Saint Mary, KY: High Radon Risk — 40/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-03
A meaningful share of water systems in Saint Mary have recorded health-based violations in recent KY monitoring periods — placing the city in the lower tier for tap water safety.
How Saint Mary Compares
Data: EPA SDWIS Last verified: 2026-06-03
Who Supplies Your Water in Saint Mary
For most households in Saint Mary, KY, tap water comes from one provider — the utility that controls the local distribution system out of 1 tracked in federal record.
Overview
We track water quality and home safety data for 1 ZIP code in Saint Mary, Kentucky (population ~468), covering 1 community water system serving approximately 16,311 people region-wide.
No EPA violations recorded across any ZIP codes in Saint Mary — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Saint Mary: D (40/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Saint Mary water systems draw from: Surface water.
Lead & Copper
- Lead data: not yet available for Saint Mary
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 1 (High Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 40063 | D | MARION COUNTY WATER DISTRICT | 16,311 |
All ZIP Codes in Saint Mary
- 40063 [D]
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.
What You Can Do in Saint Mary
- Test your water at home. City-level data shows averages — your tap may differ. NSF-certified test kits cost $20-40 and give results in days.
- Install a certified water filter. An NSF-certified pitcher or under-sink filter removes most common contaminants.
- Check your home's plumbing. Homes built before 1986 may have lead solder in pipes. A licensed plumber can assess your risk.
- Review your water system's CCR. Your utility publishes an annual Consumer Confidence Report with detailed test results. Request it or find it online.
Deep Dive Reports
Detailed analysis for Saint Mary, KY