Harford, 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 Harford in Maryland · Population: 262,509
Harford, MD is tracked across three EPA datasets covering 17 Toxics Release Inventory (TRI) facilities, 16 Safe Drinking Water Act systems, and 0 Superfund National Priorities List sites. Together these generate an environmental burden score of 45/100 (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 517.1K lbs of reported toxic releases under EPCRA Section 313, while 8 water systems carry an active health-based violation in the SDWIS record. EPA Air Quality System monitors logged a median AQI of 42 and a peak AQI of 154 in 2024, with 72% 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 | 262 (72%) | 95 | 5 | 154 |
| 2023 | 238 (66%) | 111 | 7 | 200 |
| 2022 | 262 (73%) | 98 | 0 | 97 |
| 2021 | 219 (61%) | 129 | 9 | 122 |
| 2020 | 286 (80%) | 70 | 1 | 119 |
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 (16)
| System | Population | Violations |
|---|---|---|
| HARFORD COUNTY D.P.W. | 104,567 | 0 |
| CITY OF ABERDEEN | 18,006 | 0 |
| CHAPEL HILL - ABERDEEN PROVING GROUNDS | 15,000 | 0 |
| CITY OF HAVRE DE GRACE | 14,000 | 10 |
| MARYLAND AMERICAN WATER--SEVERN SYSTEM | 5,447 | 0 |
| SWAN HARBOUR DELL MOBILE HOME PARK | 500 | 0 |
| MISTY MEADOWS 1 / HIGHLAND HILLS M.H.P. | 460 | 0 |
| R & R ESTATES | 85 | 1 |
| TIMBER GROVE MHP | 76 | 0 |
| MISTY MEADOWS 2 MOBILE HOME PARK | 70 | 0 |
| QUEENS CASTLE MOBILE HOME PARK | 60 | 1 |
| FOUNTAIN GREEN MOBILE HOME PARK | 55 | 1 |
| HART HERITAGE | 37 | 1 |
| HYDETOWN PARK EAST | 29 | 5 |
| CLEAR VIEW MOBILE HOME PARK LLC | 28 | 1 |
| HYDETOWN PARK WEST | 26 | 1 |
TRI Facilities (17)
| # | Facility | Total Releases |
|---|---|---|
| 1 | U.S. Army Aberdeen Proving Ground | 288.9K lbs |
| 2 | The Gill Corporation-Maryland | 134.0K lbs |
| 3 | Cytec Engineered Inc | 50.5K lbs |
| 4 | Tanner Industries Inc | 14.1K lbs |
| 5 | Independent Can Co | 14.0K lbs |
| 6 | Perryman Generating Station | 7.6K lbs |
| 7 | Oldcastle Precast Inc | 3.7K lbs |
| 8 | Citrus & Allied Essences Ltd. | 2.5K lbs |
| 9 | S&g Concrete Edgewood | 1.4K lbs |
| 10 | Proform Finishing Products - Belcamp | 371 lbs |
| 11 | Onguard Industries | 40 lbs |
| 12 | Elite Comfort Solutions - Havre de Grace | 1 lbs |
| 13 | Maryland Paving Inc | 0 lbs |
| 14 | Lafarge Joppa Concrete Batch Plant | 0 lbs |
| 15 | Harford Systems LLC | 0 lbs |
| 16 | Tilley Distribution | 0 lbs |
| 17 | Noble Oil Services Inc. | 0 lbs |
Cities in Harford (7)
Frequently Asked Questions
What is the environmental risk level in Harford, Maryland? ▼
Are there Superfund sites in Harford? ▼
How many toxic release facilities are in Harford? ▼
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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.