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Community Water System · PWS MS0780010

Tomnolen Water Assn, Inc

Eupora, Mississippi 39744 - drinking water served from groundwater sources to 1,140 people, tracked in EPA SDWIS and UCMR5.

1,140
People served
361
EPA violations
4
Health-based
Untested
UCMR5 result

The verdict

EPA records 361 drinking-water violations at Tomnolen Water Assn, Inc, 1% of them health-based - below the Mississippi per-system average.

361
Total EPA violations on record
1%
Health-based (MCL / treatment failure)
1,140
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Tomnolen Water Assn, Inc

Tomnolen Water Assn, Inc is a public/private-owned community water system that delivers drinking water to 1,140 residents in Eupora, Mississippi (Webster County) through 384 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 361 total violations for this system , of which 4 (1%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 339 monitoring and reporting violations are on file. The most recent violation on record dates to 2017.

The most frequently cited contaminant at this system is Combined Uranium, recorded in 100 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 Mississippi, EPA tracks 1,185 public water systems serving 3,286,781 people, with 499,292 cumulative violations and 10,292 health-based violations on record. About 96% of systems in the state carry at least one violation, and state-wide the average per system is 421.3 violations. Statewide, 160 of 238 UCMR5-tested systems have reported PFAS detections (67.2%).

Tomnolen Water Assn, Inc's 361 violations sit below the Mississippi 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
1,140
Total Violations
361
Health-Based Violations
4
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Public/Private
Connections
384
County
Webster
School/Daycare
No
MCL Violations
4
Monitoring Violations
339
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Combined Uranium MR 100 2011
Radium-226 MR 84 2012
Radium-228 MR 84 2012
Combined Radium (-226 and -228) MR 28 2008
Gross Alpha, Excl. Radon and U MR 28 2008
Consumer Confidence Rule Other 16 2017
Chlorine MR 13 2008
Coliform (TCR) MCL 4 2005
Coliform (TCR) MR 2 2008
Public Notice Other 1 2008

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 Tomnolen Water Assn, Inc.

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 MS0780010 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Mississippi Drinking Water Authority

Mississippi'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 MS 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
2017 Consumer Confidence Rule Other 16 SDWIS / MS0780010 / 7000
2012 Radium-226 MR 84 SDWIS / MS0780010 / 4020
2012 Radium-228 MR 84 SDWIS / MS0780010 / 4030
2011 Combined Uranium MR 100 SDWIS / MS0780010 / 4006
2008 Combined Radium (-226 and -228) MR 28 SDWIS / MS0780010 / 4010
2008 Gross Alpha, Excl. Radon and U MR 28 SDWIS / MS0780010 / 4000
2008 Chlorine MR 13 SDWIS / MS0780010 / 0999
2008 Coliform (TCR) MR 2 SDWIS / MS0780010 / 3100
2008 Public Notice Other 1 SDWIS / MS0780010 / 7500
2005 Coliform (TCR) MCL 4 SDWIS / MS0780010 / 3100

How Tomnolen Water Assn, Inc Compares

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

Metric Tomnolen Water Assn, Inc Mississippi avg Federal benchmark
Total violations 361 421.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 4 8.7 Indicates a contaminant exceeded a federal MCL
PFAS detection None 67.2% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 1,140 2,774 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,185 regulated public water systems in Mississippi.

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 Tomnolen Water Assn, Inc water safe to drink? ▼
Tomnolen Water Assn, Inc (PWS ID: MS0780010) has 361 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,140 people using Groundwater sources.
How many people does Tomnolen Water Assn, Inc serve? ▼
Tomnolen Water Assn, Inc serves 1,140 people in Eupora, Mississippi. It is a Public/Private-owned system using Groundwater water sources with 384 service connections.
What type of violations does Tomnolen Water Assn, Inc have? ▼
Tomnolen Water Assn, Inc has 361 total violations: 4 health-based violations (MCL exceedances or treatment failures), 339 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Tomnolen Water Assn, Inc water? ▼
No PFAS testing data is available for Tomnolen Water Assn, Inc under the EPA's UCMR5 monitoring program.
What water source does Tomnolen Water Assn, Inc use? ▼
Tomnolen Water Assn, Inc 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.