Sweet Grass County, Montana
6 ZIP codes · Avg score 70/100 · Grade B · Updated 2026-06-04
Across Sweet Grass County's 6 ZIP codes, EPA compliance data shows above-average performance — violation rates are minimal, none of the county's systems have triggered health-based MCL exceedances in recent cycles, and the county's scores have stayed above the national baseline across every recent reporting period.
How Sweet Grass County Compares
How Sweet Grass County Compares
Sweet Grass County scores 15 points above the Montana state average (55/100) and 2 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-04
ZIP Code Risk Map
Water Quality Map: Sweet Grass County, Montana
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 12.9 (asthma 10.7%, diabetes 10.8%)
Estimated additional annual cost per homeowner: $1,068, driven primarily by energy_code_gap
Infrastructure: 0.368% avg pipe failure probability, 33% of ZIPs at high risk
68.8% 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: $1,068
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
2,200 housing units in Sweet Grass 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 Sweet Grass County
Remediation costs are relatively manageable for most homeowners in Sweet Grass 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 Sweet Grass 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 Sweet Grass County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | City of Big Timber | 1,650 | 0 |
| 2 | Strobel Trailer Court | 60 | 0 |
| 3 | Cottonwood Estates | 50 | 0 |
| 4 | Mountain View Mb Hm Pk | 150 | 0 |
| 5 | Country Haven Estates Whispering Pines | 100 | 0 |
All ZIP Codes in Sweet Grass County
6 ZIP codes tracked in Sweet Grass County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 59011 | Big Timber | 83 | B | 0 | $286K |
| 2 | 59033 | Greycliff | 83 | B | 0 | — |
| 3 | 59055 | Melville | 83 | B | 0 | — |
| 4 | 59052 | Mc Leod | 63 | C | 0 | $1350K |
| 5 | 59069 | Reed Point | 55 | C | 0 | $392K |
| 6 | 59082 | Springdale | 53 | D | 0 | — |
Recommended Buyer Guides for Sweet Grass County
Designed to find the guide that fits the county, not the other way around — the system reads EPA detections, FEMA hazard layers, and CDC lead-exposure markers, then outputs the categories that resolve those specific risks for households here, with NSF-certified products surfaced when the matching contaminant appears in the local monitoring data.
- Best Lead Paint Test Kits — 68.8% of homes built before 1978
Deep Dive Reports
Detailed analysis for Sweet Grass County, Montana
Overview
Sweet Grass County in Montana covers 6 ZIP codes with an average Home Safety Score of B (70/100).
No EPA violations recorded across any tracked ZIP codes in Sweet Grass County.
← 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.