Annandale, VA Water Safety: 65/100 (2026)
1 ZIP code · 2 water systems · Updated 2026-06-03
Annandale's water quality grade in VA reflects a middle-ground assessment — service areas range from fully compliant to violation-flagged in current EPA records.
How Annandale Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Annandale Water
- Homes built before 1986: 88% — older plumbing may contain lead solder.
- Estimated remediation: $1,800 per household.
- CDC health risk index: 9.75.
Who Supplies Your Water in Annandale
Water delivery in Annandale, VA is handled by 2 utilities rather than a single system — drawn from 2 providers in federal records, each filing its own compliance reports and setting its own rates.
Overview
We track water quality and home safety data for 1 ZIP code in Annandale, Virginia (population ~58,154), covering 2 community water systems serving approximately 1,124,253 people region-wide.
No EPA violations recorded across any ZIP codes in Annandale — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Annandale: C (65/100)
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
Annandale water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Annandale
- 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 |
|---|---|---|---|
| 22003 | C | FAIRFAX COUNTY WATER AUTHORITY | 1,121,613 |
All ZIP Codes in Annandale
- 22003 [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 Annandale
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 Annandale
With 88% 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
Heavily weighted toward older construction, Annandale's housing stock carries a median build year of 1962. That profile puts a majority of homes in the era when lead-soldered copper plumbing was standard practice.
Over half of homes in Annandale 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.
Cost Context: What Remediation Means for Annandale Homeowners
The household financial picture for Annandale homeowners is proportionally favorable — addressing documented issues claims a small slice of equity, and the cost-to-value ratio puts this area well within the manageable tier.
Remediation costs in Annandale are relatively low compared to home values. The $1,200–$2,600 estimated range is a small fraction of median property value. Home values are 121% above the Virginia average.
Lead Exposure Risk for Children in Annandale
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 88% 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 Annandale address.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Flood & Climate Risk in Annandale
Within the NFIP's national dataset, Annandale falls in moderate-exposure territory — 47 documented incidents spanning multiple decades, with 100% of local ZIP codes sitting inside FEMA flood boundaries. That combination warrants inclusion in any thorough local water quality review.
Annandale has a moderate flood history with 47 FEMA claims averaging $10,153 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>$1,800</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 Annandale
- 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 88% of homes built before 1986, lead solder is a real possibility.
Deep Dive Reports
Detailed analysis for Annandale, VA