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WALNUT CREEK WATER CO.

PWS ID: OH3801512 · WALNUT CREEK, Ohio 44687

WALNUT CREEK WATER CO. serves 1,270 people in WALNUT CREEK, Ohio using Groundwater water sources. It has 322 recorded EPA violations, including 9 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: WALNUT CREEK WATER CO.

WALNUT CREEK WATER CO. is a private-owned community water system that delivers drinking water to 1,270 residents in WALNUT CREEK, Ohio (Holmes County) through 396 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 322 total violations for this system , of which 9 (3%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 302 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Chromium, recorded in 10 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 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. WALNUT CREEK WATER CO.'s 322 violations sit above the Ohio average. Statewide, 204 of 346 UCMR5-tested systems have reported PFAS detections (59%). 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
1,270
Total Violations
322
Health-Based Violations
9
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
396
County
Holmes
School/Daycare
No
MCL Violations
5
Monitoring Violations
302
Treatment Tech Violations
4

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Chromium MR 10 2003
Mercury MR 10 2003
Fluoride MR 10 2003
Selenium MR 10 2003
Cadmium MR 10 2003
Barium MR 10 2003
Coliform (TCR) MR 8 1995
Arsenic MR 8 2003
Antimony, Total MR 7 2003
Beryllium, Total MR 7 2003
Nickel MR 7 2003
Nitrate MR 7 2003
Thallium, Total MR 7 2003
Lead and Copper Rule MR 5 2011
Coliform (TCR) MCL 5 2012
Methoxychlor MR 4 1994
Dalapon MR 4 1994
Endothall MR 4 1994
Di(2-ethylhexyl) adipate MR 4 1994
OXAMYL MR 4 1994
Dinoseb MR 4 1994
Aldicarb sulfoxide MR 4 1994
Aldicarb sulfone MR 4 1994
Carbofuran MR 4 1994
LASSO MR 4 1994
Heptachlor epoxide MR 4 1994
2,4,5-TP MR 4 1994
HEXACHLOROBENZENE MR 4 1994
Pentachlorophenol MR 4 1994
Total Polychlorinated Biphenyls (PCB) MR 4 1994

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 WALNUT CREEK WATER 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 OH3801512 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 WALNUT CREEK WATER CO. 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
2024 LEAD AND COPPER RULE REVISIONS RPT 4 SDWIS / OH3801512 / 5200
2024 LEAD AND COPPER RULE REVISIONS TT 4 SDWIS / OH3801512 / 5200
2022 Consumer Confidence Rule Other 3 SDWIS / OH3801512 / 7000
2012 Coliform (TCR) MCL 5 SDWIS / OH3801512 / 3100
2011 Lead and Copper Rule MR 5 SDWIS / OH3801512 / 5000
2003 Chromium MR 10 SDWIS / OH3801512 / 1020
2003 Mercury MR 10 SDWIS / OH3801512 / 1035
2003 Fluoride MR 10 SDWIS / OH3801512 / 1025
2003 Selenium MR 10 SDWIS / OH3801512 / 1045
2003 Cadmium MR 10 SDWIS / OH3801512 / 1015
2003 Barium MR 10 SDWIS / OH3801512 / 1010
2003 Arsenic MR 8 SDWIS / OH3801512 / 1005
2003 Antimony, Total MR 7 SDWIS / OH3801512 / 1074
2003 Beryllium, Total MR 7 SDWIS / OH3801512 / 1075
2003 Nickel MR 7 SDWIS / OH3801512 / 1036

How WALNUT CREEK WATER CO. Compares

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

Metric WALNUT CREEK WATER CO. Ohio avg Federal benchmark
Total violations 322 69 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 9 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 1,270 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
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is WALNUT CREEK WATER CO. water safe to drink? ▼
WALNUT CREEK WATER CO. (PWS ID: OH3801512) has 322 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,270 people using Groundwater sources.
How many people does WALNUT CREEK WATER CO. serve? ▼
WALNUT CREEK WATER CO. serves 1,270 people in WALNUT CREEK, Ohio. It is a Private-owned system using Groundwater water sources with 396 service connections.
What type of violations does WALNUT CREEK WATER CO. have? ▼
WALNUT CREEK WATER CO. has 322 total violations: 9 health-based violations (MCL exceedances or treatment failures), 302 monitoring/reporting violations, and 4 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in WALNUT CREEK WATER CO. water? ▼
No PFAS testing data is available for WALNUT CREEK WATER CO. under the EPA's UCMR5 monitoring program.
What water source does WALNUT CREEK WATER CO. use? ▼
WALNUT CREEK WATER CO. 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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