waterbycounty
Federal water data

County water report

Falls Church city Water Report

Drinking-water compliance, watershed health, monitoring records, and river conditions for Falls Church city, Virginia.

Water grade

N/A

Water score

N/A

State rank

N/A

Health violations

N/A

EPA SDWIS, 5-year lookback

Watershed impaired

50.0%

4 water bodies assessed

Monitoring sites

N/A

EPA Water Quality Portal

Live streamflow

11%

FOUR MILE RUN AT HWY 29 AT FALLS CHURCH, VA

Water at a glance

Key Water Indicators for Falls Church city

EPA SDWIS

Safety Grade

N/A

Insufficient data

EPA SDWIS

Active Violations

N/A

5-year health-based lookback

EPA ATTAINS

Watershed Health

50% impaired

4 bodies assessed

USGS NWIS

Streamflow Snapshot

11% of mean

FOUR MILE RUN AT HWY 29 AT FALLS CHURCH, VA

EPA WQP

Monitoring Sites

N/A

Rolling 5-year window

Source: EPA SDWIS · Safe Drinking Water Information System

Drinking Water Compliance

Editorial analysis

Understanding Falls Church city’s Water

Drinking Water Quality Overview

EPA SDWIS

Falls Church city has limited drinking water data on file. Violation data are unavailable for this county.

Watershed Conditions

EPA ATTAINS

Under the Clean Water Act §303(d), EPA ATTAINS tracks whether waterways meet quality standards for drinking, recreation, and aquatic life (reporting cycle: 2022). A substantial 50.0% of assessed waterways are impaired (2 of 4 water bodies) across Falls Church city's watersheds. The leading impairment causes are benthic macroinvertebrates bioassessments and escherichia coli (e. coli). Impairment does not mean tap water is unsafe — it measures ambient waterway conditions upstream of treatment, not finished drinking water.

River & Streamflow Status

USGS NWIS

USGS NWIS gauge data (as of 2026-05-14T15:00:00.000-04:00) puts FOUR MILE RUN at 0.1 cfs — well below its long-term average at 11% of mean — low-flow conditions worth noting for water-dependent ecosystems. Streamflow is a leading indicator of drought stress, sediment load, and dilution capacity: low flows concentrate pollutants and warm water temperatures, stressing aquatic life and, in surface-water-dependent systems, the source water quality for treatment plants.

Editorial advisory

What the data suggests for Falls Church city

Water Verdict

Falls Church city does not have sufficient EPA SDWIS water quality data to determine an overall assessment. Residents should contact their local water utility for the most recent Consumer Confidence Report.

Violation Context

Health-based violation data is not available for Falls Church city. EPA health violations occur when water systems exceed allowable contaminant levels or fail to meet treatment requirements. Residents should request the latest Consumer Confidence Report from their water provider.

Consumer Guidance

Drinking-water compliance data is not yet available for Falls Church city in the EPA SDWIS system, which is common for rural areas and census areas served by private wells or small tribal systems. Residents should contact their local utility or state drinking-water agency for the most current Consumer Confidence Report. Using an NSF-certified filter (look for certifications against ANSI/NSF 53 or 58) can provide additional safety margin for any unconfirmed contaminants. Benthic Macroinvertebrates Bioassessments is the leading impairment cause in Falls Church city's watershed. A pipeline streamflow snapshot from the FOUR MILE RUN gauge is also available on this page.

Regional Context

State-level water quality comparison data is not available for Falls Church city. When data is available, this section will show how the county's water quality compares to other counties in Virginia.

Advisory text summarizes county-level public records and is not a replacement for your utility's current Consumer Confidence Report or direct local notices.

Contaminants & Resources

Key issues flagged in Falls Church city's water environment

Watershed Impairment Causes (EPA ATTAINS)

  • 1

    Benthic Macroinvertebrates Bioassessments

    Impairment cause per EPA Clean Water Act §303(d) assessment

  • 2

    E. coli (bacteria)

    Impairment cause per EPA Clean Water Act §303(d) assessment

Source: EPA ATTAINS · Reporting cycle 2022

Official EPA Resources for Falls Church city

EPA How's My Waterway

Interactive watershed health data for Falls Church city

EPA ECHO: Drinking Water Systems

Search water utilities and violation records for Falls Church city

Consumer Confidence Reports (VA)

Annual water quality reports from utilities in Virginia

Clean Water Act §303(d)

Watershed Health

Impaired Water Bodies

50.0%

2 of 4 assessed

Moderate concern

Top Impairment Causes

  • 1

    BENTHIC MACROINVERTEBRATES BIOASSESSMENTS

  • 2

    ESCHERICHIA COLI (E. COLI)

Source: EPA ATTAINS · Reporting cycle 2022

Impairment is determined under the Clean Water Act §303(d): a water body is impaired when it fails to meet state-defined quality standards for designated uses (drinking, recreation, aquatic life). Assessment coverage varies by state; counties without assessed water bodies are not shown.

