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HOLLY HILLS MHC

PWS ID: MI0040665 · DENVER, Michigan 80237

HOLLY HILLS MHC serves 435 people in DENVER, Michigan using Groundwater water sources. It has 97 recorded EPA violations, including 13 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: HOLLY HILLS MHC

HOLLY HILLS MHC is a private-owned community water system that delivers drinking water to 435 residents in DENVER, Michigan (Oakland County) through 96 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 97 total violations for this system , of which 13 (13%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 84 monitoring and reporting violations are on file. The most recent violation on record dates to 2012.

The most frequently cited contaminant at this system is Arsenic, recorded in 13 violations (MCL, 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 Michigan, EPA tracks 10,959 public water systems serving 9,098,093 people, with 255,201 cumulative violations and 31,467 health-based violations on record. About 86% of systems in the state carry at least one violation, and state-wide the average per system is 23.3 violations. HOLLY HILLS MHC's 97 violations sit above the Michigan average. Statewide, 87 of 318 UCMR5-tested systems have reported PFAS detections (27.4%). 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
435
Total Violations
97
Health-Based Violations
13
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
96
County
Oakland
School/Daycare
No
MCL Violations
13
Monitoring Violations
84
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Arsenic MCL 13 2006
1,2,4-Trichlorobenzene MR 4 2012
cis-1,2-Dichloroethylene MR 4 2012
Xylenes, Total MR 4 2012
trans-1,2-Dichloroethylene MR 4 2012
1,1,1-Trichloroethane MR 4 2012
1,2-Dichloropropane MR 4 2012
1,1,2-Trichloroethane MR 4 2012
Tetrachloroethylene MR 4 2012
Toluene MR 4 2012
Styrene MR 4 2012
Carbon tetrachloride MR 4 2012
Benzene MR 4 2012
Ethylbenzene MR 4 2012
DICHLOROMETHANE MR 4 2012
p-Dichlorobenzene MR 4 2012
o-Dichlorobenzene MR 4 2012
1,2-Dichloroethane MR 4 2012
Trichloroethylene MR 4 2012
1,1-Dichloroethylene MR 4 2012
Vinyl chloride MR 4 2012
CHLOROBENZENE MR 4 2012

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 HOLLY HILLS MHC.

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 MI0040665 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Michigan Drinking Water Authority

Michigan EGLE — Drinking Water and Environmental Health Division is the primacy agency that licenses and inspects HOLLY HILLS MHC under EPA-delegated authority.

Open MI regulator portal

Source: Michigan EGLE — Drinking Water and Environmental Health Division

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
2012 1,2,4-Trichlorobenzene MR 4 SDWIS / MI0040665 / 2378
2012 cis-1,2-Dichloroethylene MR 4 SDWIS / MI0040665 / 2380
2012 Xylenes, Total MR 4 SDWIS / MI0040665 / 2955
2012 trans-1,2-Dichloroethylene MR 4 SDWIS / MI0040665 / 2979
2012 1,1,1-Trichloroethane MR 4 SDWIS / MI0040665 / 2981
2012 1,2-Dichloropropane MR 4 SDWIS / MI0040665 / 2983
2012 1,1,2-Trichloroethane MR 4 SDWIS / MI0040665 / 2985
2012 Tetrachloroethylene MR 4 SDWIS / MI0040665 / 2987
2012 Toluene MR 4 SDWIS / MI0040665 / 2991
2012 Styrene MR 4 SDWIS / MI0040665 / 2996
2012 Carbon tetrachloride MR 4 SDWIS / MI0040665 / 2982
2012 Benzene MR 4 SDWIS / MI0040665 / 2990
2012 Ethylbenzene MR 4 SDWIS / MI0040665 / 2992
2012 DICHLOROMETHANE MR 4 SDWIS / MI0040665 / 2964
2012 p-Dichlorobenzene MR 4 SDWIS / MI0040665 / 2969

How HOLLY HILLS MHC Compares

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

Metric HOLLY HILLS MHC Michigan avg Federal benchmark
Total violations 97 23.3 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 13 2.9 Indicates a contaminant exceeded a federal MCL
PFAS detection None 27.4% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 435 830 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 10,959 regulated public water systems in Michigan.

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
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is HOLLY HILLS MHC water safe to drink? ▼
HOLLY HILLS MHC (PWS ID: MI0040665) has 97 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 435 people using Groundwater sources.
How many people does HOLLY HILLS MHC serve? ▼
HOLLY HILLS MHC serves 435 people in DENVER, Michigan. It is a Private-owned system using Groundwater water sources with 96 service connections.
What type of violations does HOLLY HILLS MHC have? ▼
HOLLY HILLS MHC has 97 total violations: 13 health-based violations (MCL exceedances or treatment failures), 84 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in HOLLY HILLS MHC water? ▼
No PFAS testing data is available for HOLLY HILLS MHC under the EPA's UCMR5 monitoring program.
What water source does HOLLY HILLS MHC use? ▼
HOLLY HILLS MHC 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.

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Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

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