Ascension Consolidated Utility Dist 1
What EPA’s and CDC’s records show in this utility’s water: nitrate, arsenic and other regulated chemicals; lead and copper; and violations since 2016, with the certification that handles each result.
- Serves
- 2,229 people
- Connections
- 743
- Water source
- Surface water bought from another system
- Based in
- Donaldsonville, LA
- County
- Ascension Parish
- Owner
- Local government
The short answer
Nothing in EPA’s and CDC’s records for this utility is above a health goal. That covers nitrate, arsenic and other regulated chemicals, plus lead and copper, not everything. 4 health-based violations since 2016.
What was found
Haloacetic acids (HAA5) and total trihalomethanes (TTHM): Louisiana’s yearly averages per water system, as CDC’s Environmental Public Health Tracking Network publishes them, 2020 to 2022, with EPA’s 2012 to 2019 file for earlier years.
Below EPA’s limits2
Haloacetic acids (HAA5)
Forms or is added in treatment
45.6ppb
Highest yearly average, 2020 to 2022
2022 average: 28.3 ppb
Averaged by year, the highest was 45.6 ppb, in 2021, below EPA’s legal limit of 60 ppb. In 2022, the latest year on file, it averaged 28.3 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 51.6 ppb, in 2019, and EPA recorded violations in 2015 and 2016.
What handles it
No certification claim covers this compound yet.
Total trihalomethanes (TTHM)
Forms or is added in treatment
57.3ppb
Highest yearly average, 2020 to 2022
2022 average: 38.5 ppb
Averaged by year, the highest was 57.3 ppb, in 2021, below EPA’s legal limit of 80 ppb. In 2022, the latest year on file, it averaged 38.5 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 87.2 ppb, in 2015, and EPA recorded violations in 2013, 2015 and 2016.
What handles it
- NSF/ANSI 53 look for “Trihalomethanes (TTHM) Reduction”
- NSF/ANSI 58 look for “Trihalomethanes (TTHM) Reduction”
One compound tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
- Lead
Violations since 2016
| Contaminant or rule | Type | Period | Measured | Status |
|---|---|---|---|---|
| TTHM | The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, Average | April 1, 2016 to June 30, 2016 | 96 UG/L | Resolved |
| Total Haloacetic Acids (HAA5) | The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, Average | April 1, 2016 to June 30, 2016 | 66 UG/L | Resolved |
| Total Haloacetic Acids (HAA5) | The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, Average | Jan. 1, 2016 to March 31, 2016 | 67 UG/L | Resolved |
| TTHM | The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, Average | Jan. 1, 2016 to March 31, 2016 | 97 UG/L | Resolved |
| Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 4 monitoring or reporting violations not shown. | ||||
What this report can’t tell you
Everything else. Haloacetic acids (HAA5) and total trihalomethanes (TTHM) results here are Louisiana’s yearly averages as CDC publishes them, from 2020 on, with EPA’s national file for 2012 to 2019. Ascension Consolidated Utility Dist 1’s own annual report, which it must send you every year, has the contaminants this page does not show.
Your own plumbing. Lead results are the 90th percentile across homes the utility samples. Your home’s service line, solder and fixtures decide yours. A certified lab test is the only way to know.
What it means for your health. This page reports what the records show and EPA’s limits and goals; it is not medical advice. If you are worried about a health effect, talk to a doctor or your local health department.
Anything after the latest data. SDWIS data is from 2026 Q3; UCMR 5 didn’t sample this utility; CDC’s yearly averages for Louisiana cover 2020 to 2022.
Testing your own tap
The 3 labs Louisiana certifies closest to the area Ascension Consolidated Utility Dist 1 serves, 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 28 miles
Certified for bacteria
Curtis Environmental Services, Inc.
LaPlace, LA · about 36 miles
Certified for minerals and other inorganics, disinfection byproducts
LDH Amite Regional Laboratory
Amite, LA · about 57 miles
Certified for bacteria
Sources
- EPA UCMR 5 occurrence data, file of Oct. 15, 2026
- EPA SDWA bulk download (SDWIS federal data), 2026 Q3
- CDC Environmental Public Health Tracking Network, yearly averages Louisiana supplied to CDC, 2020 to 2022, read Oct. 8, 2026. TapBuff’s comparisons with EPA’s limits are its own, not CDC’s or Louisiana’s.
- EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, file of Feb. 5, 2024
- Certified labs: LDH, laboratories certified by Louisiana for drinking water analysis, read Oct. 16, 2026; distances from the Census 2020 ZIP code tabulation area gazetteer
- Limits and goals: each contaminant’s page, with its EPA source.
- How this page is built: methodology.
PWSID LA1005045. Rebuilt from EPA data on Oct. 18, 2026.
Towns it serves
Nearby
- City of Gonzales Water System16,806
- Parish Utilities of Ascension9,732
- Ascension Parish Water Works District 21,353
- Diversion Water - Bayou Estates450
- Shady Oaks Mobile Home Park Water System192
- Cypress Trace Manufactured Housing Comm.140
- Assumption Parish Ww District 1Assumption Parish · 11 mi21,366
What to do next
- Nothing here is above a health goalIn EPA’s and CDC’s records for this utility. They don’t cover everything, which is why the next step matters.Every contaminant TapBuff tracks
- Get the utility’s own reportAscension Consolidated Utility Dist 1 must send you a water quality report every year. It covers contaminants this page does not show.How to read it
- Test your own tap for leadYour service line, solder and fixtures decide the lead at your faucet, not the utility’s average.Lead in your water: what to do
- Decide if you want a filter at allA filter for taste or chlorine is a preference, not a need. The standards say what each kind can do.NSF/ANSI standards, decoded