TRI Facilities
210
High
MD · EPA TRI · SDWIS · Superfund
Maryland environmental disclosure record
According to EPA's 2023 Toxics Release Inventory, Safe Drinking Water Information System, and Superfund National Priorities List extracts, this is Maryland's full public registry profile, toxic releases, drinking-water systems, and Superfund sites in one place.
- TRI facilities
- 210
- Reported releases
- 25.5M lbs
- #44 of 56
- Water systems
- 481
- Superfund NPL sites
- 26
Maryland vs. every U.S. state
Cumulative TRI-reported release pounds, with this state marked in the national distribution
26M lbs 21st percentile higher than 21% of 56 states with TRI reporters
Each bar is a $1M-wide band; taller bars hold more states with TRI reporters. The dashed line and filled bar mark this facility. Hover, focus, or tap a bar for its full count, share, and position.
Source U.S. Environmental Protection Agency, Toxics Release Inventory · 2023 reporting year
MD regulatory profile by statute
Violation/site counts mapped to the EPA statutes this portal tracks
- CWA · NPDES
- RCRA · Subtitle C 26
What this shows Counts are mapped to statute as a structural proxy and reflect reported activity, not toxicity-weighted or population-adjusted risk. Clean Air Act (Title V) permit data is not currently ingested by this portal, so air-permit compliance is not shown here.
How Maryland compares across two EPA disclosure measures
The highlighted point is Maryland. The vertical axis is the share of tracked water systems with at least one health-based SDWIS record; the horizontal axis is TRI-reported pounds per facility on a logarithmic scale so the full state distribution stays readable. The crosshairs use the portal’s published national benchmark medians.
This matrix compares disclosure rates, not toxicity, exposure, current compliance, or drinking-water safety. A lower position on either axis is not a safety rating; use the underlying facility and water-system records for context.
According to EPA TRI, SDWIS, and Superfund NPL extracts, Maryland (MD) lists 210 TRI-reporting facilities disclosing 25.5M lbs of toxic releases. The same extracts list 26 Superfund sites and 481 EPA-regulated water systems, of which 187 carry health-based SDWIS violation rows. PlainEnviro's composite environmental health score for Maryland is 56/100 (grade F), benchmarked against all U.S. states on chemical release intensity, drinking-water health violations, Superfund site burden, and water violation rate. This is a percentile-derived composite from federal disclosure counts, not a clinical health-risk assessment.
F 56
Maryland Environmental Health Score
A percentile-benchmarked 0–100 composite from 4 EPA federal datasets, with weight redistribution for any unavailable dimension
Chemical Release Intensity C 79
121K (lbs per facility) Drinking Water Health Violations F 52
38.9% (% of systems) Superfund Site Burden F 5
12.4 (sites per 100 facilities) Water Violation Rate B 80
1.2 (violations per system) Benchmarks derived from EPA TRI, SDWIS, and Superfund NPL extracts across all 56 U.S. states and territories
Water Systems
481
Moderate
Superfund Sites
26
High
Total Releases
25.5M lbs
Moderate
Compliance Snapshot - MD
Sites with no recorded health violations 72.9%
Sites with at least one open violation 27.1%
Maryland's profile joins three independently maintained EPA programs into one statewide record: the Toxics Release Inventory (TRI, EPCRA Section 313 industrial disclosures), the Safe Drinking Water Information System (SDWIS, Safe Drinking Water Act compliance), and the Superfund National Priorities List. Each program uses its own reporting cadence and facility-identification scheme; PlainEnviro joins them by matched facility and system location rather than a shared federal ID, so a site absent from one program is never assumed absent from another. The counts below reflect the portal's rebuild as of August 2026.
Activity clusters in counties such as Anne Arundel, Frederick, Baltimore, which account for the highest combined facility, water-system, and Superfund presence. Monitoring and reporting violations are not included in the SDWIS counts shown here.
Every figure reflects the public regulatory record as filed with the U.S. Environmental Protection Agency and is not weighted for toxicity, geographic footprint, or population exposure. A state can rank high in any individual metric because of industrial history, naturally occurring contaminants in source water, or simply the number of reporting facilities, not because current residents face unsafe conditions. Drill into any county or water system below for the full disclosure record.
What does this state's environmental record show?
