Crownsville, MD Water Safety: 55/100 (2026)
1 ZIP code · 4 water systems · Updated 2026-06-03
Across Crownsville, EPA compliance data for MD sits at a moderate level — not alarming, but not uniformly clean across all service areas either.
How Crownsville Compares
Data: EPA SDWIS Last verified: 2026-06-03
Crownsville Water: The Quick Version
- Homes built before 1986: 51% — older plumbing may contain lead solder.
- Estimated remediation: $1,600 per household.
- CDC health risk index: 11.75.
Water Systems Serving Crownsville
Crownsville, MD is covered by 3 major water utilities out of 4 federally tracked systems, each managing its own pipes, treatment processes, and EPA filings. What a household gets from the tap depends on which provider's system serves that address.
Overview
We track water quality and home safety data for 1 ZIP code in Crownsville, Maryland (population ~8,553), covering 4 community water systems serving approximately 123,406 people region-wide.
No EPA violations recorded across any ZIP codes in Crownsville — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Crownsville: C (55/100)
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
Crownsville water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Crownsville
- 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 |
|---|---|---|---|
| 21032 | C | Crofton-odenton | 62,986 |
All ZIP Codes in Crownsville
- 21032 [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.
CDC Health Data for Crownsville
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
How Old Is Crownsville's Housing Stock?
With 51% 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
When more than half a city's housing predates the 1986 federal ban on lead solder, plumbing-era lead risk becomes a citywide concern rather than an exception. Crownsville's median build year of 1984 places it squarely in that category.
Over half of homes in Crownsville 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.
Crownsville: Remediation Cost in Perspective
Because property values in Crownsville comfortably exceed estimated remediation costs, the equity impact here is proportionally small.
Remediation costs in Crownsville are relatively low compared to home values. The $800–$2,600 estimated range is a small fraction of median property value. Home values are 50% above the Maryland average.
Protecting Children from Lead in Crownsville
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.
When older housing represents 51% of the local inventory or aggregate readings approach the federal action level, an in-home check becomes the standard way to translate citywide averages into the specific reality of an individual Crownsville address.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Climate-Related Water Risk for Crownsville
The National Flood Insurance Program captures decades of claims at the local level, building a record of cumulative community flood exposure. For Crownsville, that record documents 32 claims and 100% of ZIP codes inside FEMA-designated flood zones. What makes those numbers relevant to water quality is the set of mechanisms flooding activates: heavy precipitation that floods treatment intake zones can introduce contaminants upstream of normal filtration; well casings in low-lying areas can be infiltrated by floodwaters carrying bacteria, sediment, and chemical residue; and distribution system pressure changes during flooding can create backflow conditions. These effects become more probable as flood frequency and magnitude increase — and the NFIP record indicates both are meaningful factors locally.
Crownsville has a moderate flood history with 32 FEMA claims averaging $17,105 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 Crownsville
- 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 51% of homes built before 1986, lead solder is a real possibility.
Deep Dive Reports
Detailed analysis for Crownsville, MD