Frederick, MD
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 Frederick in Maryland · Population: 280,341
Frederick, MD is tracked across three EPA datasets covering 9 Toxics Release Inventory (TRI) facilities, 32 Safe Drinking Water Act systems, and 0 Superfund National Priorities List sites. Together these generate an environmental burden score of 31/100 (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 905 lbs of reported toxic releases under EPCRA Section 313, while 13 water systems carry an active health-based violation in the SDWIS record. EPA Air Quality System monitors logged a median AQI of 43 and a peak AQI of 100 in 2024, with 79% 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.
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 | 192 (79%) | 51 | 0 | 100 |
| 2023 | 167 (72%) | 59 | 6 | 136 |
| 2022 | 212 (90%) | 23 | 1 | 115 |
| 2021 | 207 (85%) | 36 | 1 | 126 |
| 2020 | 217 (92%) | 20 | 0 | 90 |
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 (32)
| System | Population | Violations |
|---|---|---|
| NEW DESIGN - FREDERICK COUNTY | 74,911 | 0 |
| CITY OF FREDERICK | 54,000 | 1 |
| TOWN OF MOUNT AIRY | 9,890 | 0 |
| TOWN OF WALKERSVILLE | 8,440 | 0 |
| FORT DETRICK | 7,900 | 5 |
| CITY OF BRUNSWICK | 7,312 | 1 |
| TOWN OF THURMONT | 6,200 | 1 |
| TOWN OF MIDDLETOWN | 4,288 | 2 |
| FOUNTAINDALE SOUTH | 2,610 | 0 |
| TOWN OF EMMITSBURG | 2,400 | 2 |
| MOUNT SAINT MARYS UNIVERSITY | 1,900 | 0 |
| KNOLLS OF WINDSOR | 1,553 | 0 |
| TOWN OF MYERSVILLE | 1,516 | 0 |
| WATERSIDE | 1,509 | 0 |
| SAM HILL ESTATES | 1,036 | 0 |
| TOWN OF UNION BRIDGE | 997 | 1 |
| CAMBRIDGE FARMS | 953 | 0 |
| CLOVERHILL 3 - CONSECUTIVE TO MD0100015 | 888 | 3 |
| TOWN OF WOODSBORO | 846 | 0 |
| COPPERFIELD | 338 | 0 |
| PHEASANT RIDGE ESTATES | 300 | 1 |
| COUNTRY MEADOWS OF FREDERICK | 295 | 0 |
| WHITE ROCK | 256 | 0 |
| ROSEMONT DISTRIBUTION SYSTEM | 237 | 0 |
| BRADFORD ESTATES | 178 | 0 |
| LIBERTYTOWN EAST | 140 | 0 |
| TRANQUILITY AT FREDERICKTOWNE | 105 | 2 |
| PLEASANT VIEW NURSING HOME | 104 | 1 |
| LIBERTYTOWN APARTMENTS | 97 | 0 |
| POLINGS MOBILE HOME PARK | 80 | 0 |
| GILBERTS MOBILE HOME PARK | 75 | 4 |
| AMELANO MANOR | 36 | 1 |
TRI Facilities (9)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Lafarge Frederick Ready Mix | 571 lbs |
| 2 | US Army Fort Detrick | 334 lbs |
| 3 | Rinker Materials Hydro Conduit | 0 lbs |
| 4 | Schuster Concrete Ready Mix Llc-South St | 0 lbs |
| 5 | McCormick Paint Works Co | 0 lbs |
| 6 | American Computer Development Inc (dba Acdi) | 0 lbs |
| 7 | Griffith Energy Services Inc Frederick Bulk Plant | 0 lbs |
| 8 | Oldcastle Lawn & Garden | 0 lbs |
| 9 | Rinker Frederick Pipe | 0 lbs |
Cities in Frederick (2)
Frequently Asked Questions
What is the environmental risk level in Frederick, Maryland? ▼
Are there Superfund sites in Frederick? ▼
How many toxic release facilities are in Frederick? ▼
What is the air quality in Frederick? ▼
Is the drinking water safe in Frederick? ▼
What environmental agencies cover Frederick? ▼
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.
Read our methodology - how this data is sourced, computed, and verified.