Public water system · IA9260090
ActiveRiverside Water Supply
At a glance
Riverside Water Supply (PWSID IA9260090) is an active community water system in Washington County, Iowa. It reports serving 1,060 people through 520 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 5 violations for this system; 1 is health-based, and the most recent began in July 2022.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,060
Service connections
520
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Riverside Water Supply compare with other water systems in Washington County?
By EPA's size categories, Riverside Water Supply is a small system (501 to 3,300 people). Washington County has 24 active public water systems, and Riverside Water Supply is the 4th-largest of them by population served. Its population served is about 58% above the county average of 670 people per system, and accounts for 6.6% of the 16,082 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 Riverside Water Supply 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 Riverside Water Supply?
EPA lists Riverside Water Supply as owned by a local government. 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 24 active systems in Washington County (38%) are also owned by a local government.
Does Riverside Water Supply have drinking water violations?
EPA's records list 5 violations for this system; 1 is health-based, and the most recent began in July 2022. The violations listed here began between February 1994 and July 2022. By type: 4 monitoring and reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 4 as resolved 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. 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 |
|---|---|---|---|---|
| 2022-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2013-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Radium (-226 and -228)code 4010 | No | Archived |
| 2013-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2002-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Arseniccode 1005 | No | Resolved |
| 1994-02-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 5 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.
Riverside Water Supply: frequently asked questions
Who runs Riverside Water Supply?
Riverside Water Supply (PWSID IA9260090) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Riverside Water Supply serve?
Riverside Water Supply reports serving 1,060 people through 520 service connections in Washington County, Iowa.
Where does Riverside Water Supply 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 Riverside Water Supply have any drinking water violations?
EPA's records list 5 violations for this system; 1 is health-based, and the most recent began in July 2022. 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 Riverside Water Supply'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 5 violations for this system; 1 is health-based, and the most recent began in July 2022. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Riverside Water Supply's water quality report?
As a community water system, Riverside Water Supply 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 Washington County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Washington Water Department | Washington | 7,362 | Community | Groundwater |
| Kalona Water Dept | Washington | 2,630 | Community | Groundwater |
| Wellman Municipal Waterworks | Washington | 1,524 | Community | Groundwater |
| Brighton Municipal Water Supply | Washington | 600 | Community | Groundwater |
| Ainsworth Water Works | Washington | 511 | Community | Groundwater |
| Highland High School | Washington | 405 | Non-transient non-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, “Riverside Water Supply, PWSID IA9260090, Iowa”, https://aquacensus.com/water-systems/iowa/riverside-water-supply-ia9260090 (data as of October 1, 2026).