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Calcasieu Parish County, Louisiana — public water systems

At a glance

72 active public water systems are filed under Calcasieu Parish County, Louisiana in EPA's SDWIS records, together reporting 213,234 people served. The largest is City of Lake Charles Water System, which reports serving 79,500 people. 37 are community water systems serving people where they live; the other 35 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

72

Population served

213.2K

Community systems

37

Groundwater share

100%

How does Calcasieu Parish County compare with other Louisiana counties?

Calcasieu Parish County has the 2nd-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 213,234 people served in total, the 7th-largest county figure in the state and 4.1% of the statewide total. The average system here reports serving 2,962 people, about 37% 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 Calcasieu Parish County's drinking water come from?

By primary water source, Calcasieu Parish County's active systems draw on groundwater (69, 96%) and purchased groundwater (3, 4.2%). Overall, all rely mainly on groundwater (including purchased groundwater) and none 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 Lake Charles Water System, draws primarily on groundwater.

What kinds of water systems operate in Calcasieu Parish County?

Calcasieu Parish County's active systems break down as 37 community systems (51%), 13 non-transient non-community systems (18%) and 22 transient non-community systems (31%). 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 (72%), local government (26%) and state government (1.4%).

The 50 largest water systems in Calcasieu Parish County

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Active public water systems in Calcasieu Parish County, Louisiana
#Water systemCountyPopulation servedTypeSource
1City of Lake Charles Water SystemCalcasieu Parish79,500CommunityGroundwater
2Sulphur City of Water SystemCalcasieu Parish24,489CommunityGroundwater
3Calcasieu Parish Ww District No 1Calcasieu Parish20,837CommunityGroundwater
4Calcasieu Parish Ww Dist 9 CarlyssCalcasieu Parish14,502CommunityGroundwater
5Houston River Waterworks District 11Calcasieu Parish6,915CommunityGroundwater
6Calcasieu Parish Ww District 8Calcasieu Parish6,834CommunityGroundwater
7Lawco - Dequincy Water SystemCalcasieu Parish5,370CommunityGroundwater
8Calcasieu Parish Ww District No 4Calcasieu Parish5,340CommunityGroundwater
9Calcasieu Parish Ww District No 5Calcasieu Parish5,088CommunityGroundwater
10Westlake City of Water SystemCalcasieu Parish4,858CommunityGroundwater
11Calcasieu Parish Ww District 7Calcasieu Parish4,791CommunityGroundwater
12Town of Vinton Water SystemCalcasieu Parish4,101CommunityGroundwater
13Town of Iowa Water SystemCalcasieu Parish3,636CommunityGroundwater
14Calcasieu Ww #14 Ward 5Calcasieu Parish3,150CommunityGroundwater
15Delta Downs Inc. Water SystemCalcasieu Parish2,481Non-transient non-communityGroundwater
16Calcasieu Parish Ww 12 Ward 3Calcasieu Parish2,130CommunityGroundwater
17Westlake Us 2 LLC S Complex Water SystemCalcasieu Parish1,700Non-transient non-communityGroundwater
18Gulf Stream Manor Water SystemCalcasieu Parish1,368CommunityGroundwater
19Citgo Petroleum Refinery Water SystemCalcasieu Parish1,263Non-transient non-communityGroundwater
20Quail Ridge Estates Water SystemCalcasieu Parish1,119CommunityGroundwater
21Toomey Rest Area Water SystemCalcasieu Parish1,001Transient non-communityGroundwater
22Waterworks Dist. No. 10 of Ward 7Calcasieu Parish942CommunityPurchased groundwater
23Country Pines North Subdivision WsCalcasieu Parish936CommunityGroundwater
24Phillips 66 Lake Charles RefineryCalcasieu Parish770Non-transient non-communityGroundwater
25Fairview Mobile Estates North WsCalcasieu Parish669CommunityGroundwater
26Mossville Ww District No 2Calcasieu Parish618CommunityPurchased groundwater
27Maplewood Place Park Water SystemCalcasieu Parish597Transient non-communityGroundwater
28Country Pines South Subdivision WsCalcasieu Parish570CommunityGroundwater
29The Charleston Mhc Water SystemCalcasieu Parish567CommunityGroundwater
30Border Town Travel PlazaCalcasieu Parish500Transient non-communityGroundwater
31Garden Heights Water SystemCalcasieu Parish465CommunityGroundwater
32Serenity Ponds Rv Resort Water SystemCalcasieu Parish450Transient non-communityGroundwater
33The Sallier Mhc Water SystemCalcasieu Parish400CommunityGroundwater
34Fairview Mobile Estates South WsCalcasieu Parish378CommunityGroundwater
35Prairie Plaza Water SystemCalcasieu Parish350Transient non-communityGroundwater
36Oak Meadows Subdivision Water SystemCalcasieu Parish318CommunityGroundwater
37Lake Charles Harbor Terminal District WsCalcasieu Parish300Non-transient non-communityGroundwater
38The Longhorn Truck Stop and RestaurantCalcasieu Parish300Transient non-communityGroundwater
39Cash Magic-Vinton Water SystemCalcasieu Parish300Transient non-communityGroundwater
40Sugarcane Townes Water SystemCalcasieu Parish288CommunityPurchased groundwater
41Osprey Lakes Rv Park Water SystemCalcasieu Parish279Transient non-communityGroundwater
42Oak Pine Mobile Home Park Water SystemCalcasieu Parish240CommunityGroundwater
43River Church Water SystemCalcasieu Parish220Transient non-communityGroundwater
44Texas Pelican ComplexCalcasieu Parish200Transient non-communityGroundwater
45The Reserve Mhc Water SystemCalcasieu Parish159CommunityGroundwater
46Beacon Country Store Water SystemCalcasieu Parish150Transient non-communityGroundwater
47C K B Trailer Park Water SystemCalcasieu Parish150CommunityGroundwater
48Big Lake Rv Park Water SystemCalcasieu Parish150Transient non-communityGroundwater
49South Calcasieu Estates Subdivision W SCalcasieu Parish144CommunityGroundwater
50Clearview Mobile Home ParkCalcasieu Parish141CommunityGroundwater

All other water systems in Calcasieu Parish County (22)

The remaining active systems filed under Calcasieu Parish County, largest first, with the population each reports serving.

Calcasieu Parish County water systems: frequently asked questions

How many public water systems are in Calcasieu Parish County, Louisiana?

EPA's SDWIS records file 72 active public water systems under Calcasieu Parish County, Louisiana: 37 community systems (51%), 13 non-transient non-community systems (18%) and 22 transient non-community systems (31%).

Who supplies drinking water in Calcasieu Parish County, LA?

The largest community water systems filed under Calcasieu Parish County are City of Lake Charles Water System (79,500 people served), Sulphur City of Water System (24,489 people served) and Calcasieu Parish Ww District No 1 (20,837 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 Calcasieu Parish County's drinking water come from groundwater or surface water?

Of the 72 active public water systems in Calcasieu Parish County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, City of Lake Charles Water System, uses groundwater.

Where can I find a water quality report for Calcasieu 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. 37 community systems are filed under Calcasieu 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 Calcasieu 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 Calcasieu Parish County, Louisiana”, https://aquacensus.com/water-systems/louisiana/calcasieu-parish (data as of October 1, 2026).