Public water system · IA0690304

Active

Terry Water Association

At a glance

Terry Water Association (PWSID IA0690304) is an active community water system in Benton County, Iowa. It reports serving 25 people through 10 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 9 violations for this system; 1 is health-based, and the most recent began in July 2024.

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

Population served

Service connections

Primary source

Groundwater

System type

CWS

Community water system

System record

PWSIDIA0690304

System typeCommunity water system

Activity statusActive

Population served25

Service connections10

Primary water sourceGroundwater

Owner typePrivate

Primacy agencyIA state drinking water program

City servedWalford

StateIowa

ZIP—

CountyBenton County

How does Terry Water Association compare with other water systems in Benton County?

By EPA's size categories, Terry Water Association is a very small system (500 people or fewer). Benton County has 23 active public water systems. Its population served is well below the county average of 826 people per system, and accounts for 0.1% of the 19,007 people reported by systems filed under the county. Across Iowa, the 1,828 active systems average 1,718 people each. Nationally, the average active community water system reports serving 6,703 people, so Terry Water Association is well below 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. Iowa has 1,084 active community water systems, 59% of the state's 1,828 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,502 Iowa systems (82%) list groundwater as their primary source.

Who owns and regulates Terry Water Association?

EPA lists Terry Water Association as privately owned. The IA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 9 of the 23 active systems in Benton County (39%) are also privately owned.

Does Terry Water Association have drinking water violations?

EPA's records list 9 violations for this system; 1 is health-based, and the most recent began in July 2024. The violations listed here began between November 2014 and July 2024. By type: 4 public notice, recordkeeping or other, 4 monitoring and reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Consumer Confidence Rule (4 of them). EPA lists 9 as resolved. 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.

Began	Violation	Contaminant or rule	Health-based	Status
2024-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
2023-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
2022-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
2020-07-01	Monitoring and reportingMonitoring, Regular · code 03	Nitritecode 1041	No	Resolved
2020-04-01	Monitoring and reportingMonitoring, Regular · code 03	Nitritecode 1041	No	Resolved
2019-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
2017-12-01	Monitoring and reportingLead Consumer Notice · code 66	Lead and Copper Rulecode 5000	No	Resolved
2015-06-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
2014-11-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved

All 9 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.

Terry Water Association: frequently asked questions

Who runs Terry Water Association?

Terry Water Association (PWSID IA0690304) is a community water system privately owned. It is regulated by the IA state drinking water program.

How many people does Terry Water Association serve?

Terry Water Association reports serving 25 people through 10 service connections in Benton County, Iowa.

Where does Terry Water Association 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 Terry Water Association have any drinking water violations?

EPA's records list 9 violations for this system; 1 is health-based, and the most recent began in July 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 Terry Water Association'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. EPA's records list 9 violations for this system; 1 is health-based, and the most recent began in July 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.

Where can I find Terry Water Association's water quality report?

As a community water system, Terry Water Association 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 Benton County

Water system	County	Population served	Type	Source
Vinton Municipal Water Dept	Benton	4,938	Community	Groundwater
Belle Plaine Water Dept	Benton	2,380	Community	Groundwater
Atkins Municipal Water Works	Benton	2,056	Community	Groundwater
Poweshiek Water Association (Cr)	Benton	2,000	Community	Purchased groundwater under influence
Urbana Water Supply	Benton	1,554	Community	Groundwater
Shellsburg Water Supply	Benton	961	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, “Terry Water Association, PWSID IA0690304, Iowa”, https://aquacensus.com/water-systems/iowa/terry-water-association-ia0690304 (data as of October 1, 2026).