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Federal water data

County water report

Manassas city Water Report

Drinking-water compliance, watershed health, monitoring records, and river conditions for Manassas 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

10.0%

10 water bodies assessed

Monitoring sites

N/A

EPA Water Quality Portal

Live streamflow

No gauge

Primary USGS station not mapped

Water at a glance

Key Water Indicators for Manassas city

EPA SDWIS

Safety Grade

N/A

Insufficient data

EPA SDWIS

Active Violations

N/A

5-year health-based lookback

EPA ATTAINS

Watershed Health

10% impaired

10 bodies assessed

USGS NWIS

Streamflow Snapshot

No gauge

Primary USGS gauge not mapped

EPA WQP

Monitoring Sites

N/A

Rolling 5-year window

Source: EPA SDWIS · Safe Drinking Water Information System

Drinking Water Compliance

Data center water stress

Manassas city has 7 facilities in the DCWSI dataset.

ByCounty's DCWSI ranks this county #N/A nationally by combining its water score with mapped data center density.

DCWSIThe Data Center Water Stress Index: 60% the county's water-system stress plus 40% how concentrated data centers already are, scored 0-100. Higher means data-center density and water pressure overlap more here.

N/A

0-100 index

Facility count

7

80.5 density percentile

Discharge estimate

Not reported

EPA CWA fields where available

Water vs median

N/A

Compared with US county median

Named operators

AWS

Mapped facilities

  • AMAZON DATA SERVICES, INC IAD-100/101/102/103

    MANASSAS · Amazon Data Services

    EPA ECHO

  • AMAZON DATA SERVICES, INC. IAD-14 IAD-52 IAD-59

    MANASSAS · Amazon Data Services

    EPA ECHO

  • Amazon Web Services

    Amazon Web Services

    OSM

  • Amazon Web Services

    Amazon Web Services

    OSM

  • Amazon Web Services

    Amazon Web Services

    OSM

  • GLEN GERY CORPORATION - CAPITOL PLANT

    MANASSAS

    EPA ECHO

1 more mapped facilities included in the county score.

See the Manassas city data-center reportReview methodology

Data Center Water Budget Calculator

Estimate daily water use for a hypothetical facility in Manassas city.

1 MW1,000 MW
40%100%
799K gallons/dayHigh Impact

Your facility would use 29176.6% of this county's industrial water baseline. Verify water rights and long-term drought projections before committing.

29176.6% of county industrial baseline

Based on USGS 2020 water-use data and EPA-standard cooling intensity constants. Not a substitute for site-specific water rights analysis.

Editorial analysis

Understanding Manassas city’s Water

Drinking Water Quality Overview

EPA SDWIS

Manassas 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 notable 10.0% of assessed waterways carry an impairment designation (1 of 10 water bodies) across Manassas city's watersheds. The leading impairment cause is escherichia coli (e. coli). Impairment does not mean tap water is unsafe — it measures ambient waterway conditions upstream of treatment, not finished drinking water.

Editorial advisory

What the data suggests for Manassas city

Water Verdict

Manassas 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 Manassas 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 Manassas 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. E. coli is the leading impairment cause in Manassas city's watershed.

Regional Context

State-level water quality comparison data is not available for Manassas 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 Manassas city's water environment

Watershed Impairment Causes (EPA ATTAINS)

  • 1

    E. coli (bacteria)

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

Source: EPA ATTAINS · Reporting cycle 2022

Official EPA Resources for Manassas city

EPA How's My Waterway

Interactive watershed health data for Manassas city

EPA ECHO: Drinking Water Systems

Search water utilities and violation records for Manassas city

Consumer Confidence Reports (VA)

Annual water quality reports from utilities in Virginia

Clean Water Act §303(d)

Watershed Health

Impaired Water Bodies

10.0%

1 of 10 assessed

Some impairment

Top Impairment Causes

  • 1

    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.

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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 Manassas 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.

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Manassas 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 Manassas city, Virginia?
Manassas 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 Manassas city?
Violation data for Manassas 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 Manassas city?
EPA ATTAINS assessments under Clean Water Act §303(d) indicate 10.0% of Manassas city's 10 assessed water bodies are classified as impaired (1 impaired). The top reported causes are 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.
How does Manassas city water compare to the Virginia average?
Manassas 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 Manassas city?
Based on EPA SDWIS data, Manassas 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 Manassas city have clean drinking water?
Manassas 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.

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

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