TRI Facilities
210
Water Systems
481
Superfund Sites
26
Health-Based Violation Records
556
Total Releases
25.5M lbs
cumulative, all reported years
Systems with Records
187
water systems
Release-over-release change
What changed for Maryland: EPA TRI 2023 reporting year
Same facilities, both years
-18.8%
150 facilities that filed in 2022 and 2023
Whole inventory
-21.6%
5.2 million lb → 4.0 million lb, every facility that filed
Between the two reporting years, 7 facilities filed for the first time and 19 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Maryland's total reported releases fell from 5.0 million lb in 2022 to 4.0 million lb in 2023, based on EPA TRI filings.
- Maryland's land releases fell from 1.9 million lb in 2022 to 1.2 million lb in 2023, based on EPA TRI filings.
- Maryland's air releases fell from 834.9 thousand lb in 2022 to 665.8 thousand lb in 2023, based on EPA TRI filings.
- Maryland's water releases fell from 83.7 thousand lb in 2022 to 67.2 thousand lb in 2023, based on EPA TRI filings.
Largest Polluters
View all →Water Quality
Systems with Health Violations
| Water System | Population | Violations |
|---|---|---|
| ECHO VALLEY MHP | 60 | 41 |
| TOWN OF NORTH EAST | 8,600 | 26 |
| SPRINGFIELD HOSPITAL DISTRIBUTION | 1,500 | 22 |
| GOLDEN KAY APARTMENTS | 148 | 21 |
| TOWN OF PERRYVILLE | 4,413 | 16 |
| PHELPS MOBILE HOME VILLA | 98 | 14 |
| CITY OF HAVRE DE GRACE | 14,000 | 10 |
| CITY OF POCOMOKE CITY | 4,100 | 9 |
| GLEN MEADOWS RETIREMENT COMMUNITY | 468 | 8 |
| CEDAR MOBILE HOME PARK | 300 | 8 |
| PERRY POINT V.A. MEDICAL CENTER | 2,000 | 8 |
| TOWN OF ST. MICHAELS | 2,650 | 8 |
| TOWN OF SNOW HILL | 2,409 | 8 |
| RIDGEVIEW MHP | 55 | 8 |
| TEBBSTON ON MAGOTHY | 52 | 7 |
| FREEDOM DISTRICT | 24,867 | 7 |
| IRISH CREEK MHP | 90 | 7 |
| TOWN OF BETTERTON | 481 | 6 |
| MIDLAND-LONACONING | 5,000 | 5 |
| LIBERTY MOBILE HOME PARK | 40 | 5 |
Cities with Water Issues
Frederick
19 water systems
Waldorf
18 water systems
Crofton
17 water systems
Berlin
10 water systems
Potomac
10 water systems
Salisbury
9 water systems
Stevensville
9 water systems
Baltimore
8 water systems
Gaithersburg
8 water systems
La Plata
8 water systems
Millersville
8 water systems
Port Deposit
8 water systems
Chestertown
7 water systems
Ellicott City
7 water systems
Oakland
7 water systems
Delmar
7 water systems
Hagerstown
6 water systems
Elkton
6 water systems
Westminster
6 water systems
North East
5 water systems
Superfund Sites (26)
Counties (25 total)
| County | Facilities |
|---|---|
| Anne Arundel | 23 |
| Frederick | 11 |
| Baltimore | 26 |
| Charles | 5 |
| Cecil | 6 |
| Washington | 19 |
| St. Mary's | 2 |
| Harford | 17 |
| Wicomico | 8 |
| Baltimore (city) | 28 |
| Calvert | 1 |
| Howard | 9 |
| Prince George's | 17 |
| Carroll | 8 |
| Montgomery | 10 |
| Worcester | 1 |
| Queen Anne's | 1 |
| Caroline | 3 |
| Garrett | 1 |
| Allegany | 3 |
Showing top 20 counties by environmental activity. Maryland has 25 counties total.
