Frederick, MD
Transparent derived index from EPA TRI / SDWIS / Superfund extracts: not an official EPA rating. Fixed caps: facilities ≤25 pts (50+ = max), log10 releases ≤25 pts, Superfund ≤25 pts (5/site), health-violation systems ≤15 pts (3/system), high-chemical facilities ≤10 pts. Bands: High ≥60, Moderate ≥30. See methodology.
Environmental data for Frederick in Maryland · Population: 280,341
TRI sites such as Lafarge Frederick Ready Mix; US Army Fort Detrick; Rinker Materials Hydro Conduit; SDWIS systems such as NEW DESIGN - FREDERICK COUNTY; CITY OF FREDERICK; TOWN OF MOUNT AIRY; NPL sites such as Fort Detrick Area B Ground Water anchor Frederick, MD's EPA extract. Derived burden score 37/100 (Moderate Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.
Health-flagged SDWIS rows in Frederick include CITY OF FREDERICK; FORT DETRICK; CITY OF BRUNSWICK, while Lafarge Frederick Ready Mix leads reported TRI pounds among local Form R filers. AQS median AQI 43 / peak 100 in 2024.
Burden score 37/100 (Moderate Risk) is the only weighted composite on this page. The tables below list every TRI facility, SDWIS system, and Superfund site EPA has on record for Frederick -- not just the names called out above -- reproducing the disclosure history as filed, not a current-safety verdict. Extract current as of 2026-08-25.
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 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 | System pop (SDWIS) | 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 |
| TOWN OF EMMITSBURG | 2,921 | 2 |
| FOUNTAINDALE SOUTH | 2,610 | 0 |
| 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 (11)
| # | 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 |
| 10 | Saputo Cheese USA Inc | 0 lbs |
| 11 | Glen-Gery Corp - Rocky Ridge Plant | 0 lbs |
Superfund Sites (1)
| Site Name | Status | HRS Score |
|---|---|---|
| Fort Detrick Area B Ground Water | NPL Site | 49.52 |
Cities in Frederick (11)
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.