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
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | City of Lake Charles Water System | Calcasieu Parish | 79,500 | Community | Groundwater |
| 2 | Sulphur City of Water System | Calcasieu Parish | 24,489 | Community | Groundwater |
| 3 | Calcasieu Parish Ww District No 1 | Calcasieu Parish | 20,837 | Community | Groundwater |
| 4 | Calcasieu Parish Ww Dist 9 Carlyss | Calcasieu Parish | 14,502 | Community | Groundwater |
| 5 | Houston River Waterworks District 11 | Calcasieu Parish | 6,915 | Community | Groundwater |
| 6 | Calcasieu Parish Ww District 8 | Calcasieu Parish | 6,834 | Community | Groundwater |
| 7 | Lawco - Dequincy Water System | Calcasieu Parish | 5,370 | Community | Groundwater |
| 8 | Calcasieu Parish Ww District No 4 | Calcasieu Parish | 5,340 | Community | Groundwater |
| 9 | Calcasieu Parish Ww District No 5 | Calcasieu Parish | 5,088 | Community | Groundwater |
| 10 | Westlake City of Water System | Calcasieu Parish | 4,858 | Community | Groundwater |
| 11 | Calcasieu Parish Ww District 7 | Calcasieu Parish | 4,791 | Community | Groundwater |
| 12 | Town of Vinton Water System | Calcasieu Parish | 4,101 | Community | Groundwater |
| 13 | Town of Iowa Water System | Calcasieu Parish | 3,636 | Community | Groundwater |
| 14 | Calcasieu Ww #14 Ward 5 | Calcasieu Parish | 3,150 | Community | Groundwater |
| 15 | Delta Downs Inc. Water System | Calcasieu Parish | 2,481 | Non-transient non-community | Groundwater |
| 16 | Calcasieu Parish Ww 12 Ward 3 | Calcasieu Parish | 2,130 | Community | Groundwater |
| 17 | Westlake Us 2 LLC S Complex Water System | Calcasieu Parish | 1,700 | Non-transient non-community | Groundwater |
| 18 | Gulf Stream Manor Water System | Calcasieu Parish | 1,368 | Community | Groundwater |
| 19 | Citgo Petroleum Refinery Water System | Calcasieu Parish | 1,263 | Non-transient non-community | Groundwater |
| 20 | Quail Ridge Estates Water System | Calcasieu Parish | 1,119 | Community | Groundwater |
| 21 | Toomey Rest Area Water System | Calcasieu Parish | 1,001 | Transient non-community | Groundwater |
| 22 | Waterworks Dist. No. 10 of Ward 7 | Calcasieu Parish | 942 | Community | Purchased groundwater |
| 23 | Country Pines North Subdivision Ws | Calcasieu Parish | 936 | Community | Groundwater |
| 24 | Phillips 66 Lake Charles Refinery | Calcasieu Parish | 770 | Non-transient non-community | Groundwater |
| 25 | Fairview Mobile Estates North Ws | Calcasieu Parish | 669 | Community | Groundwater |
| 26 | Mossville Ww District No 2 | Calcasieu Parish | 618 | Community | Purchased groundwater |
| 27 | Maplewood Place Park Water System | Calcasieu Parish | 597 | Transient non-community | Groundwater |
| 28 | Country Pines South Subdivision Ws | Calcasieu Parish | 570 | Community | Groundwater |
| 29 | The Charleston Mhc Water System | Calcasieu Parish | 567 | Community | Groundwater |
| 30 | Border Town Travel Plaza | Calcasieu Parish | 500 | Transient non-community | Groundwater |
| 31 | Garden Heights Water System | Calcasieu Parish | 465 | Community | Groundwater |
| 32 | Serenity Ponds Rv Resort Water System | Calcasieu Parish | 450 | Transient non-community | Groundwater |
| 33 | The Sallier Mhc Water System | Calcasieu Parish | 400 | Community | Groundwater |
| 34 | Fairview Mobile Estates South Ws | Calcasieu Parish | 378 | Community | Groundwater |
| 35 | Prairie Plaza Water System | Calcasieu Parish | 350 | Transient non-community | Groundwater |
| 36 | Oak Meadows Subdivision Water System | Calcasieu Parish | 318 | Community | Groundwater |
| 37 | Lake Charles Harbor Terminal District Ws | Calcasieu Parish | 300 | Non-transient non-community | Groundwater |
| 38 | The Longhorn Truck Stop and Restaurant | Calcasieu Parish | 300 | Transient non-community | Groundwater |
| 39 | Cash Magic-Vinton Water System | Calcasieu Parish | 300 | Transient non-community | Groundwater |
| 40 | Sugarcane Townes Water System | Calcasieu Parish | 288 | Community | Purchased groundwater |
| 41 | Osprey Lakes Rv Park Water System | Calcasieu Parish | 279 | Transient non-community | Groundwater |
| 42 | Oak Pine Mobile Home Park Water System | Calcasieu Parish | 240 | Community | Groundwater |
| 43 | River Church Water System | Calcasieu Parish | 220 | Transient non-community | Groundwater |
| 44 | Texas Pelican Complex | Calcasieu Parish | 200 | Transient non-community | Groundwater |
| 45 | The Reserve Mhc Water System | Calcasieu Parish | 159 | Community | Groundwater |
| 46 | Beacon Country Store Water System | Calcasieu Parish | 150 | Transient non-community | Groundwater |
| 47 | C K B Trailer Park Water System | Calcasieu Parish | 150 | Community | Groundwater |
| 48 | Big Lake Rv Park Water System | Calcasieu Parish | 150 | Transient non-community | Groundwater |
| 49 | South Calcasieu Estates Subdivision W S | Calcasieu Parish | 144 | Community | Groundwater |
| 50 | Clearview Mobile Home Park | Calcasieu Parish | 141 | Community | Groundwater |
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.
- Biolab, Inc.120
- East Park Subdivision Water System102
- Lake Charles Harbor & Terminal Coke Plnt100
- Crossfit Water System100
- Enos Derbonne Park Water System96
- Dunham Price Group Water System85
- Corbina Trailer Park Water System69
- K & P Mh & Rv Park Water System66
- Entergy Louisiana, LLC65
- Country Living Trailer Park Water System51
- Lake Charles Carbon Co-Reynolds Metals50
- Lake Charles Lng Co Water System49
- Sam Istre Construction Water System32
- Pelico Mart Water System25
- Westlake Us 2 LLC Family Center W S25
- Grab N Geaux Water System25
- Family Dollar 5483 Water System25
- Smokers Heaven Water System25
- Smokers Paradise Water System25
- Lacc Water System25
- One Stop Water System25
- Homsi #3 Water System25
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
- All Louisiana public water systems· 1,121 active
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- Tangipahoa Parish County· 32 systems
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- 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 Calcasieu Parish County, Louisiana”, https://aquacensus.com/water-systems/louisiana/calcasieu-parish (data as of October 1, 2026).