Tri-county Water District
EPA ID: ND3201072 · 2,501 people served · 12 ZIP codes
ZipCheckup's reading of EPA records for Tri-county Water District (ND3201072): no drinking-water violations recorded since 2021. With no violations in its EPA file, Tri-county Water District serves 2,501 residents.
Data: EPA SDWIS
Service Area Map
Coverage area for Tri-county Water District Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Tri-county Water District have a median household income of $75,982 and about 7,942 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 80% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Tri-county Water District's water is classified in EPA records as a groundwater source. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
Infrastructure Risk
Comparable Water Systems
Similar-sized systems in North Dakota
System Overview
Tri-county Water District (EPA ID: ND3201072) is a community water system in North Dakota that serves approximately 2,501 people from groundwater sources.
This system provides water to 12 ZIP codes across 12 communities.
Violation History
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.0012 mg/L | No | 2024-12-31 |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Radon Risk in Service Area
12 of 12 ZIP records with known zones are in EPA Radon Zone 1.
The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by ND or modeled from parcel and building-footprint data.
- 58210 - Adams
- 58212 - Aneta
- 58214 - Arvilla
- 58228 - Emerado
- 58251 - Larimore
- 58256 - Manvel
- 58258 - Mekinock
- 58259 - Michigan
- 58266 - Niagara
- 58267 - Northwood
- 58344 - Lakota
- 58361 - Pekin
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Tri-county Water District (ND3201072) on EPA.gov.
Frequently Asked Questions
Is Tri-county Water District water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Tri-county Water District in the inclusive 2021-2026 record-year window. This is a compliance-record finding, not a guarantee about water at a specific tap.
How many people does Tri-county Water District serve?
Tri-county Water District serves approximately 2,501 people across 12 ZIP codes in North Dakota.
Where does Tri-county Water District get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Tri-county Water District Water Quality Report, ND. https://zipcheckup.com/water-system/nd3201072/
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