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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

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Active public water systems in Ascension Parish County, Louisiana
#Water systemCountyPopulation servedTypeSource
1City of Gonzales Water SystemAscension Parish16,806CommunityGroundwater
2Parish Utilities of AscensionAscension Parish9,732CommunitySurface water
3Ascension Consolidated Utility Dist 1Ascension Parish2,229CommunityPurchased surface water
4Basf CorporationAscension Parish1,391Non-transient non-communityGroundwater
5Ascension Parish Water Works District 2Ascension Parish1,353CommunityPurchased groundwater
6Shell Chemical CompanyAscension Parish750Non-transient non-communitySurface water
7Occidental Chemical CorporationAscension Parish500Non-transient non-communityGroundwater
8Ascension Christian SchoolAscension Parish480Non-transient non-communityGroundwater
9Diversion Water - Bayou EstatesAscension Parish450CommunityGroundwater
10Ryans Family GroceryAscension Parish185Transient non-communityGroundwater
11Cypress Trace Manufactured Housing Comm.Ascension Parish140CommunityGroundwater
12White Oaks Manufactured Housing Comm.Ascension Parish138CommunityGroundwater
13Plantation Mobile Home VillageAscension Parish132CommunityGroundwater
14Roddy Road Village Ascension, LLCAscension Parish120CommunityGroundwater
15Diversion Water - Cypress LakesAscension Parish111CommunityGroundwater
16Orleans RoomAscension Parish100Transient non-communityGroundwater
17Jimmy Babin ApartmentsAscension Parish96CommunityGroundwater
18La PetitAscension Parish88Non-transient non-communityGroundwater
19Family Court Mobile Home ParkAscension Parish80CommunityGroundwater
20St Amant Trailer ParkAscension Parish69CommunityGroundwater
21Treyville Courts Trailer ParkAscension Parish69CommunityGroundwater
22Diversion Water - River Run EstatesAscension Parish69CommunityGroundwater
23Pine Trailer ParkAscension Parish60CommunityGroundwater
24Riverlands ApartmentsAscension Parish54CommunityGroundwater
25Safe HarborAscension Parish50Non-transient non-communityGroundwater
26Sprout Learning Center LLCAscension Parish25Non-transient non-communityGroundwater
27Knights of Columbus 6389Ascension Parish25Transient non-communityGroundwater

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

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).