Marydel, MD Water Safety: 66/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-03
Although much of Marydel meets baseline drinking water standards, some MD-tracked service areas show violations that merit a closer look — particularly for older housing stock.
How Marydel Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Marydel Water
- Homes built before 1986: 65% — older plumbing may contain lead solder.
- CDC health risk index: 15.24 — above typical levels.
Who Supplies Your Water in Marydel
Federal records track 1 water system in Marydel, MD, and a single provider handles the dominant share of residential connections while carrying primary responsibility for EPA compliance.
Overview
We track water quality and home safety data for 1 ZIP code in Marydel, Maryland, covering 1 community water system serving approximately 1,938 people.
No EPA violations recorded across any ZIP codes in Marydel — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Marydel: C (66/100)
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
Marydel water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Marydel
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 3 (Low Risk)
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 21649 | C | TOWN OF SUDLERSVILLE | 497 |
All ZIP Codes in Marydel
- 21649 [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.
Health Outcomes in Marydel
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
Housing & Infrastructure in Marydel
With 65% of homes built before 1986, lead solder in plumbing is a potential concern. The EPA banned lead solder in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Pre-1986 plumbing is not a rare legacy case in Marydel — it's the dominant profile. The median build year of 1973 indicates a housing stock where lead-soldered copper joints are a common structural feature of residences across the city.
Over half of homes in Marydel were built before 1986, when lead solder was banned. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.
Source: U.S. Census Bureau ACS B25034.
Lead Exposure Risk for Children in Marydel
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
Older interior plumbing shapes the local picture: 65% of Marydel homes predate the federal solder ban, and aggregate sampling either approaches or crosses the action benchmark. That mix makes a single-home draw a standard pre-purchase or pre-occupancy step.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
What You Can Do in Marydel
- 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. With 65% of homes built before 1986, lead solder is a real possibility.
Deep Dive Reports
Detailed analysis for Marydel, MD