM)
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water