PlainWater
States → Missouri

Community Water System · PWS MO6036077

Lake Adelle Subd

Cedar Hill, Missouri 63016-0000 - drinking water served from groundwater sources to 380 people, tracked in EPA SDWIS and UCMR5.

380
People served
67
EPA violations
14
Health-based
Untested
UCMR5 result

The verdict

EPA records 67 drinking-water violations at Lake Adelle Subd, 21% of them health-based - below the Missouri per-system average.

67
Total EPA violations on record
21%
Health-based (MCL / treatment failure)
380
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Lake Adelle Subd

Lake Adelle Subd is a private-owned community water system that delivers drinking water to 380 residents in Cedar Hill, Missouri (Jefferson County) through 161 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 67 total violations for this system , of which 14 (21%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 41 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 35 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, 162 of 230 UCMR5-tested systems have reported PFAS detections (70.4%).

Lake Adelle Subd's 67 violations sit below 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
380
Total Violations
67
Health-Based Violations
14
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
161
County
Jefferson
School/Daycare
No
MCL Violations
14
Monitoring Violations
41
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 35 2012
Coliform (TCR) MCL 14 2006
Public Notice Other 6 2006
Revised Total Coliform Rule MON 4 2023
LEAD AND COPPER RULE REVISIONS RPT 3 2024
Stage 2 Disinfectants and Disinfection Byproducts Rule MR 2 2008
Consumer Confidence Rule Other 1 2025

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 Lake Adelle 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 MO6036077 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 Lake Adelle 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
2025 Consumer Confidence Rule Other 1 SDWIS / MO6036077 / 7000
2024 LEAD AND COPPER RULE REVISIONS RPT 3 SDWIS / MO6036077 / 5200
2023 Revised Total Coliform Rule MON 4 SDWIS / MO6036077 / 8000
2012 Coliform (TCR) MR 35 SDWIS / MO6036077 / 3100
2008 Stage 2 Disinfectants and Disinfection Byproducts Rule MR 2 SDWIS / MO6036077 / 0600
2006 Coliform (TCR) MCL 14 SDWIS / MO6036077 / 3100
2006 Public Notice Other 6 SDWIS / MO6036077 / 7500

How Lake Adelle Subd Compares

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

Metric Lake Adelle Subd Missouri avg Federal benchmark
Total violations 67 71.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 14 19.4 Indicates a contaminant exceeded a federal MCL
PFAS detection None 70.4% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 380 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 Lake Adelle Subd water safe to drink? ▼
Lake Adelle Subd (PWS ID: MO6036077) has 67 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 380 people using Groundwater sources.
How many people does Lake Adelle Subd serve? ▼
Lake Adelle Subd serves 380 people in Cedar Hill, Missouri. It is a Private-owned system using Groundwater water sources with 161 service connections.
What type of violations does Lake Adelle Subd have? ▼
Lake Adelle Subd has 67 total violations: 14 health-based violations (MCL exceedances or treatment failures), 41 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Lake Adelle Subd water? ▼
No PFAS testing data is available for Lake Adelle Subd under the EPA's UCMR5 monitoring program.
What water source does Lake Adelle Subd use? ▼
Lake Adelle 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.