Cities with Environmental Records
Baltimore
34 facilities · 8 water systems
Hagerstown
11 facilities · 6 water systems
Frederick
9 facilities · 19 water systems
Jessup
8 facilities · 3 water systems
Williamsport
6 facilities · 4 water systems
Salisbury
5 facilities · 9 water systems
Belcamp
5 facilities · 0 water systems
Elkton
4 facilities · 6 water systems
Annapolis
4 facilities · 4 water systems
Havre De Grace
4 facilities · 3 water systems
Beltsville
4 facilities · 0 water systems
Cockeysville
4 facilities · 0 water systems
Fort George G Meade
4 facilities · 0 water systems
Rockville
4 facilities · 0 water systems
Chestertown
3 facilities · 7 water systems
Laurel
3 facilities · 1 water systems
Edgewood
3 facilities · 0 water systems
Odenton
3 facilities · 0 water systems
Upper Marlboro
3 facilities · 0 water systems
Westminster
2 facilities · 6 water systems
Frequently Asked Questions
How many TRI facilities are in Maryland? ▼
Maryland has 210 facilities that report to the EPA Toxic Release Inventory (TRI). These facilities have collectively reported 25.5M lbs in total toxic chemical releases. TRI data is self-reported annually by facilities that manufacture, process, or use listed toxic chemicals above threshold amounts.
Does Maryland have Superfund sites? ▼
Yes, Maryland has 26 sites on the EPA Superfund National Priorities List (NPL). Superfund sites are contaminated locations identified for long-term cleanup under the EPA Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA).
What does EPA SDWIS list for drinking water in Maryland? ▼
Maryland has 481 EPA-regulated water systems in the Safe Drinking Water Information System (SDWIS) extract used here. 187 water systems have a health-based violation row (MCL exceedance) in this historical extract. A past registry row is not a current drinkability verdict. For current utility conditions, contact the local water utility or the Maryland drinking water program. Source: EPA SDWIS.
What environmental data is available for Maryland? ▼
PlainEnviro provides three categories of EPA environmental data for Maryland: Toxic Release Inventory (TRI) data covering 210 industrial facilities, Safe Drinking Water Information System (SDWIS) data for 481 water systems, and Superfund National Priorities List (NPL) data for 26 contaminated sites.
How does Maryland compare to other states on EPA disclosure counts? ▼
Maryland has 210 TRI facilities with 25.5M lbs in total releases, 26 Superfund sites, and 556 water system violations on record. These are federal disclosure counts; they are not toxicity-weighted or population-adjusted risk scores. Source: EPA TRI, SDWIS, and Superfund NPL databases.
What is Maryland's environmental health score? ▼
PlainEnviro's composite environmental health score for Maryland is 56/100 (grade F). This score combines four percentile-benchmarked dimensions from EPA federal extracts: chemical release intensity per TRI facility, drinking-water health violation rate from SDWIS, Superfund site burden relative to industrial activity, and overall water violation rate. Scores are benchmarked against all 56 U.S. states and territories. When a dimension lacks data, its weight redistributes to the remaining dimensions so the score never deflates from missing inputs. This is a registry-count composite, not a clinical exposure or health-outcome assessment.
Explore More Data for Maryland
TRI Facilities in Maryland →
Every toxic-release facility reporting in the state, ranked by volume
Drinking Water Systems in Maryland →
Community water systems and their violation records
Air Quality in Maryland →
County-level AQI from EPA monitoring stations
Compare states by burden →
EJ screening scores for every U.S. county
State environmental rankings →
How states compare on releases, water and Superfund
Browse all states →
Environmental profiles for every U.S. state
About This Data
This page aggregates environmental data from three EPA programs for Maryland: the Toxic Release Inventory (TRI) for industrial chemical releases, the Safe Drinking Water Information System (SDWIS) for water quality, and the Superfund National Priorities List (NPL) for hazardous waste cleanup sites.
PlainEnviro presents this data without advocacy framing. Numbers reflect reported data and may not capture all environmental activity. For specific health or environmental concerns, contact your state environmental agency.
What to do with Maryland's data
Use this state profile as a starting point, then drill into the specific dataset that matters to you.
- Check the 210 TRI facilities reporting in Maryland for the largest reported releases near a specific county. View facilities
- 187 water systems in the state have a recorded health-based violation, check if yours is one of them. Check water systems
- See how Maryland compares to other states on releases, water violations, and Superfund sites. State rankings
Reported data reflects what facilities and agencies disclose to the EPA; it is not a complete measure of environmental risk or a substitute for local guidance.
Use and verify this record
Maryland's profile brings together EPA release, drinking-water, and Superfund records. It reports the underlying programs without making a health or environmental-risk determination.
State environmental figures are computed directly from EPA data. The methodology records the joins, definitions, and refresh cadence for each program.
PlainEnviro renders public EPA records directly from its data pipeline; no figure on this page is typed in by an editor. See the editorial standards and corrections policy for how source changes and reported errors are handled.