Ascension Parish County, Louisiana — public water systems
At a glance
27 active public water systems are filed under Ascension Parish County, Louisiana in EPA's SDWIS records, together reporting 35,302 people served. The largest is City of Gonzales Water System, which reports serving 16,806 people. 17 are community water systems serving people where they live; the other 10 are non-community systems, such as schools, workplaces, campgrounds and gas stations with their own supply.
Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.
Active systems
27
Population served
35.3K
Community systems
17
Groundwater share
88.9%
How does Ascension Parish County compare with other Louisiana counties?
Ascension Parish County has the 9th-most active public water systems among the 79 counties listed for active Louisiana systems in EPA records; among the 59 with 3 or more systems, the median has 13. Its systems report 35,302 people served in total, the 34th-largest county figure in the state and 0.7% of the statewide total. The average system here reports serving 1,308 people, well below the Louisiana average of 4,685. Population figures are what each system reports; people served by more than one system, such as a wholesaler and the town that buys from it, are counted by each.
Where does Ascension Parish County's drinking water come from?
By primary water source, Ascension Parish County's active systems draw on groundwater (23, 85%), surface water (2, 7.4%), purchased groundwater (1, 3.7%) and purchased surface water (1, 3.7%). Overall, 89% rely mainly on groundwater (including purchased groundwater) and 11% on surface water, compared with 92% and 7.7% across Louisiana. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, City of Gonzales Water System, draws primarily on groundwater.
What kinds of water systems operate in Ascension Parish County?
Ascension Parish County's active systems break down as 17 community systems (63%), 7 non-transient non-community systems (26%) and 3 transient non-community systems (11%). A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. EPA lists their owner types as private (85%) and local government (15%).
Water systems in Ascension Parish County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | City of Gonzales Water System | Ascension Parish | 16,806 | Community | Groundwater |
| 2 | Parish Utilities of Ascension | Ascension Parish | 9,732 | Community | Surface water |
| 3 | Ascension Consolidated Utility Dist 1 | Ascension Parish | 2,229 | Community | Purchased surface water |
| 4 | Basf Corporation | Ascension Parish | 1,391 | Non-transient non-community | Groundwater |
| 5 | Ascension Parish Water Works District 2 | Ascension Parish | 1,353 | Community | Purchased groundwater |
| 6 | Shell Chemical Company | Ascension Parish | 750 | Non-transient non-community | Surface water |
| 7 | Occidental Chemical Corporation | Ascension Parish | 500 | Non-transient non-community | Groundwater |
| 8 | Ascension Christian School | Ascension Parish | 480 | Non-transient non-community | Groundwater |
| 9 | Diversion Water - Bayou Estates | Ascension Parish | 450 | Community | Groundwater |
| 10 | Ryans Family Grocery | Ascension Parish | 185 | Transient non-community | Groundwater |
| 11 | Cypress Trace Manufactured Housing Comm. | Ascension Parish | 140 | Community | Groundwater |
| 12 | White Oaks Manufactured Housing Comm. | Ascension Parish | 138 | Community | Groundwater |
| 13 | Plantation Mobile Home Village | Ascension Parish | 132 | Community | Groundwater |
| 14 | Roddy Road Village Ascension, LLC | Ascension Parish | 120 | Community | Groundwater |
| 15 | Diversion Water - Cypress Lakes | Ascension Parish | 111 | Community | Groundwater |
| 16 | Orleans Room | Ascension Parish | 100 | Transient non-community | Groundwater |
| 17 | Jimmy Babin Apartments | Ascension Parish | 96 | Community | Groundwater |
| 18 | La Petit | Ascension Parish | 88 | Non-transient non-community | Groundwater |
| 19 | Family Court Mobile Home Park | Ascension Parish | 80 | Community | Groundwater |
| 20 | St Amant Trailer Park | Ascension Parish | 69 | Community | Groundwater |
| 21 | Treyville Courts Trailer Park | Ascension Parish | 69 | Community | Groundwater |
| 22 | Diversion Water - River Run Estates | Ascension Parish | 69 | Community | Groundwater |
| 23 | Pine Trailer Park | Ascension Parish | 60 | Community | Groundwater |
| 24 | Riverlands Apartments | Ascension Parish | 54 | Community | Groundwater |
| 25 | Safe Harbor | Ascension Parish | 50 | Non-transient non-community | Groundwater |
| 26 | Sprout Learning Center LLC | Ascension Parish | 25 | Non-transient non-community | Groundwater |
| 27 | Knights of Columbus 6389 | Ascension Parish | 25 | Transient non-community | Groundwater |
Ascension Parish County water systems: frequently asked questions
How many public water systems are in Ascension Parish County, Louisiana?
EPA's SDWIS records file 27 active public water systems under Ascension Parish County, Louisiana: 17 community systems (63%), 7 non-transient non-community systems (26%) and 3 transient non-community systems (11%).
Who supplies drinking water in Ascension Parish County, LA?
The largest community water systems filed under Ascension Parish County are City of Gonzales Water System (16,806 people served), Parish Utilities of Ascension (9,732 people served) and Ascension Consolidated Utility Dist 1 (2,229 people served). Which system serves a particular address depends on its service area, which EPA's SDWIS records do not include; a water bill or the local utility can confirm it.
Does Ascension Parish County's drinking water come from groundwater or surface water?
Of the 27 active public water systems in Ascension Parish County, 89% draw mainly on groundwater and 11% on surface water, counting purchased supplies. The largest system, City of Gonzales Water System, uses groundwater.
Where can I find a water quality report for Ascension Parish County?
Each community water system must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1, covering the previous calendar year. 17 community systems are filed under Ascension Parish County, so the report to look for is the one from the system that supplies your address.
How can I check violations for a water system in Ascension Parish County?
Open the system's profile from the list on this page. Each profile shows the most recent Safe Drinking Water Act violations in EPA's records, with plain-English labels and whether each one is resolved. For current compliance status, EPA ECHO is the primary source.
More Louisiana water systems
- All Louisiana public water systems· 1,121 active
- Tangipahoa Parish County· 32 systems
- Webster Parish County· 31 systems
- Ouachita Parish County· 28 systems
- St. Landry Parish County· 28 systems
- Livingston Parish County· 27 systems
- Bossier Parish County· 26 systems
- How to find out who supplies your drinking water
- How to find and read your annual water quality report
About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Public water systems in Ascension Parish County, Louisiana”, https://aquacensus.com/water-systems/louisiana/ascension-parish (data as of October 1, 2026).