Public water system · TN0000174

Active

Dayton Water Dept

At a glance

Dayton Water Dept (PWSID TN0000174) is an active community water system in Rhea County, Tennessee. It reports serving 25,054 people through 9,636 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, 7 are health-based, and the most recent began in January 2024.

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

Population served

25,054

Service connections

9,636

Primary source

Surface water

System type

CWS

Community water system

System record

PWSIDTN0000174

System typeCommunity water system

Activity statusActive

Population served25,054

Service connections9,636

Primary water sourceSurface water

Owner typeLocal government

Primacy agencyTN state drinking water program

City servedDayton

StateTennessee

ZIP—

CountyRhea County

How does Dayton Water Dept compare with other water systems in Rhea County?

By EPA's size categories, Dayton Water Dept is a large system (10,001 to 100,000 people). Rhea County has 7 active public water systems, and Dayton Water Dept is the largest of them by population served. Its population served is about 3.4 times the county average of 7,357 people per system, and accounts for 49% of the 51,498 people reported by systems filed under the county. Across Tennessee, the 1,383 active systems average 5,780 people each. Nationally, the average active community water system reports serving 6,703 people, so Dayton Water Dept is about 3.7 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. Tennessee has 450 active community water systems, 33% of the state's 1,383 active systems. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 151 Tennessee systems (11%) list surface water as their primary source.

Who owns and regulates Dayton Water Dept?

EPA lists Dayton Water Dept as owned by a local government. The TN state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 6 of the 7 active systems in Rhea County (86%) are also owned by a local government.

Does Dayton Water Dept have drinking water violations?

Of the 12 most recent violations in EPA's records, 7 are health-based, and the most recent began in January 2024. The violations listed here began between October 2015 and January 2024. By type: 7 contaminant level above the legal limit, 3 monitoring and reporting and 2 public notice, recordkeeping or other. The contaminant or rule involved most often is Haloacetic acids (HAA5) (5 of them). EPA lists 11 as resolved and 1 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
2024-01-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Haloacetic acids (HAA5)code 2456	Yes	Resolved
2021-01-01	Monitoring and reportingLead Consumer Notice · code 66	Lead and Copper Rulecode 5000	No	Resolved
2020-10-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Total trihalomethanes (TTHM)code 2950	No	Resolved
2020-10-01	Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72	Consumer Confidence Rulecode 7000	No	Resolved
2020-10-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	No	Resolved
2017-08-13	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Unaddressed
2016-04-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Total trihalomethanes (TTHM)code 2950	Yes	Resolved
2016-04-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Haloacetic acids (HAA5)code 2456	Yes	Resolved
2016-01-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Haloacetic acids (HAA5)code 2456	Yes	Resolved
2016-01-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Total trihalomethanes (TTHM)code 2950	Yes	Resolved
2015-10-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Total trihalomethanes (TTHM)code 2950	Yes	Resolved
2015-10-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Haloacetic acids (HAA5)code 2456	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.

Dayton Water Dept: frequently asked questions

Who runs Dayton Water Dept?

Dayton Water Dept (PWSID TN0000174) is a community water system owned by a local government. It is regulated by the TN state drinking water program.

How many people does Dayton Water Dept serve?

Dayton Water Dept reports serving 25,054 people through 9,636 service connections in Rhea County, Tennessee.

Where does Dayton Water Dept 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 Dayton Water Dept have any drinking water violations?

Of the 12 most recent violations in EPA's records, 7 are health-based, and the most recent began in January 2024. 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 Dayton Water Dept's 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, 7 are health-based, and the most recent began in January 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the TN state drinking water program.

Where can I find Dayton Water Dept's water quality report?

As a community water system, Dayton Water Dept 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 Rhea County

Water system	County	Population served	Type	Source
Watts Bar Utility District	Rhea	15,571	Community	Purchased surface water
North U.D. of Rhea County	Rhea	3,640	Community	Purchased surface water
Spring City Water System	Rhea	2,985	Community	Surface water
Grandview Utility District	Rhea	2,226	Community	Purchased surface water
Graysville Water Dept	Rhea	1,872	Community	Groundwater
Laurelbrook School	Rhea	150	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, “Dayton Water Dept, PWSID TN0000174, Tennessee”, https://aquacensus.com/water-systems/tennessee/dayton-water-dept-tn0000174 (data as of October 1, 2026).