PlainWater
States → Louisiana

Community Water System · PWS LA1097032

Greenbriar Prairie Basse Water System

Sunset, Louisiana 70584 - drinking water served from groundwater sources to 1,620 people, tracked in EPA SDWIS and UCMR5.

1,620
People served
73
EPA violations
36
Health-based
Untested
UCMR5 result

The verdict

EPA records 73 drinking-water violations at Greenbriar Prairie Basse Water System, 49% of them health-based - below the Louisiana per-system average.

73
Total EPA violations on record
49%
Health-based (MCL / treatment failure)
1,620
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Greenbriar Prairie Basse Water System

Greenbriar Prairie Basse Water System is a private-owned community water system that delivers drinking water to 1,620 residents in Sunset, Louisiana (St. Landry Parish County) through 540 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 73 total violations for this system , of which 36 (49%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 29 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 Coliform (TCR), recorded in 35 violations (MCL, health-based). 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%).

Greenbriar Prairie Basse Water System's 73 violations sit below 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
1,620
Total Violations
73
Health-Based Violations
36
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
540
County
St. Landry Parish
School/Daycare
No
MCL Violations
35
Monitoring Violations
29
Treatment Tech Violations
1

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 35 2012
Lead and Copper Rule MR 9 2024
TTHM MR 8 2015
Total Haloacetic Acids (HAA5) MR 8 2015
Consumer Confidence Rule Other 4 2010
Chlorine MR 4 2016
LEAD AND COPPER RULE REVISIONS TT 1 2024

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 Greenbriar Prairie Basse Water System.

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 LA1097032 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 Lead and Copper Rule MR 9 SDWIS / LA1097032 / 5000
2024 LEAD AND COPPER RULE REVISIONS TT 1 SDWIS / LA1097032 / 5200
2016 Chlorine MR 4 SDWIS / LA1097032 / 0999
2015 TTHM MR 8 SDWIS / LA1097032 / 2950
2015 Total Haloacetic Acids (HAA5) MR 8 SDWIS / LA1097032 / 2456
2012 Coliform (TCR) MCL 35 SDWIS / LA1097032 / 3100
2010 Consumer Confidence Rule Other 4 SDWIS / LA1097032 / 7000

How Greenbriar Prairie Basse Water System Compares

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

Metric Greenbriar Prairie Basse Water System Louisiana avg Federal benchmark
Total violations 73 93.2 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 36 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 1,620 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 Greenbriar Prairie Basse Water System water safe to drink? ▼
Greenbriar Prairie Basse Water System (PWS ID: LA1097032) has 73 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,620 people using Groundwater sources.
How many people does Greenbriar Prairie Basse Water System serve? ▼
Greenbriar Prairie Basse Water System serves 1,620 people in Sunset, Louisiana. It is a Private-owned system using Groundwater water sources with 540 service connections.
What type of violations does Greenbriar Prairie Basse Water System have? ▼
Greenbriar Prairie Basse Water System has 73 total violations: 36 health-based violations (MCL exceedances or treatment failures), 29 monitoring/reporting violations, and 1 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Greenbriar Prairie Basse Water System water? ▼
No PFAS testing data is available for Greenbriar Prairie Basse Water System under the EPA's UCMR5 monitoring program.
What water source does Greenbriar Prairie Basse Water System use? ▼
Greenbriar Prairie Basse Water System 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.