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States → Missouri

Community Water System · PWS MO6036148

Ware Lake Subd

Dittmer, Missouri 63023-0000 - drinking water served from groundwater sources to 100 people, tracked in EPA SDWIS and UCMR5.

100
People served
143
EPA violations
40
Health-based
Untested
UCMR5 result

The verdict

EPA records 143 drinking-water violations at Ware Lake Subd, 28% of them health-based - above the Missouri per-system average.

143
Total EPA violations on record
28%
Health-based (MCL / treatment failure)
100
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Ware Lake Subd

Ware Lake Subd is a private-owned community water system that delivers drinking water to 100 residents in Dittmer, Missouri (Jefferson County) through 34 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 143 total violations for this system , of which 40 (28%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 81 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 67 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 Missouri, EPA tracks 2,823 public water systems serving 5,855,885 people, with 201,695 cumulative violations and 54,821 health-based violations on record. About 95% of systems in the state carry at least one violation, and state-wide the average per system is 71.4 violations. Statewide, 71 of 230 UCMR5-tested systems have reported PFAS detections (30.9%).

Ware Lake Subd's 143 violations sit above the Missouri 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
100
Total Violations
143
Health-Based Violations
40
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
34
County
Jefferson
School/Daycare
No
MCL Violations
40
Monitoring Violations
81
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 67 2000
Coliform (TCR) MCL 40 2013
Lead and Copper Rule MR 12 2021
Consumer Confidence Rule Other 6 2009
LEAD AND COPPER RULE REVISIONS RPT 2 2024
Gross Alpha, Excl. Radon and U MR 1 2004
Nitrate-Nitrite MR 1 2005

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 Ware Lake Subd.

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 MO6036148 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Missouri Drinking Water Authority

Missouri DNR, Public Drinking Water Branch is the primacy agency that licenses and inspects Ware Lake Subd under EPA-delegated authority.

Open MO regulator portal

Source: Missouri DNR, Public Drinking Water Branch

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 REVISIONS RPT 2 SDWIS / MO6036148 / 5200
2021 Lead and Copper Rule MR 12 SDWIS / MO6036148 / 5000
2013 Coliform (TCR) MCL 40 SDWIS / MO6036148 / 3100
2009 Consumer Confidence Rule Other 6 SDWIS / MO6036148 / 7000
2005 Nitrate-Nitrite MR 1 SDWIS / MO6036148 / 1038
2004 Gross Alpha, Excl. Radon and U MR 1 SDWIS / MO6036148 / 4000
2000 Coliform (TCR) MR 67 SDWIS / MO6036148 / 3100

How Ware Lake Subd Compares

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

Metric Ware Lake Subd Missouri avg Federal benchmark
Total violations 143 71.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 40 19.4 Indicates a contaminant exceeded a federal MCL
PFAS detection None 30.9% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 100 2,074 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 2,823 regulated public water systems in Missouri.

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 Ware Lake Subd water safe to drink? ▼
Ware Lake Subd (PWS ID: MO6036148) has 143 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 100 people using Groundwater sources.
How many people does Ware Lake Subd serve? ▼
Ware Lake Subd serves 100 people in Dittmer, Missouri. It is a Private-owned system using Groundwater water sources with 34 service connections.
What type of violations does Ware Lake Subd have? ▼
Ware Lake Subd has 143 total violations: 40 health-based violations (MCL exceedances or treatment failures), 81 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Ware Lake Subd water? ▼
No PFAS testing data is available for Ware Lake Subd under the EPA's UCMR5 monitoring program.
What water source does Ware Lake Subd use? ▼
Ware Lake Subd 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.