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OSCAR W LARSON CO

PWS ID: MI2018663 · CLARKSTON, Michigan 48348

OSCAR W LARSON CO serves 120 people in CLARKSTON, Michigan using Groundwater water sources. It has 52 recorded EPA violations, including 0 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: OSCAR W LARSON CO

OSCAR W LARSON CO is a private-owned non-transient non-community water system that delivers drinking water to 120 residents in CLARKSTON, Michigan (Oakland County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 52 total violations for this system , of which 0 (0%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 47 monitoring and reporting violations are on file. The most recent violation on record dates to 2000.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 3 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 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. OSCAR W LARSON CO's 52 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
120
Total Violations
52
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Private
Connections
1
County
Oakland
School/Daycare
No
MCL Violations
0
Monitoring Violations
47
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 3 1996
1,2-Dichloroethane MR 2 2000
1,1,1-Trichloroethane MR 2 2000
Carbon tetrachloride MR 2 2000
1,2-Dichloropropane MR 2 2000
1,1,2-Trichloroethane MR 2 2000
Tetrachloroethylene MR 2 2000
Benzene MR 2 2000
cis-1,2-Dichloroethylene MR 2 2000
Ethylbenzene MR 2 2000
o-Dichlorobenzene MR 2 2000
Vinyl chloride MR 2 2000
Xylenes, Total MR 2 2000
Toluene MR 2 2000
DICHLOROMETHANE MR 2 2000
1,2,4-Trichlorobenzene MR 2 2000
Trichloroethylene MR 2 2000
trans-1,2-Dichloroethylene MR 2 2000
Styrene MR 2 2000
Lead and Copper Rule MR 2 1996
p-Dichlorobenzene MR 2 2000
CHLOROBENZENE MR 2 2000
1,1-Dichloroethylene MR 2 2000

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 OSCAR W LARSON CO.

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 MI2018663 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 OSCAR W LARSON CO 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
2000 1,2-Dichloroethane MR 2 SDWIS / MI2018663 / 2980
2000 1,1,1-Trichloroethane MR 2 SDWIS / MI2018663 / 2981
2000 Carbon tetrachloride MR 2 SDWIS / MI2018663 / 2982
2000 1,2-Dichloropropane MR 2 SDWIS / MI2018663 / 2983
2000 1,1,2-Trichloroethane MR 2 SDWIS / MI2018663 / 2985
2000 Tetrachloroethylene MR 2 SDWIS / MI2018663 / 2987
2000 Benzene MR 2 SDWIS / MI2018663 / 2990
2000 cis-1,2-Dichloroethylene MR 2 SDWIS / MI2018663 / 2380
2000 Ethylbenzene MR 2 SDWIS / MI2018663 / 2992
2000 o-Dichlorobenzene MR 2 SDWIS / MI2018663 / 2968
2000 Vinyl chloride MR 2 SDWIS / MI2018663 / 2976
2000 Xylenes, Total MR 2 SDWIS / MI2018663 / 2955
2000 Toluene MR 2 SDWIS / MI2018663 / 2991
2000 DICHLOROMETHANE MR 2 SDWIS / MI2018663 / 2964
2000 1,2,4-Trichlorobenzene MR 2 SDWIS / MI2018663 / 2378

How OSCAR W LARSON CO Compares

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

Metric OSCAR W LARSON CO Michigan avg Federal benchmark
Total violations 52 23.3 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 0 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 120 830 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 OSCAR W LARSON CO water safe to drink? ▼
OSCAR W LARSON CO (PWS ID: MI2018663) has 52 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 120 people using Groundwater sources.
How many people does OSCAR W LARSON CO serve? ▼
OSCAR W LARSON CO serves 120 people in CLARKSTON, Michigan. It is a Private-owned system using Groundwater water sources with 1 service connections.
What type of violations does OSCAR W LARSON CO have? ▼
OSCAR W LARSON CO has 52 total violations: 0 health-based violations (MCL exceedances or treatment failures), 47 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in OSCAR W LARSON CO water? ▼
No PFAS testing data is available for OSCAR W LARSON CO under the EPA's UCMR5 monitoring program.
What water source does OSCAR W LARSON CO use? ▼
OSCAR W LARSON CO uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.
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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