Saint Marys City, MD Water Safety: 63/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-04
Across Saint Marys City, EPA compliance data for MD sits at a moderate level — not alarming, but not uniformly clean across all service areas either.
How Saint Marys City Compares
Data: EPA SDWIS Last verified: 2026-06-04
Key Facts for Saint Marys City Residents
- Estimated remediation: $1,600 per household.
- CDC health risk index: 12.51 — above typical levels.
Saint Marys City's Water Providers
The structure of water supply in Saint Marys City, MD is straightforward: one utility provides the bulk of residential service among 1 tracked system, concentrating rate-setting and infrastructure decisions under a single organization.
Overview
We track water quality and home safety data for 1 ZIP code in Saint Marys City, Maryland, covering 1 community water system serving approximately 949 people.
No EPA violations recorded across any ZIP codes in Saint Marys City — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Saint Marys City: C (63/100)
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 Marys City water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Saint Marys City
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 2 (Moderate 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 |
|---|---|---|---|
| 20686 | C | LORD CALVERT TRAILER PARK | 892 |
All ZIP Codes in Saint Marys City
- 20686 [C]
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.
Saint Marys City Community Health Snapshot
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
Saint Marys City: Flood History & Water Damage Risk
Flood risk in Saint Marys City occupies the middle ground: 2 NFIP claims and 100% of local ZIP codes within FEMA flood zones. At that level, the risk pathways connecting flooding to water quality — treatment system stress, well infiltration, distribution backflow — become relevant considerations during significant flood events, even if day-to-day water quality is unaffected by flood history.
Saint Marys City has a moderate flood history with 2 FEMA claims averaging $1,048 per payout. 100% of ZIP codes fall within FEMA flood zones. Flood events can contaminate drinking water and overwhelm treatment systems.
How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. Flood damage can add significantly to the estimated <strong>$1,600</strong> remediation cost per household.
Residents in flood-prone areas should consider flood insurance even outside FEMA zones — over 25% of flood claims come from low-to-moderate risk areas. After any flood event, test your water before drinking.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
What You Can Do in Saint Marys City
- 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.
Deep Dive Reports
Detailed analysis for Saint Marys City, MD