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Community Water System · PWS LA1047008

Gillis Long Center

Carville, Louisiana 70721 - drinking water served from groundwater sources to 600 people, tracked in EPA SDWIS and UCMR5.

600
People served
22
EPA violations
2
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 22 drinking-water violations at Gillis Long Center, 9% of them health-based - below the Louisiana per-system average.

22
Total EPA violations on record
9%
Health-based (MCL / treatment failure)
600
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Gillis Long Center

Gillis Long Center is a federal-owned community water system that delivers drinking water to 600 residents in Carville, Louisiana (Iberville Parish County) through 150 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 22 total violations for this system , of which 2 (9%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 17 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 5 violations (MR). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

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%).

Gillis Long Center's 22 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
600
Total Violations
22
Health-Based Violations
2
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Federal
Connections
150
County
Iberville Parish
School/Daycare
No
MCL Violations
0
Monitoring Violations
17
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 5 2003
TTHM MR 4 2013
Lead and Copper Rule MR 4 2024
Total Haloacetic Acids (HAA5) MR 4 2013
Lead and Copper Rule TT 2 2023
Consumer Confidence Rule Other 1 2000

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 33 samples detected PFAS.

Contaminant Date Result MRL Status
NEtFOSAA 12/13/2023 <5.00 ppt 5.00 ppt Not Detected
NMeFOSAA 12/13/2023 <6.00 ppt 6.00 ppt Not Detected
PFTrDA 12/13/2023 <7.00 ppt 7.00 ppt Not Detected
PFTA 12/13/2023 <8.00 ppt 8.00 ppt Not Detected
PFDA 12/13/2023 <3.00 ppt 3.00 ppt Not Detected
PFTrDA 12/13/2023 <7.00 ppt 7.00 ppt Not Detected
NEtFOSAA 12/13/2023 <5.00 ppt 5.00 ppt Not Detected
NMeFOSAA 12/13/2023 <6.00 ppt 6.00 ppt Not Detected
PFBS 12/13/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 12/13/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxS 12/13/2023 <3.00 ppt 3.00 ppt Not Detected
PFNA 12/13/2023 <4.00 ppt 4.00 ppt Not Detected
PFTA 12/13/2023 <8.00 ppt 8.00 ppt Not Detected
HFPO-DA 12/13/2023 <5.00 ppt 5.00 ppt Not Detected
8:2 FTS 12/13/2023 <5.00 ppt 5.00 ppt Not Detected
PFMPA 12/13/2023 <4.00 ppt 4.00 ppt Not Detected
PFPeA 12/13/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 12/13/2023 <3.00 ppt 3.00 ppt Not Detected
PFEESA 12/13/2023 <3.00 ppt 3.00 ppt Not Detected
NFDHA 12/13/2023 <20.00 ppt 20.00 ppt Not Detected
PFHpS 12/13/2023 <3.00 ppt 3.00 ppt Not Detected
PFOS 12/13/2023 <4.00 ppt 4.00 ppt Not Detected
PFBA 12/13/2023 <5.00 ppt 5.00 ppt Not Detected
PFOA 12/13/2023 <4.00 ppt 4.00 ppt Not Detected
ADONA 12/13/2023 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 12/13/2023 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 12/13/2023 <5.00 ppt 5.00 ppt Not Detected
PFUnA 12/13/2023 <2.00 ppt 2.00 ppt Not Detected
PFHxA 12/13/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 12/13/2023 <3.00 ppt 3.00 ppt Not Detected
4:2 FTS 12/13/2023 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 12/13/2023 <5.00 ppt 5.00 ppt Not Detected
PFPeS 12/13/2023 <4.00 ppt 4.00 ppt Not Detected

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 Gillis Long Center.

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 LA1047008 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 4 SDWIS / LA1047008 / 5000
2023 Lead and Copper Rule TT 2 SDWIS / LA1047008 / 5000
2013 TTHM MR 4 SDWIS / LA1047008 / 2950
2013 Total Haloacetic Acids (HAA5) MR 4 SDWIS / LA1047008 / 2456
2003 Coliform (TCR) MR 5 SDWIS / LA1047008 / 3100
2000 Consumer Confidence Rule Other 1 SDWIS / LA1047008 / 7000

How Gillis Long Center Compares

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

Metric Gillis Long Center Louisiana avg Federal benchmark
Total violations 22 93.2 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 2 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 600 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 Gillis Long Center water safe to drink? ▼
Gillis Long Center (PWS ID: LA1047008) has 22 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 600 people using Groundwater sources.
How many people does Gillis Long Center serve? ▼
Gillis Long Center serves 600 people in Carville, Louisiana. It is a Federal-owned system using Groundwater water sources with 150 service connections.
What type of violations does Gillis Long Center have? ▼
Gillis Long Center has 22 total violations: 2 health-based violations (MCL exceedances or treatment failures), 17 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Gillis Long Center water? ▼
No. Gillis Long Center was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Gillis Long Center use? ▼
Gillis Long Center 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. PFAS data from EPA UCMR5 monitoring program (2023-2025). 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.