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Community Water System · PWS LA1015044

Sligo Water System Incorporated

Coushatta, Louisiana 71019 - drinking water served from groundwater sources to 2,850 people, tracked in EPA SDWIS and UCMR5.

2,850
People served
415
EPA violations
92
Health-based
Untested
UCMR5 result

The verdict

EPA records 415 drinking-water violations at Sligo Water System Incorporated, 22% of them health-based - above the Louisiana per-system average.

415
Total EPA violations on record
22%
Health-based (MCL / treatment failure)
2,850
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Sligo Water System Incorporated

Sligo Water System Incorporated is a private-owned community water system that delivers drinking water to 2,850 residents in Coushatta, Louisiana (Bossier Parish County) through 950 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 415 total violations for this system , of which 92 (22%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 180 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Public Notice, recorded in 110 violations (Other). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Louisiana, EPA tracks 1,234 public water systems serving 5,316,532 people, with 115,060 cumulative violations and 62,164 health-based violations on record. About 93% of systems in the state carry at least one violation, and state-wide the average per system is 93.2 violations. Statewide, 218 of 265 UCMR5-tested systems have reported PFAS detections (82.3%).

Sligo Water System Incorporated's 415 violations sit above the Louisiana average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
2,850
Total Violations
415
Health-Based Violations
92
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
950
County
Bossier Parish
School/Daycare
No
MCL Violations
43
Monitoring Violations
180
Treatment Tech Violations
49

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Public Notice Other 110 2024
Lead and Copper Rule MR 107 2023
Total Haloacetic Acids (HAA5) MR 30 2012
TTHM MR 30 2012
Lead and Copper Rule TT 28 2020
Consumer Confidence Rule Other 26 2023
Coliform (TCR) MCL 22 2011
Groundwater Rule TT 21 2021
Arsenic MCL 21 2018
Stage 2 Disinfectants and Disinfection Byproducts Rule MR 5 2008
Chlorine MR 5 2015
Coliform (TCR) MR 3 2015

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Sligo Water System Incorporated.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID LA1015044 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Louisiana Drinking Water Authority

Louisiana's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find LA regulator via EPA SDWIS

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2024 Public Notice Other 110 SDWIS / LA1015044 / 7500
2023 Lead and Copper Rule MR 107 SDWIS / LA1015044 / 5000
2023 Consumer Confidence Rule Other 26 SDWIS / LA1015044 / 7000
2021 Groundwater Rule TT 21 SDWIS / LA1015044 / 0700
2020 Lead and Copper Rule TT 28 SDWIS / LA1015044 / 5000
2018 Arsenic MCL 21 SDWIS / LA1015044 / 1005
2015 Chlorine MR 5 SDWIS / LA1015044 / 0999
2015 Coliform (TCR) MR 3 SDWIS / LA1015044 / 3100
2012 Total Haloacetic Acids (HAA5) MR 30 SDWIS / LA1015044 / 2456
2012 TTHM MR 30 SDWIS / LA1015044 / 2950
2011 Coliform (TCR) MCL 22 SDWIS / LA1015044 / 3100
2008 Stage 2 Disinfectants and Disinfection Byproducts Rule MR 5 SDWIS / LA1015044 / 0600

How Sligo Water System Incorporated Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Sligo Water System Incorporated Louisiana avg Federal benchmark
Total violations 415 93.2 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 92 50.4 Indicates a contaminant exceeded a federal MCL
PFAS detection None 82.3% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 2,850 4,308 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,234 regulated public water systems in Louisiana.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Sligo Water System Incorporated water safe to drink? ▼
Sligo Water System Incorporated (PWS ID: LA1015044) has 415 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 2,850 people using Groundwater sources.
How many people does Sligo Water System Incorporated serve? ▼
Sligo Water System Incorporated serves 2,850 people in Coushatta, Louisiana. It is a Private-owned system using Groundwater water sources with 950 service connections.
What type of violations does Sligo Water System Incorporated have? ▼
Sligo Water System Incorporated has 415 total violations: 92 health-based violations (MCL exceedances or treatment failures), 180 monitoring/reporting violations, and 49 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Sligo Water System Incorporated water? ▼
No PFAS testing data is available for Sligo Water System Incorporated under the EPA's UCMR5 monitoring program.
What water source does Sligo Water System Incorporated use? ▼
Sligo Water System Incorporated uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.