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Community Water System · PWS OH5501912

Northwoods Mhc

Mansfield, Ohio 44906 - drinking water served from groundwater sources to 70 people, tracked in EPA SDWIS and UCMR5.

70
People served
485
EPA violations
41
Health-based
Untested
UCMR5 result

The verdict

EPA records 485 drinking-water violations at Northwoods Mhc, 8% of them health-based - above the Ohio per-system average.

485
Total EPA violations on record
8%
Health-based (MCL / treatment failure)
70
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Northwoods Mhc

Northwoods Mhc is a private-owned community water system that delivers drinking water to 70 residents in Mansfield, Ohio (Miami County) through 56 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 485 total violations for this system , of which 41 (8%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 429 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 Arsenic, recorded in 29 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. Statewide, 204 of 346 UCMR5-tested systems have reported PFAS detections (59%).

Northwoods Mhc's 485 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
70
Total Violations
485
Health-Based Violations
41
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
56
County
Miami
School/Daycare
No
MCL Violations
37
Monitoring Violations
429
Treatment Tech Violations
4

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Arsenic MR 29 2010
Arsenic MCL 26 2017
Nitrate MR 23 2013
Chromium MR 12 2003
Mercury MR 12 2003
Cadmium MR 12 2003
Barium MR 12 2003
Selenium MR 12 2003
Coliform (TCR) MCL 11 2009
1,1,1-Trichloroethane MR 11 2003
Tetrachloroethylene MR 11 2003
1,1-Dichloroethylene MR 11 2003
Trichloroethylene MR 11 2003
trans-1,2-Dichloroethylene MR 11 2003
o-Dichlorobenzene MR 11 2003
p-Dichlorobenzene MR 11 2003
1,1,2-Trichloroethane MR 11 2003
1,2-Dichloropropane MR 11 2003
CHLOROBENZENE MR 11 2003
Benzene MR 11 2003
1,2-Dichloroethane MR 11 2003
Carbon tetrachloride MR 11 2003
Toluene MR 11 2003
1,2,4-Trichlorobenzene MR 11 2003
Ethylbenzene MR 11 2003
cis-1,2-Dichloroethylene MR 11 2003
DICHLOROMETHANE MR 11 2003
Styrene MR 11 2003
Vinyl chloride MR 11 2003
Xylenes, Total MR 11 2003

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 Northwoods Mhc.

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 OH5501912 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 Northwoods Mhc 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 / OH5501912 / 5200
2024 LEAD AND COPPER RULE REVISIONS TT 4 SDWIS / OH5501912 / 5200
2019 Consumer Confidence Rule Other 3 SDWIS / OH5501912 / 7000
2017 Arsenic MCL 26 SDWIS / OH5501912 / 1005
2016 Revised Total Coliform Rule MON 8 SDWIS / OH5501912 / 8000
2015 Lead and Copper Rule MR 9 SDWIS / OH5501912 / 5000
2015 Coliform (TCR) MR 8 SDWIS / OH5501912 / 3100
2013 Nitrate MR 23 SDWIS / OH5501912 / 1040
2013 TTHM MR 4 SDWIS / OH5501912 / 2950
2013 Total Haloacetic Acids (HAA5) MR 4 SDWIS / OH5501912 / 2456
2010 Arsenic MR 29 SDWIS / OH5501912 / 1005
2009 Coliform (TCR) MCL 11 SDWIS / OH5501912 / 3100
2006 Gross Alpha, Excl. Radon and U MR 9 SDWIS / OH5501912 / 4000
2006 Radium-228 MR 4 SDWIS / OH5501912 / 4030
2003 Chromium MR 12 SDWIS / OH5501912 / 1020

How Northwoods Mhc Compares

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

Metric Northwoods Mhc Ohio avg Federal benchmark
Total violations 485 69 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 41 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 70 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 Northwoods Mhc water safe to drink? ▼
Northwoods Mhc (PWS ID: OH5501912) has 485 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 70 people using Groundwater sources.
How many people does Northwoods Mhc serve? ▼
Northwoods Mhc serves 70 people in Mansfield, Ohio. It is a Private-owned system using Groundwater water sources with 56 service connections.
What type of violations does Northwoods Mhc have? ▼
Northwoods Mhc has 485 total violations: 41 health-based violations (MCL exceedances or treatment failures), 429 monitoring/reporting violations, and 4 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Northwoods Mhc water? ▼
No PFAS testing data is available for Northwoods Mhc under the EPA's UCMR5 monitoring program.
What water source does Northwoods Mhc use? ▼
Northwoods Mhc 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.
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.