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Community Water System · PWS LA1103038

Sun Water Supply

Sun, Louisiana 70463 - drinking water served from groundwater sources to 726 people, tracked in EPA SDWIS and UCMR5.

726
People served
129
EPA violations
86
Health-based
Untested
UCMR5 result

The verdict

EPA records 129 drinking-water violations at Sun Water Supply, 67% of them health-based - above the Louisiana per-system average.

129
Total EPA violations on record
67%
Health-based (MCL / treatment failure)
726
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Sun Water Supply

Sun Water Supply is a local-owned community water system that delivers drinking water to 726 residents in Sun, Louisiana (St. Tammany Parish County) through 252 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 129 total violations for this system , of which 86 (67%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 11 monitoring and reporting violations are on file. The most recent violation on record dates to 2021.

The most frequently cited contaminant at this system is Groundwater Rule, recorded in 68 violations (TT, 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%).

Sun Water Supply's 129 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
726
Total Violations
129
Health-Based Violations
86
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
252
County
St. Tammany Parish
School/Daycare
No
MCL Violations
14
Monitoring Violations
11
Treatment Tech Violations
72

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Groundwater Rule TT 68 2021
Coliform (TCR) MCL 14 1999
Consumer Confidence Rule Other 9 2017
Public Notice Other 6 2021
Lead and Copper Rule MR 4 2012
Lead and Copper Rule TT 4 2018
Total Haloacetic Acids (HAA5) MR 3 2011
TTHM MR 3 2011
Revised Total Coliform Rule Other 2 2016
Coliform (TCR) MR 1 2001

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 Sun Water Supply.

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 LA1103038 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
2021 Groundwater Rule TT 68 SDWIS / LA1103038 / 0700
2021 Public Notice Other 6 SDWIS / LA1103038 / 7500
2018 Lead and Copper Rule TT 4 SDWIS / LA1103038 / 5000
2017 Consumer Confidence Rule Other 9 SDWIS / LA1103038 / 7000
2016 Revised Total Coliform Rule Other 2 SDWIS / LA1103038 / 8000
2012 Lead and Copper Rule MR 4 SDWIS / LA1103038 / 5000
2011 Total Haloacetic Acids (HAA5) MR 3 SDWIS / LA1103038 / 2456
2011 TTHM MR 3 SDWIS / LA1103038 / 2950
2001 Coliform (TCR) MR 1 SDWIS / LA1103038 / 3100
1999 Coliform (TCR) MCL 14 SDWIS / LA1103038 / 3100

How Sun Water Supply Compares

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

Metric Sun Water Supply Louisiana avg Federal benchmark
Total violations 129 93.2 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 86 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 726 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 Sun Water Supply water safe to drink? ▼
Sun Water Supply (PWS ID: LA1103038) has 129 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 726 people using Groundwater sources.
How many people does Sun Water Supply serve? ▼
Sun Water Supply serves 726 people in Sun, Louisiana. It is a Local-owned system using Groundwater water sources with 252 service connections.
What type of violations does Sun Water Supply have? ▼
Sun Water Supply has 129 total violations: 86 health-based violations (MCL exceedances or treatment failures), 11 monitoring/reporting violations, and 72 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Sun Water Supply water? ▼
No PFAS testing data is available for Sun Water Supply under the EPA's UCMR5 monitoring program.
What water source does Sun Water Supply use? ▼
Sun Water Supply 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.