Crofton, MD Water Safety: 78/100 (2026)
1 ZIP code · 2 water systems · Updated 2026-06-03
Although water quality varies across any metro, Crofton's systems collectively post above-average compliance scores for MD — and documented violations are few.
How Crofton Compares
Data: EPA SDWIS Last verified: 2026-06-03
Key Facts for Crofton Residents
- Average lead level: 0.002 mg/L.
- Homes built before 1986: 53% — older plumbing may contain lead solder.
- Estimated remediation: $2,100 per household.
- CDC health risk index: 11.75.
Crofton's Water Providers
2 water systems are tracked federally in Crofton, MD. The top 2 providers collectively serve most residential addresses, but because they operate independently, infrastructure maintenance standards and compliance histories differ from one service zone to another.
Overview
We track water quality and home safety data for 1 ZIP code in Crofton, Maryland (population ~25,724), covering 2 community water systems serving approximately 63,306 people region-wide.
No EPA violations recorded across any ZIP codes in Crofton — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Crofton: B (78/100)
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
Crofton water systems draw from: Groundwater.
Lead & Copper
- Average lead level (90th percentile): 0.0020 mg/L (EPA action level: 0.015 mg/L)
- 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 |
|---|---|---|---|
| 21114 | B | Crofton-odenton | 62,986 |
All ZIP Codes in Crofton
- 21114 [B]
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.
Crofton 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
Crofton Infrastructure Age
With 53% 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
Reading the housing age data for Crofton — median build year 1986 — the overriding implication is that the plumbing materials inside a typical home here reflect pre-1986 construction standards. In practical terms, that means lead-soldered copper joints are common across much of the housing stock. Where those materials are present, water can leach lead as it moves through joints — a pathway that corrosion control treatment under federal rules is designed to reduce, though it cannot eliminate lead risk where the plumbing materials themselves contain lead.
Over half of homes in Crofton 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.
How Remediation Costs Compare in Crofton
Low proportionality — that's the Crofton picture when remediation costs are placed against typical home equity.
Remediation costs in Crofton are relatively low compared to home values. The $1,100–$3,400 estimated range is a small fraction of median property value. Home values are 12% above the Maryland average.
Crofton: Lead Risk & Vulnerable Populations
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.
53% of Crofton housing dates to the pre-rule era, alongside aggregate readings hovering at the federal action mark — household-level confirmation through a draw-test kit fits the local picture.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Crofton: Flood History & Water Damage Risk
FEMA data shows 100% of Crofton's ZIP codes mapped into designated flood zones, paired with an NFIP record of 14 claims. That footprint places local flood exposure in the range where it warrants attention without rising to high-severity planning territory.
Crofton has a moderate flood history with 14 FEMA claims averaging $1,379 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>$2,100</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.
Deep Dive Reports
Detailed analysis for Crofton, MD