Annapolis Junction, MD Water Safety: 63/100 (2026)
1 ZIP code · 3 water systems · Updated 2026-06-03
For most households in Annapolis Junction, MD tap water is adequate — the middle-tier grade reflects gaps in specific service areas.
How Annapolis Junction Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Annapolis Junction Water
- Estimated remediation: $1,600 per household.
- CDC health risk index: 11.75.
Who Supplies Your Water in Annapolis Junction
3 water systems are tracked federally in Annapolis Junction, MD. The top 3 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 Annapolis Junction, Maryland (population ~749), covering 3 community water systems serving approximately 577,664 people region-wide.
No EPA violations recorded across any ZIP codes in Annapolis Junction — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Annapolis Junction: 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
Annapolis Junction water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Annapolis Junction
- 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 |
|---|---|---|---|
| 20701 | C | Glen Burnie-broadneck | 290,606 |
All ZIP Codes in Annapolis Junction
- 20701 [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 Annapolis Junction
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 Annapolis Junction
Housing age data helps assess potential lead pipe and infrastructure risks. Newer housing stock generally means lower plumbing-related contamination risk.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Why does housing age matter for water safety? Homes built before 1986 may have lead-soldered copper plumbing joints — a practice banned that year. Annapolis Junction's median build year of 2015 places much of the city's housing in the post-ban era, reducing that specific risk pathway for most residents.
Most homes in Annapolis Junction were built after 1986, reducing the risk of lead contamination from plumbing. Older homes should still be tested.
Source: U.S. Census Bureau ACS B25034.
Flood & Climate Risk in Annapolis Junction
Flood activity in Annapolis Junction is neither negligible nor at the level of the highest-exposure areas in the NFIP dataset. The 3-claim record and 100% flood zone coverage suggest a community that has experienced recurrent events but has not faced the kind of sustained, severe exposure where water-supply contamination becomes a primary public health concern. It sits in a middle range where flood history merits inclusion in any complete local water quality picture.
Annapolis Junction has a moderate flood history with 3 FEMA claims averaging $268 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 Annapolis Junction
- 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 Annapolis Junction, MD