Transient Non-Community Water System · PWS OH0253512

St John the Baptist Catholic Church

Delphos, Ohio 45833-9458 - drinking water served from groundwater sources to 155 people, tracked in EPA SDWIS and UCMR5.

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

155
People served: 287
EPA violations: 18
Health-based: Untested
UCMR5 result

The verdict

EPA records 287 drinking-water violations at St John the Baptist Catholic Church, 6% of them health-based - above the Ohio per-system average.

287
Total EPA violations on record: 6%
Health-based (MCL / treatment failure): 155
People served by this system: N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: St John the Baptist Catholic Church

St John the Baptist Catholic Church is a private-owned transient non-community water system that delivers drinking water to 155 residents in Delphos, Ohio (Allen County) through 3 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 287 total violations for this system , of which 18 (6%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 267 monitoring and reporting violations are on file. The most recent violation on record dates to 2021.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 18 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 Ohio, EPA tracks 4,181 public water systems serving 11,085,226 people, with 288,388 cumulative violations and 52,412 health-based violations on record. About 90% of systems in the state carry at least one violation, and state-wide the average per system is 69 violations. Statewide, 204 of 346 UCMR5-tested systems have reported PFAS detections (59%).

St John the Baptist Catholic Church's 287 violations sit above the Ohio 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

155

Total Violations

287

Health-Based Violations

Water Source

Groundwater

System Details

System Type: Transient Non-Community
Owner Type: Private
Connections: 3
County: Allen
School/Daycare: Yes
MCL Violations: 18
Monitoring Violations: 267
Treatment Tech Violations: 0

Violation History

Contaminant violations recorded by EPA.

Contaminant	Category	Count	Latest
Coliform (TCR)	MCL	18	2000
Xylenes, Total	MR	12	2001
1,1,1-Trichloroethane	MR	12	2001
1,2-Dichloropropane	MR	12	2001
Benzene	MR	12	2001
DICHLOROMETHANE	MR	12	2001
Vinyl chloride	MR	12	2001
1,2-Dichloroethane	MR	12	2001
Ethylbenzene	MR	12	2001
1,1-Dichloroethylene	MR	12	2001
Carbon tetrachloride	MR	12	2001
Toluene	MR	12	2001
trans-1,2-Dichloroethylene	MR	12	2001
o-Dichlorobenzene	MR	12	2001
1,1,2-Trichloroethane	MR	12	2001
cis-1,2-Dichloroethylene	MR	12	2001
CHLOROBENZENE	MR	12	2001
1,2,4-Trichlorobenzene	MR	12	2001
Styrene	MR	12	2001
Tetrachloroethylene	MR	12	2001
Trichloroethylene	MR	12	2001
p-Dichlorobenzene	MR	12	2001
Revised Total Coliform Rule	MON	11	2021
Coliform (TCR)	MR	4	2000
Public Notice	Other	2	2021

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 St John the Baptist Catholic Church.

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 OH0253512 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Ohio Drinking Water Authority

Ohio EPA, Division of Drinking and Ground Waters is the primacy agency that licenses and inspects St John the Baptist Catholic Church under EPA-delegated authority.

Open OH regulator portal

Source: Ohio EPA, Division of Drinking and Ground Waters

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
2021	Revised Total Coliform Rule	MON	11	SDWIS / OH0253512 / 8000
2021	Public Notice	Other	2	SDWIS / OH0253512 / 7500
2001	Xylenes, Total	MR	12	SDWIS / OH0253512 / 2955
2001	1,1,1-Trichloroethane	MR	12	SDWIS / OH0253512 / 2981
2001	1,2-Dichloropropane	MR	12	SDWIS / OH0253512 / 2983
2001	Benzene	MR	12	SDWIS / OH0253512 / 2990
2001	DICHLOROMETHANE	MR	12	SDWIS / OH0253512 / 2964
2001	Vinyl chloride	MR	12	SDWIS / OH0253512 / 2976
2001	1,2-Dichloroethane	MR	12	SDWIS / OH0253512 / 2980
2001	Ethylbenzene	MR	12	SDWIS / OH0253512 / 2992
2001	1,1-Dichloroethylene	MR	12	SDWIS / OH0253512 / 2977
2001	Carbon tetrachloride	MR	12	SDWIS / OH0253512 / 2982
2001	Toluene	MR	12	SDWIS / OH0253512 / 2991
2001	trans-1,2-Dichloroethylene	MR	12	SDWIS / OH0253512 / 2979
2001	o-Dichlorobenzene	MR	12	SDWIS / OH0253512 / 2968

How St John the Baptist Catholic Church Compares

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

Metric	St John the Baptist Catholic Church	Ohio avg	Federal benchmark
Total violations	287	69	SDWA compliance, any non-zero count is a recorded breach
Health-based violations	18	12.5	Indicates a contaminant exceeded a federal MCL
PFAS detection	None	59%	EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served	155	2,651	Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 4,181 regulated public water systems in Ohio.

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 St John the Baptist Catholic Church water safe to drink? ▼

St John the Baptist Catholic Church (PWS ID: OH0253512) has 287 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 155 people using Groundwater sources.

How many people does St John the Baptist Catholic Church serve? ▼

St John the Baptist Catholic Church serves 155 people in Delphos, Ohio. It is a Private-owned system using Groundwater water sources with 3 service connections.

What type of violations does St John the Baptist Catholic Church have? ▼

St John the Baptist Catholic Church has 287 total violations: 18 health-based violations (MCL exceedances or treatment failures), 267 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Has PFAS been detected in St John the Baptist Catholic Church water? ▼

No PFAS testing data is available for St John the Baptist Catholic Church under the EPA's UCMR5 monitoring program.

What water source does St John the Baptist Catholic Church use? ▼

St John the Baptist Catholic Church uses Groundwater as its primary water source. It is classified as a Transient Non-Community Water System, serving transient populations.

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.