Public water system · ND2800825

Active

Riverdale City of

At a glance

City of Riverdale (PWSID ND2800825) is an active community water system in McLean County, North Dakota. It reports serving 205 people through 176 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, 11 are health-based, and the most recent began in March 2012.

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

Population served

205

Service connections

176

Primary source

Surface water

System type

CWS

Community water system

System record

PWSIDND2800825

System typeCommunity water system

Activity statusActive

Population served205

Service connections176

Primary water sourceSurface water

Owner typeLocal government

Primacy agencyND state drinking water program

City servedRiverdale

StateNorth Dakota

ZIP—

CountyMcLean County

How does City of Riverdale compare with other water systems in McLean County?

By EPA's size categories, City of Riverdale is a very small system (500 people or fewer). McLean County has 13 active public water systems. Its population served is well below the county average of 746 people per system, and accounts for 2.1% of the 9,697 people reported by systems filed under the county. Across North Dakota, the 403 active systems average 1,864 people each. Nationally, the average active community water system reports serving 6,703 people, so City of Riverdale 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. North Dakota has 317 active community water systems, 79% of the state's 403 active systems. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 20 North Dakota systems (5%) list surface water as their primary source.

Who owns and regulates City of Riverdale?

EPA lists City of Riverdale as owned by a local government. The ND 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 13 active systems in McLean County (69%) are also owned by a local government.

Does City of Riverdale have drinking water violations?

Of the 12 most recent violations in EPA's records, 11 are health-based, and the most recent began in March 2012. The violations listed here began between January 2005 and March 2012. By type: 8 required treatment not met, 3 contaminant level above the legal limit and 1 monitoring and reporting. The contaminant or rule involved most often is Carbon, total (7 of them). EPA lists 11 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
2012-03-01	Required treatment not metTreatment Technique (SWTR and GWR) · code 41	Long Term 2 Enhanced Surface Water Treatment Rulecode 0800	Yes	Resolved
2010-05-01	Monitoring and reportingMonitoring, Turbidity (Enhanced SWTR) · code 38	Interim Enhanced Surface Water Treatment Rulecode 0300	No	Archived
2006-07-01	Required treatment not metTreatment Technique Precursor Removal · code 46	Carbon, totalcode 2920	Yes	Resolved
2006-04-01	Required treatment not metTreatment Technique Precursor Removal · code 46	Carbon, totalcode 2920	Yes	Resolved
2006-01-01	Required treatment not metTreatment Technique Precursor Removal · code 46	Carbon, totalcode 2920	Yes	Resolved
2005-10-01	Required treatment not metTreatment Technique Precursor Removal · code 46	Carbon, totalcode 2920	Yes	Resolved
2005-10-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Haloacetic acids (HAA5)code 2456	Yes	Resolved
2005-07-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Haloacetic acids (HAA5)code 2456	Yes	Resolved
2005-07-01	Required treatment not metTreatment Technique Precursor Removal · code 46	Carbon, totalcode 2920	Yes	Resolved
2005-04-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Haloacetic acids (HAA5)code 2456	Yes	Resolved
2005-04-01	Required treatment not metTreatment Technique Precursor Removal · code 46	Carbon, totalcode 2920	Yes	Resolved
2005-01-01	Required treatment not metTreatment Technique Precursor Removal · code 46	Carbon, totalcode 2920	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.

City of Riverdale: frequently asked questions

Who runs City of Riverdale?

City of Riverdale (PWSID ND2800825) is a community water system owned by a local government. It is regulated by the ND state drinking water program.

How many people does City of Riverdale serve?

City of Riverdale reports serving 205 people through 176 service connections in McLean County, North Dakota.

Where does City of Riverdale 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 City of Riverdale have any drinking water violations?

Of the 12 most recent violations in EPA's records, 11 are health-based, and the most recent began in March 2012. 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 City of Riverdale'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, 11 are health-based, and the most recent began in March 2012. For current results, consult the system's annual water quality report, EPA ECHO, or the ND state drinking water program.

Where can I find City of Riverdale's water quality report?

As a community water system, City of Riverdale 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 McLean County

Water system	County	Population served	Type	Source
Garrison Rural Water District	McLean	1,805	Community	Purchased surface water
Mclean-Sheridan Water District-System 1	McLean	1,800	Community	Groundwater
Garrison City of	McLean	1,453	Community	Surface water
Washburn City of	McLean	1,246	Community	Surface water
Underwood City of	McLean	778	Community	Purchased surface water
Turtle Lake City of	McLean	581	Community	Purchased groundwater

Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.

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, “Riverdale City of, PWSID ND2800825, North Dakota”, https://aquacensus.com/water-systems/north-dakota/riverdale-city-of-nd2800825 (data as of October 1, 2026).