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Calcasieu Parish County, Missouri — public water systems

At a glance

3 active public water systems are filed under Calcasieu Parish County, Missouri in EPA's SDWIS records, together reporting 1,251 people served. The largest is Magnolia-Lake Street, which reports serving 651 people. All 3 are community water systems serving people where they live.

Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.

Active systems

3

Population served

1.3K

Community systems

3

Groundwater share

100%

How does Calcasieu Parish County compare with other Missouri counties?

Calcasieu Parish County has the 124th-most active public water systems among the 182 counties listed for active Missouri systems in EPA records; among the 132 with 3 or more systems, the median has 13. Its systems report 1,251 people served in total, the 131st-largest county figure in the state and less than 0.1% of the statewide total. The average system here reports serving 417 people, well below the Missouri average of 2,049. 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 (3, 100%). Overall, all rely mainly on groundwater (including purchased groundwater) and none on surface water, compared with 92% and 8.1% across Missouri. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Magnolia-Lake Street, draws primarily on groundwater.

What kinds of water systems operate in Calcasieu Parish County?

Calcasieu Parish County's active systems break down as 3 community systems (100%). 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. EPA lists their owner types as private (100%).

Water systems in Calcasieu Parish County

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Active public water systems in Calcasieu Parish County, Missouri
#Water systemCountyPopulation servedTypeSource
1Magnolia-Lake StreetCalcasieu Parish651CommunityGroundwater
2Magnolia-Utility Service of Lake CharlesCalcasieu Parish306CommunityGroundwater
3Magnolia-Brigas EstatesCalcasieu Parish294CommunityGroundwater

Calcasieu Parish County water systems: frequently asked questions

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

EPA's SDWIS records file 3 active public water systems under Calcasieu Parish County, Missouri: 3 community systems (100%).

Who supplies drinking water in Calcasieu Parish County, MO?

The largest community water systems filed under Calcasieu Parish County are Magnolia-Lake Street (651 people served), Magnolia-Utility Service of Lake Charles (306 people served) and Magnolia-Brigas Estates (294 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 3 active public water systems in Calcasieu Parish County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, Magnolia-Lake Street, 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. 3 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 Missouri 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, Missouri”, https://aquacensus.com/water-systems/missouri/calcasieu-parish (data as of October 1, 2026).