Grant Creek Water Users Association Inc.
EPA ID: MT0003305 · 380 people served · 1 ZIP code
ZipCheckup's reading of EPA records for Grant Creek Water Users Association Inc. (MT0003305): no drinking-water violations recorded since 2021. Within the EPA records available for it, Grant Creek Water Users Association Inc. shows no violations; the system serves about 380 people.
Data: EPA SDWIS
Service Area Map
Coverage area for Grant Creek Water Users Association Inc. Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Grant Creek Water Users Association Inc. have a median household income of $65,054 and about 19,832 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 62% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Grant Creek Water Users Association Inc.'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.
Superfund Proximity Note: This service area ranks in the 60th percentile nationally for proximity to Superfund (NPL) sites. Groundwater sources near contaminated sites may face elevated risk from industrial chemicals.
Infrastructure Risk
Comparable Water Systems
Similar-sized systems in Montana
System Overview
Grant Creek Water Users Association Inc. (EPA ID: MT0003305) is a community water system in Montana that serves approximately 380 people from groundwater sources.
This system serves ZIP code 59802 in Missoula.
Violation History
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| Below the reporting limit | No | 2025-12-31 |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Ask your water utility whether running cold water for 2 minutes is enough to flush your plumbing before drinking.
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 MT or modeled from parcel and building-footprint data.
- 59802 - Missoula
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Grant Creek Water Users Association Inc. (MT0003305) on EPA.gov.
Frequently Asked Questions
Is Grant Creek Water Users Association Inc. water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Grant Creek Water Users Association Inc. 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 Grant Creek Water Users Association Inc. serve?
Grant Creek Water Users Association Inc. serves approximately 380 people across 1 ZIP code in Montana.
Where does Grant Creek Water Users Association Inc. get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Grant Creek Water Users Association Inc. Water Report, MT. https://zipcheckup.com/water-system/mt0003305/
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