Live USGS Streamgage

River & Stream Conditions

Current Discharge

0.10cfs

May 14, 7:00 PM UTC

vs Long-Term Average

11%

Well below typical

Primary Streamgage

FOUR MILE RUN AT HWY 29 AT FALLS CHURCH, VA

USGS site
01652090
Drainage area
0.932 sq mi
Long-term mean
0.91 cfs

One representative streamgage (the one with the largest drainage area in the county). Many counties have multiple gauges; this view summarizes the primary one. The long-term mean is the full-record annual average; the percent-of-typical value compares the latest reading against that average.

Free tool

Estimate Your Water Costs

Water Cost Estimate

3

3 people  ·  ~225 gal/day

Annual Total

$558

Monthly

$47

Water Bill

$558/yr

Filter Cost

$0/yr

Safety Grade for Falls Church city:F — Failing

High violation count or severe watershed conditions.

Estimates use the national average residential water rate ($0.0068/gal, EPA/AWWA 2023) and EPA WaterSense per-person consumption baseline (75 gal/person/day). Actual bills vary by utility, usage tier, and local infrastructure fees. For informational purposes only.

Try the full calculator →

Falls Church city has good water quality

Learn about water restrictions and conservation in your area.

Water Restrictions →

Frequently Asked Questions

What is the water quality in Falls Church city, Virginia?
Falls Church city, Virginia has a drinking-water quality grade of N/A with a score of N/A/100, based on EPA SDWIS compliance data. Compliance data is currently unavailable. Watershed health, monitoring records, and streamflow snapshots are reported separately on this page.
Are there any water violations in Falls Church city?
Violation data for Falls Church city is not currently available. Health-based violations indicate instances where contaminant levels exceeded EPA Maximum Contaminant Levels (MCLs).
How healthy are the watersheds in Falls Church city?
EPA ATTAINS assessments under Clean Water Act §303(d) indicate 50.0% of Falls Church city's 4 assessed water bodies are classified as impaired (2 impaired). The top reported causes are BENTHIC MACROINVERTEBRATES BIOASSESSMENTS, ESCHERICHIA COLI (E. COLI). Impairment means the water body fails to meet state quality standards for at least one designated use — drinking water source, recreation, aquatic life, or fish consumption. Note: watershed impairment doesn't always translate to tap-water issues; treatment plants can remove most regulated contaminants.
What's happening with rivers in Falls Church city right now?
Falls Church city's primary USGS streamgage on the FOUR MILE RUN has a pipeline snapshot of 0.1 cubic feet per second — 11% of the long-term mean of 0.91 cfs. This is well below typical — often a signal of drought stress on source water. For the latest gauge feed, visit waterdata.usgs.gov.
How does Falls Church city water compare to the Virginia average?
Falls Church city's SDWIS water quality score of N/A/100 is not available for comparison. The average water quality grade across Virginia is D, based on data from 95 counties with available SDWIS data.
Is tap water safe to drink in Falls Church city?
Based on EPA SDWIS data, Falls Church city has a water quality grade of N/A (N/A/100). Insufficient data is available to fully assess compliance. The grade speaks to the public water system, not the watershed — for watershed-level concerns, see the Watershed Health zone. For the most up-to-date information, contact your local water utility or review your Consumer Confidence Report (CCR).
Does Falls Church city have clean drinking water?
Falls Church city has no reported health-based drinking water violations according to EPA records. With a water quality score of N/A/100 and grade N/A, the county's drinking water has had some compliance issues but continues to be monitored. Note: drinking-water compliance speaks to the public water system, not necessarily to the watershed itself — check the Watershed Health zone for ATTAINS §303(d) data.
How is water quality measured?
WaterByCounty layers four federal datasets per county. The A–F drinking-water grade comes from EPA SDWIS (Safe Drinking Water Act compliance, 5-year violation lookback). The Watershed Health zone surfaces EPA ATTAINS §303(d) impairment data. The Monitoring zone summarizes EPA Water Quality Portal records. The Streamflow zone reports the latest USGS NWIS reading from the county's primary streamgage. Each is reported separately so you can see where the water is actually weakest.

Data Sources

Drinking-water compliance data from the EPA Safe Drinking Water Information System (SDWIS) via the ECHO enforcement database. Scores reflect compliance history and health-based violation counts.

Watershed health and impaired-waterway data from the EPA ATTAINS Clean Water Act §303(d) assessments, state-reported and EPA-finalized.

Live streamflow from the USGS National Water Information System (NWIS), continuous discharge measurements from the largest-drainage gauge in each county, compared against the full-record long-term annual mean.

Disclaimer: This data is informational only. It is not health, legal, or professional advice. For concerns about your specific water supply, contact your local water utility.

By Evan Brooks, Data EditorUpdated Reviewed by Evan Brooks, Data Editor

Explore more data for Falls Church city

Property TaxCost of LivingCrime RateIncomeHealthSchoolsDisaster RiskWeatherCounty Score