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LAKE HILL PARK - THAYER INC.

PWS ID: IN5291007 · MONON, Indiana 47959-9738

LAKE HILL PARK - THAYER INC. serves 104 people in MONON, Indiana using Groundwater water sources. It has 105 recorded EPA violations, including 0 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: LAKE HILL PARK - THAYER INC.

LAKE HILL PARK - THAYER INC. is a private-owned community water system that delivers drinking water to 104 residents in MONON, Indiana (White County) through 81 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 105 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 91 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 Consumer Confidence Rule, recorded in 12 violations (Other). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Indiana, EPA tracks 3,967 public water systems serving 5,774,616 people, with 352,710 cumulative violations and 35,932 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 88.9 violations. LAKE HILL PARK - THAYER INC.'s 105 violations sit above the Indiana average. Statewide, 93 of 229 UCMR5-tested systems have reported PFAS detections (40.6%). 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
104
Total Violations
105
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
81
County
White
School/Daycare
No
MCL Violations
0
Monitoring Violations
91
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Consumer Confidence Rule Other 12 2025
Coliform (TCR) MR 7 2002
Gross Alpha, Excl. Radon and U MR 5 2018
Radium-228 MR 4 2018
Toluene MR 2 1994
Ethylbenzene MR 2 1994
1,2-Dichloropropane MR 2 1994
DICHLOROMETHANE MR 2 1994
trans-1,2-Dichloroethylene MR 2 1994
Nitrate MR 2 1993
CHLOROBENZENE MR 2 1994
Carbon tetrachloride MR 2 1994
Benzene MR 2 1994
Trichloroethylene MR 2 1994
1,1,2-Trichloroethane MR 2 1994
1,1,1-Trichloroethane MR 2 1994
1,2,4-Trichlorobenzene MR 2 1994
cis-1,2-Dichloroethylene MR 2 1994
Vinyl chloride MR 2 1994
Tetrachloroethylene MR 2 1994
o-Dichlorobenzene MR 2 1994
1,2-Dichloroethane MR 2 1994
Styrene MR 2 1994
p-Dichlorobenzene MR 2 1994
1,1-Dichloroethylene MR 2 1994
Endothall MR 1 1995
ETHYLENE DIBROMIDE MR 1 1995
Heptachlor MR 1 1995
Heptachlor epoxide MR 1 1995
LASSO MR 1 1995

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 HILL PARK - THAYER 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 IN5291007 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Indiana Drinking Water Authority

Indiana Department of Environmental Management — Drinking Water Branch is the primacy agency that licenses and inspects LAKE HILL PARK - THAYER INC. under EPA-delegated authority.

Open IN regulator portal

Source: Indiana Department of Environmental Management — 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 12 SDWIS / IN5291007 / 7000
2018 Gross Alpha, Excl. Radon and U MR 5 SDWIS / IN5291007 / 4000
2018 Radium-228 MR 4 SDWIS / IN5291007 / 4030
2002 Coliform (TCR) MR 7 SDWIS / IN5291007 / 3100
1995 Endothall MR 1 SDWIS / IN5291007 / 2033
1995 ETHYLENE DIBROMIDE MR 1 SDWIS / IN5291007 / 2946
1995 Heptachlor MR 1 SDWIS / IN5291007 / 2065
1995 Heptachlor epoxide MR 1 SDWIS / IN5291007 / 2067
1995 LASSO MR 1 SDWIS / IN5291007 / 2051
1995 HEXACHLOROBENZENE MR 1 SDWIS / IN5291007 / 2274
1995 BHC-GAMMA MR 1 SDWIS / IN5291007 / 2010
1995 Methoxychlor MR 1 SDWIS / IN5291007 / 2015
1995 Picloram MR 1 SDWIS / IN5291007 / 2040
1995 Total Polychlorinated Biphenyls (PCB) MR 1 SDWIS / IN5291007 / 2383
1995 Pentachlorophenol MR 1 SDWIS / IN5291007 / 2326

How LAKE HILL PARK - THAYER INC. Compares

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

Metric LAKE HILL PARK - THAYER INC. Indiana avg Federal benchmark
Total violations 105 88.9 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 0 9.1 Indicates a contaminant exceeded a federal MCL
PFAS detection None 40.6% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 104 1,456 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 3,967 regulated public water systems in Indiana.

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 LAKE HILL PARK - THAYER INC. water safe to drink? ▼
LAKE HILL PARK - THAYER INC. (PWS ID: IN5291007) has 105 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 104 people using Groundwater sources.
How many people does LAKE HILL PARK - THAYER INC. serve? ▼
LAKE HILL PARK - THAYER INC. serves 104 people in MONON, Indiana. It is a Private-owned system using Groundwater water sources with 81 service connections.
What type of violations does LAKE HILL PARK - THAYER INC. have? ▼
LAKE HILL PARK - THAYER INC. has 105 total violations: 0 health-based violations (MCL exceedances or treatment failures), 91 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in LAKE HILL PARK - THAYER INC. water? ▼
No PFAS testing data is available for LAKE HILL PARK - THAYER INC. under the EPA's UCMR5 monitoring program.
What water source does LAKE HILL PARK - THAYER INC. use? ▼
LAKE HILL PARK - THAYER 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.

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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.

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