PlainWater
States → Ohio

Community Water System · PWS OH5502303

Miami Co-N25a Extension

Troy, Ohio 45373 - drinking water served from groundwater sources to 2,367 people, tracked in EPA SDWIS and UCMR5.

2,367
People served
11
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 11 drinking-water violations at Miami Co-N25a Extension - below the Ohio per-system average.

11
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
2,367
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Miami Co-N25a Extension

Miami Co-N25a Extension is a private-owned community water system that delivers drinking water to 2,367 residents in Troy, Ohio (Miami County) through 64 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 11 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 9 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 Coliform (TCR), recorded in 4 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%).

Miami Co-N25a Extension's 11 violations sit below 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
2,367
Total Violations
11
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
64
County
Miami
School/Daycare
No
MCL Violations
0
Monitoring Violations
9
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 4 1995
Lead and Copper Rule MR 3 1996
Total Haloacetic Acids (HAA5) MR 2 2024
Consumer Confidence Rule Other 2 2023

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 Miami Co-N25a Extension.

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 OH5502303 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 Miami Co-N25a Extension 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 Total Haloacetic Acids (HAA5) MR 2 SDWIS / OH5502303 / 2456
2023 Consumer Confidence Rule Other 2 SDWIS / OH5502303 / 7000
1996 Lead and Copper Rule MR 3 SDWIS / OH5502303 / 5000
1995 Coliform (TCR) MR 4 SDWIS / OH5502303 / 3100

How Miami Co-N25a Extension Compares

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

Metric Miami Co-N25a Extension Ohio avg Federal benchmark
Total violations 11 69 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 0 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 2,367 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 Miami Co-N25a Extension water safe to drink? ▼
Miami Co-N25a Extension (PWS ID: OH5502303) has 11 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 2,367 people using Groundwater sources.
How many people does Miami Co-N25a Extension serve? ▼
Miami Co-N25a Extension serves 2,367 people in Troy, Ohio. It is a Private-owned system using Groundwater water sources with 64 service connections.
What type of violations does Miami Co-N25a Extension have? ▼
Miami Co-N25a Extension has 11 total violations: 0 health-based violations (MCL exceedances or treatment failures), 9 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Miami Co-N25a Extension water? ▼
No PFAS testing data is available for Miami Co-N25a Extension under the EPA's UCMR5 monitoring program.
What water source does Miami Co-N25a Extension use? ▼
Miami Co-N25a Extension 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.