PlainEnviro

Montgomery, MD

Moderate Risk (30/100)

A PlainEnviro-computed score from reported facility/violation counts, not an official EPA rating, health forecast, or population-adjusted rate. See methodology.

Environmental data for Montgomery in Maryland · Population: 1,057,586

Montgomery, MD is tracked across three EPA datasets covering 10 Toxics Release Inventory (TRI) facilities, 9 Safe Drinking Water Act systems, and 0 Superfund National Priorities List sites. Together these generate an environmental burden score of 30/100 (Moderate Risk), calibrated against national distributions for facility density, chemical release volume, Superfund concentration, and water-system health violations.

Industrial disclosures inside the county total 17.3K lbs of reported toxic releases under EPCRA Section 313, while 4 water systems carry an active health-based violation in the SDWIS record. EPA Air Quality System monitors logged a median AQI of 40 and a peak AQI of 100 in 2024, with 76% of observed days rated "Good" (0–50).

All figures below draw directly from federal EPA records, TRI self-reported emissions, SDWIS compliance history, NPL Hazard Ranking System scores, and AQS daily AQI summaries, and are not adjusted, weighted, or forecast. A past violation or elevated score does not itself indicate current unsafe conditions; it documents the regulatory and disclosure history publicly filed with the U.S. Environmental Protection Agency through the most recent reporting cycle.

Population
1,057,586
TRI Facilities
10
Water Systems
9
Superfund Sites
0
Total Releases
17.3K lbs

Air Quality History (2020–2024)

EPA Air Quality Index (AQI) data showing how many days per year fall into each air quality category.

Year Good Moderate Unhealthy (SG) Max AQI
2024 271 (76%) 85 0 100
2023 291 (82%) 61 2 165
2022 241 (68%) 113 1 119
2021 251 (70%) 107 3 119
2020 310 (87%) 45 0 77
2024 Good Air Quality: 76% of days
Median AQI: 40

Source: EPA Air Quality System (AQS) Annual AQI by County EPA Air Quality System (AQS) Annual AQI by County AQI categories: Good (0-50), Moderate (51-100), Unhealthy for Sensitive Groups (101-150), Unhealthy (151-200), Very Unhealthy (201-300), Hazardous (301+)

For real-time air quality readings and pollutant breakdowns in Maryland, see the EPA's AirNow.gov.

Water Systems (9)

System Population Violations
TOWN OF POOLESVILLE 6,005 0
FAIRLAND CROSSING APARTMENTS 1,248 0
FAIRGROVE MHP 244 2
WOODBINE VILLAGE MOBILE HOME PARK 150 3
ALTAMAHA MOBILE HOME VILLAGE 143 0
GRANITE MOBILE HOME PARK 96 0
SPRING VIEW MOBILE HOME PARK 70 0
COUNTRY VILLAGE MOBILE HOME PARK 38 3
CROOKED RIVER APARTMENTS 32 1

TRI Facilities (10)

# Facility Total Releases
1 Genon Mid Atlantic LLC Dickerson Generating Station 15.7K lbs
2 Rockville Ready Mix Concrete 958 lbs
3 U.S. Public Health Service National Institutes of Health 638 lbs
4 Wabtec Railway Electronics 41 lbs
5 Lafarge Mid Atlantic LLC -Rockville East Concrete 1 lbs
6 Schuster Concrete Ready Mix Llc-Southlawn Ln 0 lbs
7 Neutron Products Inc. 0 lbs
8 National Institute of Standards & Technology 0 lbs
9 McCormick Paint Works Co 0 lbs
10 Griffith Energy Services - Damascus Fuels Plant 0 lbs

Cities in Montgomery (6)

Dickerson
Pop: -
2 facilities · 0 water
Rockville
Pop: -
4 facilities · 1 water
Germantown
Pop: -
1 facilities · 0 water
Bethesda
Pop: -
1 facilities · 3 water
Gaithersburg
Pop: -
1 facilities · 8 water
Damascus
Pop: -
1 facilities · 0 water

Frequently Asked Questions

What is the environmental risk level in Montgomery, Maryland? ▼
Montgomery, MD has an environmental risk score of 30/100 (Moderate Risk), based on 10 TRI facilities, 0 Superfund sites, and 9 water systems on record. 4 water systems have health-based violations. Source: EPA TRI, SDWIS, and Superfund NPL.
Are there Superfund sites in Montgomery? ▼
No Superfund National Priorities List (NPL) sites are currently registered in Montgomery, MD in the EPA database.
How many toxic release facilities are in Montgomery? ▼
Montgomery, MD has 10 TRI-reporting facilities on record with the EPA Toxic Release Inventory, with a combined total of 17.3K lbs in reported toxic releases. TRI facilities self-report annual chemical release data to the EPA.
What is the air quality in Montgomery? ▼
In 2024, Montgomery, MD recorded a median AQI of 40 and a peak AQI of 100. 76% of monitored days had "Good" air quality (AQI 0–50). Source: EPA Air Quality System (AQS) Annual AQI by County.
Is the drinking water safe in Montgomery? ▼
Montgomery, MD has 9 EPA-regulated water systems. 4 systems have reported health-based violations (MCL exceedances). A past violation does not necessarily mean water is currently unsafe. For current water quality, contact your local water utility. Source: EPA SDWIS.
What environmental agencies cover Montgomery? ▼
Environmental compliance in Montgomery, Maryland is overseen by the U.S. Environmental Protection Agency (EPA) at the federal level and the Maryland state environmental agency. Facilities report to the EPA Toxic Release Inventory, water systems are regulated under the Safe Drinking Water Act, and contaminated sites are managed under the Superfund program. Contact your state environmental agency for local concerns.

What does this county environmental profile show?

This county environmental profile rolls up EPA Toxics Release Inventory facility reports, Safe Drinking Water Information System public-water-system filings, and Superfund National Priorities List sites for the county boundary defined by the U.S. Census Bureau. Facility counts reflect facilities with a reporting address inside the county, not where downstream environmental effects may be observed. Population figures are from the most recent Census ACS 5-year estimate. The county detail page is updated whenever the upstream EPA programs publish revised data; see the methodology page for the documented ingest cadence and the editorial choices governing how aggregations are computed.

Related Guides

Understanding EPA Data
How EPA collects and publishes environmental data
Environmental Justice
Who lives near polluters and environmental hazards
How to Check Environmental Quality
Step-by-step guide to checking your local environment

Read our methodology - how this data is sourced, computed, and verified.

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Data sourced from U.S. EPA environmental datasets. See our methodology for details. Retrieved and formatted by PlainEnviro Editorial