Public water system · OH5702512

Active

Union City Pws

At a glance

Union City Pws (PWSID OH5702512) is an active community water system in Montgomery County, Ohio. It reports serving 7,000 people through 2,941 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in January 2020.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

7,000

Service connections

2,941

Primary source

Groundwater

System type

CWS

Community water system

System record

PWSIDOH5702512

System typeCommunity water system

Activity statusActive

Population served7,000

Service connections2,941

Primary water sourceGroundwater

Owner typeLocal government

Primacy agencyOH state drinking water program

City served—

StateOhio

ZIP—

CountyMontgomery County

How does Union City Pws compare with other water systems in Montgomery County?

By EPA's size categories, Union City Pws is a medium system (3,301 to 10,000 people). Montgomery County has 69 active public water systems. Its population served is roughly in line with the county average of 7,574 people per system, and accounts for 1.3% of the 522,570 people reported by systems filed under the county. Across Ohio, the 3,854 active systems average 2,767 people each. Nationally, the average active community water system reports serving 6,703 people, so Union City Pws is roughly in line with that figure.

What does “community water system” mean?

A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Ohio has 1,028 active community water systems, 27% of the state's 3,854 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 3,446 Ohio systems (89%) list groundwater as their primary source.

Who owns and regulates Union City Pws?

EPA lists Union City Pws as owned by a local government. The OH state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 21 of the 69 active systems in Montgomery County (30%) are also owned by a local government.

Does Union City Pws have drinking water violations?

Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in January 2020. The violations listed here began between October 1986 and January 2020. By type: 9 monitoring and reporting, 2 contaminant level above the legal limit and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Nitrate (2 of them). EPA lists 10 as resolved, 1 as unaddressed and 1 as archived. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.

Began	Violation	Contaminant or rule	Health-based	Status
2020-01-21	Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72	Consumer Confidence Rulecode 7000	No	Unaddressed
2016-01-01	Monitoring and reportingMonitoring, Regular · code 03	Nitratecode 1040	No	Resolved
1993-07-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
1993-07-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21	Total coliform bacteria (TCR)code 3100	Yes	Resolved
1986-10-04	Monitoring and reportingMonitoring, Regular · code 03	Cadmiumcode 1015	No	Resolved
1986-10-04	Monitoring and reportingMonitoring, Regular · code 03	Bariumcode 1010	No	Resolved
1986-10-04	Monitoring and reportingMonitoring, Regular · code 03	Fluoridecode 1025	No	Resolved
1986-10-04	Monitoring and reportingMonitoring, Regular · code 03	Arseniccode 1005	No	Archived
1986-10-04	Monitoring and reportingMonitoring, Regular · code 03	Seleniumcode 1045	No	Resolved
1986-10-04	Monitoring and reportingMonitoring, Regular · code 03	Nitratecode 1040	No	Resolved
1986-10-04	Monitoring and reportingMonitoring, Regular · code 03	Mercurycode 1035	No	Resolved
1986-10-04	Monitoring and reportingMonitoring, Regular · code 03	Chromiumcode 1020	No	Resolved

The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.

Union City Pws: frequently asked questions

Who runs Union City Pws?

Union City Pws (PWSID OH5702512) is a community water system owned by a local government. It is regulated by the OH state drinking water program.

How many people does Union City Pws serve?

Union City Pws reports serving 7,000 people through 2,941 service connections in Montgomery County, Ohio.

Where does Union City Pws get its water?

EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.

Does Union City Pws have any drinking water violations?

Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in January 2020. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.

Is Union City Pws' water safe to drink?

AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in January 2020. For current results, consult the system's annual water quality report, EPA ECHO, or the OH state drinking water program.

Where can I find Union City Pws' water quality report?

As a community water system, Union City Pws must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.

Other water systems in Montgomery County

Water system	County	Population served	Type	Source
Montgomery County Water Services 1 Pws	Montgomery	150,207	Community	Purchased surface water
Dayton Public Water System	Montgomery	141,407	Community	Surface water
Montgomery County Water Services 2 Pws	Montgomery	83,033	Community	Purchased surface water
Huber Heights Public Water System	Montgomery	43,439	Community	Groundwater
Miamisburg City Pws	Montgomery	19,790	Community	Groundwater
Englewood City Pws	Montgomery	13,463	Community	Groundwater

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About this data

Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.

Cite as: AquaCensus, “Union City Pws, PWSID OH5702512, Ohio”, https://aquacensus.com/water-systems/ohio/union-city-pws-oh5702512 (data as of October 1, 2026).