Harford, 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 Harford in Maryland · Population: 262,509
TRI sites such as U.S. Army Aberdeen Proving Ground; The Gill Corporation-Maryland; Cytec Engineered Inc; SDWIS systems such as HARFORD COUNTY D.P.W.; CITY OF ABERDEEN; CHAPEL HILL - ABERDEEN PROVING GROUNDS; NPL sites such as Bush Valley Landfill anchor Harford, MD's EPA extract. Derived burden score 50/100 (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 Harford include CITY OF HAVRE DE GRACE; R & R ESTATES; QUEENS CASTLE MOBILE HOME PARK, while U.S. Army Aberdeen Proving Ground leads reported TRI pounds among local Form R filers. AQS median AQI 42 / peak 154 in 2024.
Burden score 50/100 (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 Harford -- 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.
Release-over-release change
What changed for Harford, MD: EPA TRI 2023 reporting year
Same facilities, both years
+31.5%
11 facilities that filed in 2022 and 2023
Whole inventory
+28.9%
49.8 thousand lb → 64.2 thousand lb, every facility that filed
Between the two reporting years, 2 facilities filed for the first time and 2 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Harford, MD's total reported releases rose from 48.8 thousand lb in 2022 to 64.2 thousand lb in 2023, based on EPA TRI filings.
- Harford, MD's off-site transfers fell from 1.9 thousand lb in 2022 to 127 lb in 2023, based on EPA TRI filings.
- Harford, MD's water releases rose from 97 lb in 2022 to 156 lb in 2023, based on EPA TRI filings.
- Harford, MD's land releases rose from 38.5 thousand lb in 2022 to 55.1 thousand lb in 2023, based on EPA TRI filings.
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 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 (17)
| System | System pop (SDWIS) | 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 COMPANY | 13,200 | 0 |
| 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 | 96 | 2 |
| 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 |
Superfund Sites (1)
| Site Name | Status | HRS Score |
|---|---|---|
| Bush Valley Landfill | NPL Site | 40.30 |
Cities in Harford (12)
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 environmental agencies cover Harford? ▼
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.