Stillwater County, Montana
5 ZIP codes · Avg score 59/100 · Grade C · Updated 2026-06-04
Water monitoring across Stillwater County's 5 ZIP codes paints a mid-range picture — solid compliance in some zones, documented concerns in others; most violations on record are concentrated in specific prior years rather than spread evenly across the full compliance history, and the overall county grade has held steady in the middle tier without major shifts in either direction.
How Stillwater County Compares
How Stillwater County Compares
Stillwater County scores 4 points above the Montana state average (55/100) and 9 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-04
ZIP Code Risk Map
Water Quality Map: Stillwater County, Montana
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 12.8 (asthma 10.8%, diabetes 10.8%)
Estimated additional annual cost per homeowner: $1,090, driven primarily by flood
Infrastructure: 0.352% avg pipe failure probability
56% of homes built before 1978 (lead paint era)
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $1,090
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
3,521 housing units in Stillwater County
Source: U.S. Census Bureau ACS B25034 (Year Structure Built).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Stillwater County
Remediation costs are relatively manageable for most homeowners in Stillwater County, representing a small fraction of property value.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Health Outcomes vs National Average
CDC PLACES data for Stillwater County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 5 systems in Stillwater County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Country Haven Estates Whispering Pines | 100 | 10 |
| 2 | Columbus Town of | 1,900 | 10 |
| 3 | Eagle Mountain Rural Public Water System | 50 | 10 |
| 4 | Hilltop Water | 50 | 10 |
| 5 | Sherwood Water Station | 25 | 10 |
7 total water systems serve Stillwater County.
All ZIP Codes in Stillwater County
5 ZIP codes tracked in Stillwater County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 59067 | Rapelje | 66 | C | 1 | $339K |
| 2 | 59001 | Absarokee | 64 | C | 2 | $312K |
| 3 | 59019 | Columbus | 59 | C | 10 | $353K |
| 4 | 59028 | Fishtail | 53 | D | 0 | $519K |
| 5 | 59061 | Nye | 53 | D | 0 | $329K |
Recommended Buyer Guides for Stillwater County
Retailer arrangements don't shape what appears here — the selection logic is independent, filtered against EPA detections and the federal hazard data on file for this county.
- Best Lead Paint Test Kits — 56% of homes built before 1978
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
- Best Sump Pumps — Flood is the top compound risk factor
- Best Mold Test Kits — Flood-driven moisture and mold risk
Deep Dive Reports
Detailed analysis for Stillwater County, Montana
Overview
Stillwater County in Montana covers 5 ZIP codes with an average Home Safety Score of C (59/100).
3 of 5 ZIP codes have recorded EPA violations. All violations are monitoring/reporting type.
← Back to Montana water quality report
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Updated daily.