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Review government records associated with Gonzales, Louisiana.
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Check your water bill for your utility name and confirm the reporting year. See EPA’s guide to finding your annual water quality report.
Public water-system records for Gonzales, LA from EPA SDWIS.
City of Gonzales Water System
Active monitoring or reporting issue detected in EPA SDWIS.
Reviewed: active/open records as of Q1 2026
City listed in EPA records · Serves 16,806 people
Data from EPA SDWIS
Reviewed: source records as of Q1 2026
EPA UCMR5 — No PFAS detection records shown for these water systems
Open data source: EPA UCMR5DoD PFAS — No investigation records shown for this report
Open data source: DoD PFASEPA ATTAINS records identify assessed water bodies that do not meet water-quality standards for designated uses.
Bayou Conway
Reported: Nov 2026
Health-relevant causes: Mercury, Pathogens
Affected uses: Ecological, Other, Recreation
Data from EPA ATTAINS
NPDES permits regulate pollutant discharges into U.S. waterways. Facilities must report compliance quarterly.
Violation records
Last inspected: Dec 2025
Data from EPA ECHO
To investigate water contamination, check the sampling locations, dates and results below. For tap water records, see Drinking water quality above.
Reviewed: source records as of 2026
Review historical EPA air pollution records, including monitoring and facility emissions where available. For current conditions, check local air quality on AirNow.
Ascension County
Assessment year: 2020
According to EPA, a cancer risk of 50-in-1-million means that for every 1 million people continuously exposed to these air toxics over a 70-year lifetime, an estimated 50 may develop cancer from that exposure. This is in addition to cancer risk from all other causes.
Top modeled source groups
Data from EPA AirToxScreen
EPA designations apply to a specific pollutant and federal air quality standard (NAAQS). EPA can issue a clean-data determination while a formal designation remains in effect.
Maintenance areas
Previously nonattainment; currently meeting the standard and monitored under an EPA maintenance plan.
Baton Rouge
Ozone · 8-Hour Ozone (2008 Standard)
Classification: Marginal
Original designation: Jul 2012
Current design value: 0.073 ppm (2023-2025)
Historical designations under the revoked 1997 ozone standard
These records describe historical designations. EPA revoked the 1997 ozone standard on April 6, 2015.
Baton Rouge Area
Historical standard: 0.08 ppm (8-hour)
Historical designation: Maintenance · Subpart 2/Moderate
Original designation: Jun 2004
Open data source: EPA final revocation ruleContinuing requirements have not been verified for this area.
Data from EPA Green Book
EPA annual monitor summaries describe past measurements. For current air quality, see AirNow.
Bayou Plaquemine
Annual mean: 6.5 Parts per billion
Observation year: 2025
Annual mean: 0.039 Parts per million
EPA primary exceedance count: 1 (Ozone 8-hour 2015)
Observation year: 2025
Capitol — Baton Rouge, Louisiana
Annual mean: 0.1 Parts per million
Observation year: 2025
Data from EPA AQS
Reviewed: source records as of Q4 2025
Reviewed: source records as of 2024
Reviewed: source query run Nov 2026
Reviewed: source query run Nov 2026
Facilities with hazardous-waste handler records under RCRA in the reviewed 5-mile city-center search area. Active handler status is separate from air, water, or other ECHO compliance violations, which are shown in their own sections.
Active RCRA handler records in the reviewed city search area
Release reports
Reported: Dec 2021
Data from EPA UST Finder
Reviewed: reporting year 2024
No MSHA mine or extraction site records shown for this report.
Ascension Parish, LA
EPA Radon Zone Map (June 2024 release)
Ascension Parish is EPA Radon Zone 3 (low potential). EPA defines Zone 3 counties as having predicted average indoor screening levels below 2 pCi/L.
Radon levels can vary from home to home, so EPA recommends testing the property to know its indoor level.
FEMA flood zones describe mapped flood hazards. Look up a specific address with FEMA.
Minimal flood hazard — outside the 1% and 0.2% annual chance floodplains.
Results use an earlier stored RMP inventory. Current EPA ECHO location coverage is unverified.
EPA ECHO lists facilities linked to the Risk Management Program. Results include facilities with locations that can be matched. Records may be historical. Current operations, chemical inventories, and recent accident history are unverified.
Reviewed: 2000-present
Health outcomes from County Health Rankings. Values shown alongside state and national averages.
Ascension Parish, LouisianaPop. 130,458
County Health Rankings edition: 2024
Premature Death
Poor or Fair Health
Poor Physical Health Days
Poor Mental Health Days
Adult Smoking
Adult Obesity
Air Pollution - Particulate Matter
Drinking water violation indicator
Diabetes Prevalence
Life Expectancy
| Indicator | County | State | National |
|---|---|---|---|
| Premature Death | 8,443 | 11,464 | 7,972 |
| Poor or Fair Health | 15.6% | 19.3% | 14.2% |
| Poor Physical Health Days | 3.5 | 4.2 | 3.3 |
| Poor Mental Health Days | 5.0 | 5.7 | 4.8 |
| Adult Smoking | 16.7% | 20.1% | 15.0% |
| Adult Obesity | 36.3% | 38.7% | 34.0% |
| Air Pollution - Particulate Matter | 9.6 | 8.6 | 7.3 |
| Drinking water violation indicator | Yes | N/A | N/A |
| Diabetes Prevalence | 10.3% | 12.4% | 9.6% |
| Life Expectancy | 77.6 | 74.0 | 77.6 |
This report does not have PFAS sample results for the candidate water systems in Gonzales.
Check with the utility that serves your address for its testing results.
EPA drinking water records on this page list 1 violation for the City of Gonzales Water System.
Check your water bill to identify the utility serving your address. Ask that utility about current drinking water advisories.
Nearby EPA monitoring stations provide annual air quality measurements for Gonzales.
The monitoring station at Bayou Plaquemine recorded an annual average of 6.5 Parts per billion for nitrogen dioxide in 2025.
The monitoring station at Bayou Plaquemine recorded an annual average of 0.039 Parts per million for ozone in 2025.
The monitoring station at Capitol, Baton Rouge, Louisiana recorded an annual average of 0.1 Parts per million for carbon monoxide in 2025.
The radon data for Gonzales covers Ascension Parish. EPA places this area in Zone 3, with a predicted average indoor radon screening level below 2 picocuries per liter.
No Superfund or brownfield sites were returned for this city report.
The county data for Gonzales reports a life expectancy of 77.6 years in Ascension Parish, Louisiana.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.
The county data for Gonzales reports 8,443 years of life lost to deaths before age 75 per 100,000 residents in Ascension Parish, Louisiana. This measure adds up the years lost to early deaths and adjusts for differences in population age.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.
The county data for Gonzales lists fine-particle pollution (PM2.5) at 9.6 micrograms per cubic meter in Ascension Parish, Louisiana.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.