Non-Transient Non-Community Water System · PWS IN2270805

Oak Hill JR./SR. High School

Marion, Indiana 46953 - drinking water served from groundwater sources to 860 people, tracked in EPA SDWIS and UCMR5.

Compiled by PlainWater Editorial, Drinking Water Quality Editorial Team · May 15, 2026

860
People served: 101
EPA violations: 5
Health-based: Untested
UCMR5 result

The verdict

EPA records 101 drinking-water violations at Oak Hill JR./SR. High School, 5% of them health-based - above the Indiana per-system average.

101
Total EPA violations on record: 5%
Health-based (MCL / treatment failure): 860
People served by this system: N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Oak Hill JR./SR. High School

Oak Hill JR./SR. High School is a local-owned non-transient non-community water system that delivers drinking water to 860 residents in Marion, Indiana (Grant County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 101 total violations for this system , of which 5 (5%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 96 monitoring and reporting violations are on file. The most recent violation on record dates to 2010.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 17 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 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. Statewide, 93 of 229 UCMR5-tested systems have reported PFAS detections (40.6%).

Oak Hill JR./SR. High School's 101 violations sit above the Indiana 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

860

Total Violations

101

Health-Based Violations

Water Source

Groundwater

System Details

System Type: Non-Transient Non-Community
Owner Type: Local
Connections: 1
County: Grant
School/Daycare: Yes
MCL Violations: 5
Monitoring Violations: 96
Treatment Tech Violations: 0

Violation History

Contaminant violations recorded by EPA.

Contaminant	Category	Count	Latest
Coliform (TCR)	MR	17	2006
Lead and Copper Rule	MR	16	2010
Coliform (TCR)	MCL	5	2006
Vinyl chloride	MR	3	2002
1,1-Dichloroethylene	MR	3	2002
trans-1,2-Dichloroethylene	MR	3	2002
1,1,1-Trichloroethane	MR	3	2002
Trichloroethylene	MR	3	2002
1,1,2-Trichloroethane	MR	3	2002
CHLOROBENZENE	MR	3	2002
Toluene	MR	3	2002
Ethylbenzene	MR	3	2002
Styrene	MR	3	2002
cis-1,2-Dichloroethylene	MR	3	2002
Xylenes, Total	MR	3	2002
DICHLOROMETHANE	MR	3	2002
o-Dichlorobenzene	MR	3	2002
1,2-Dichloroethane	MR	3	2002
Carbon tetrachloride	MR	3	2002
p-Dichlorobenzene	MR	3	2002
1,2-Dichloropropane	MR	3	2002
1,2,4-Trichlorobenzene	MR	3	2002
Tetrachloroethylene	MR	3	2002
Benzene	MR	3	2002

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 Oak Hill JR./SR. High School.

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 IN2270805 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 Oak Hill JR./SR. High School 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
2010	Lead and Copper Rule	MR	16	SDWIS / IN2270805 / 5000
2006	Coliform (TCR)	MR	17	SDWIS / IN2270805 / 3100
2006	Coliform (TCR)	MCL	5	SDWIS / IN2270805 / 3100
2002	Vinyl chloride	MR	3	SDWIS / IN2270805 / 2976
2002	1,1-Dichloroethylene	MR	3	SDWIS / IN2270805 / 2977
2002	trans-1,2-Dichloroethylene	MR	3	SDWIS / IN2270805 / 2979
2002	1,1,1-Trichloroethane	MR	3	SDWIS / IN2270805 / 2981
2002	Trichloroethylene	MR	3	SDWIS / IN2270805 / 2984
2002	1,1,2-Trichloroethane	MR	3	SDWIS / IN2270805 / 2985
2002	CHLOROBENZENE	MR	3	SDWIS / IN2270805 / 2989
2002	Toluene	MR	3	SDWIS / IN2270805 / 2991
2002	Ethylbenzene	MR	3	SDWIS / IN2270805 / 2992
2002	Styrene	MR	3	SDWIS / IN2270805 / 2996
2002	cis-1,2-Dichloroethylene	MR	3	SDWIS / IN2270805 / 2380
2002	Xylenes, Total	MR	3	SDWIS / IN2270805 / 2955

How Oak Hill JR./SR. High School Compares

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

Metric	Oak Hill JR./SR. High School	Indiana avg	Federal benchmark
Total violations	101	88.9	SDWA compliance, any non-zero count is a recorded breach
Health-based violations	5	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	860	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 (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 Oak Hill JR./SR. High School water safe to drink? ▼

Oak Hill JR./SR. High School (PWS ID: IN2270805) has 101 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 860 people using Groundwater sources.

How many people does Oak Hill JR./SR. High School serve? ▼

Oak Hill JR./SR. High School serves 860 people in Marion, Indiana. It is a Local-owned system using Groundwater water sources with 1 service connections.

What type of violations does Oak Hill JR./SR. High School have? ▼

Oak Hill JR./SR. High School has 101 total violations: 5 health-based violations (MCL exceedances or treatment failures), 96 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Has PFAS been detected in Oak Hill JR./SR. High School water? ▼

No PFAS testing data is available for Oak Hill JR./SR. High School under the EPA's UCMR5 monitoring program.

What water source does Oak Hill JR./SR. High School use? ▼

Oak Hill JR./SR. High School 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.

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.