Public water system · OH5501211

Active

Piqua City Pws

At a glance

Piqua City Pws (PWSID OH5501211) is an active community water system in Miami County, Ohio. It reports serving 20,354 people through 8,824 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 6 are health-based, and the most recent began in July 2025.

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

Population served

20,354

Service connections

8,824

Primary source

Surface water

System type

CWS

Community water system

System record

PWSIDOH5501211

System typeCommunity water system

Activity statusActive

Population served20,354

Service connections8,824

Primary water sourceSurface water

Owner typeLocal government

Primacy agencyOH state drinking water program

City served—

StateOhio

ZIP—

CountyMiami County

How does Piqua City Pws compare with other water systems in Miami County?

By EPA's size categories, Piqua City Pws is a large system (10,001 to 100,000 people). Miami County has 46 active public water systems, and Piqua City Pws is the 3rd-largest of them by population served. Its population served is about 10 times the county average of 1,981 people per system, and accounts for 22% of the 91,109 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 Piqua City Pws is about 3 times 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. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 102 Ohio systems (2.6%) list surface water as their primary source.

Who owns and regulates Piqua City Pws?

EPA lists Piqua 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. 10 of the 46 active systems in Miami County (22%) are also owned by a local government.

Does Piqua City Pws have drinking water violations?

Of the 12 most recent violations in EPA's records, 6 are health-based, and the most recent began in July 2025. The violations listed here began between August 2008 and July 2025. By type: 4 public notice, recordkeeping or other, 4 contaminant level above the legal limit, 2 required treatment not met, 1 reporting and 1 monitoring and reporting. The contaminant or rule involved most often is Total trihalomethanes (TTHM) (4 of them). EPA lists 9 as resolved and 3 as unaddressed. 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.

Began	Violation	Contaminant or rule	Health-based	Status
2025-07-02	ReportingNotification, Known or Potential LSL · code 4H	Lead and Copper Rule Revisionscode 5200	No	Resolved
2022-08-25	Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72	Consumer Confidence Rulecode 7000	No	Unaddressed
2022-08-17	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2021-04-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	No	Resolved
2020-10-08	Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72	Consumer Confidence Rulecode 7000	No	Unaddressed
2020-01-28	Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72	Consumer Confidence Rulecode 7000	No	Unaddressed
2015-07-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Total trihalomethanes (TTHM)code 2950	Yes	Resolved
2012-01-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Total trihalomethanes (TTHM)code 2950	Yes	Resolved
2011-10-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Total trihalomethanes (TTHM)code 2950	Yes	Resolved
2011-04-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Total trihalomethanes (TTHM)code 2950	Yes	Resolved
2008-12-01	Required treatment not metTreatment Technique (SWTR and GWR) · code 41	Surface Water Treatment Rulecode 0200	Yes	Resolved
2008-08-01	Required treatment not metTreatment Technique (SWTR and GWR) · code 41	Surface Water Treatment Rulecode 0200	Yes	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.

Piqua City Pws: frequently asked questions

Who runs Piqua City Pws?

Piqua City Pws (PWSID OH5501211) is a community water system owned by a local government. It is regulated by the OH state drinking water program.

How many people does Piqua City Pws serve?

Piqua City Pws reports serving 20,354 people through 8,824 service connections in Miami County, Ohio.

Where does Piqua City Pws get its water?

EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.

Does Piqua City Pws have any drinking water violations?

Of the 12 most recent violations in EPA's records, 6 are health-based, and the most recent began in July 2025. 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 Piqua 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, 6 are health-based, and the most recent began in July 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the OH state drinking water program.

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

As a community water system, Piqua 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 Miami County

Water system	County	Population served	Type	Source
Nawa	Miami	29,974	Community	Groundwater
Troy City Pws	Miami	26,305	Community	Groundwater
West Milton Village Pws	Miami	4,890	Community	Purchased groundwater
Covington Village Pws	Miami	2,718	Community	Groundwater
Miami East Schools Pws	Miami	1,430	Non-transient non-community	Groundwater
Pleasant Hill Village Pws	Miami	1,226	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, “Piqua City Pws, PWSID OH5501211, Ohio”, https://aquacensus.com/water-systems/ohio/piqua-city-pws-oh5501211 (data as of October 1, 2026).