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Community Water System · PWS LA1063115

Diversion Water - Old Mill Settlement

Prairieville, Louisiana 70769 - drinking water served from groundwater sources to 246 people, tracked in EPA SDWIS and UCMR5.

246
People served
19
EPA violations
4
Health-based
Untested
UCMR5 result

The verdict

EPA records 19 drinking-water violations at Diversion Water - Old Mill Settlement, 21% of them health-based - below the Louisiana per-system average.

19
Total EPA violations on record
21%
Health-based (MCL / treatment failure)
246
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Diversion Water - Old Mill Settlement

Diversion Water - Old Mill Settlement is a private-owned community water system that delivers drinking water to 246 residents in Prairieville, Louisiana (Livingston Parish County) through 82 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 19 total violations for this system , of which 4 (21%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 12 monitoring and reporting violations are on file. The most recent violation on record dates to 2018.

The most frequently cited contaminant at this system is Total Haloacetic Acids (HAA5), recorded in 5 violations (MR). 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%).

Diversion Water - Old Mill Settlement's 19 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
246
Total Violations
19
Health-Based Violations
4
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
82
County
Livingston Parish
School/Daycare
No
MCL Violations
4
Monitoring Violations
12
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Total Haloacetic Acids (HAA5) MR 5 2013
TTHM MR 5 2013
Coliform (TCR) MCL 4 2006
Consumer Confidence Rule Other 2 2010
Lead and Copper Rule MR 2 2018

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 Diversion Water - Old Mill Settlement.

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 LA1063115 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
2018 Lead and Copper Rule MR 2 SDWIS / LA1063115 / 5000
2013 Total Haloacetic Acids (HAA5) MR 5 SDWIS / LA1063115 / 2456
2013 TTHM MR 5 SDWIS / LA1063115 / 2950
2010 Consumer Confidence Rule Other 2 SDWIS / LA1063115 / 7000
2006 Coliform (TCR) MCL 4 SDWIS / LA1063115 / 3100

How Diversion Water - Old Mill Settlement Compares

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

Metric Diversion Water - Old Mill Settlement Louisiana avg Federal benchmark
Total violations 19 93.2 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 4 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 246 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 Diversion Water - Old Mill Settlement water safe to drink? ▼
Diversion Water - Old Mill Settlement (PWS ID: LA1063115) has 19 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 246 people using Groundwater sources.
How many people does Diversion Water - Old Mill Settlement serve? ▼
Diversion Water - Old Mill Settlement serves 246 people in Prairieville, Louisiana. It is a Private-owned system using Groundwater water sources with 82 service connections.
What type of violations does Diversion Water - Old Mill Settlement have? ▼
Diversion Water - Old Mill Settlement has 19 total violations: 4 health-based violations (MCL exceedances or treatment failures), 12 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Diversion Water - Old Mill Settlement water? ▼
No PFAS testing data is available for Diversion Water - Old Mill Settlement under the EPA's UCMR5 monitoring program.
What water source does Diversion Water - Old Mill Settlement use? ▼
Diversion Water - Old Mill Settlement 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.