TRI Facilities
10
Very low
GU · EPA TRI · SDWIS · Superfund
Guam environmental disclosure record
According to EPA's 2023 Toxics Release Inventory, Safe Drinking Water Information System, and Superfund National Priorities List extracts, this is Guam's full public registry profile, toxic releases, drinking-water systems, and Superfund sites in one place.
- TRI facilities
- 10
- Reported releases
- 2.0M lbs
- #52 of 56
- Water systems
- 5
- Superfund NPL sites
- 2
Guam vs. every U.S. state
Cumulative TRI-reported release pounds, with this state marked in the national distribution
2.0M lbs 7th percentile higher than 7% 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
GU regulatory profile by statute
Violation/site counts mapped to the EPA statutes this portal tracks
- CWA · NPDES
- RCRA · Subtitle C
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 Guam compares across two EPA disclosure measures
The highlighted point is Guam. 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, Guam (GU) lists 10 TRI-reporting facilities disclosing 2.0M lbs of toxic releases. The same extracts list 2 Superfund sites and 5 EPA-regulated water systems, of which 3 carry health-based SDWIS violation rows. PlainEnviro's composite environmental health score for Guam is 43/100 (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 43
Guam 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 72
198K (lbs per facility) Drinking Water Health Violations F 25
60.0% (% of systems) Superfund Site Burden F 5
20.0 (sites per 100 facilities) Water Violation Rate D 66
2.4 (violations per system) Benchmarks derived from EPA TRI, SDWIS, and Superfund NPL extracts across all 56 U.S. states and territories
Water Systems
5
Very low
Superfund Sites
2
Very low
Total Releases
2.0M lbs
Very low
Compliance Snapshot - GU
Sites with no recorded health violations 80.0%
Sites with at least one open violation 20.0%
Guam'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 Guam, 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
10
Water Systems
5
Superfund Sites
2
Health-Based Violation Records
12
Total Releases
2.0M lbs
cumulative, all reported years
Systems with Records
3
water systems
Release-over-release change
What changed for Guam: EPA TRI 2023 reporting year
Same facilities, both years
-31.7%
8 facilities that filed in 2022 and 2023
Whole inventory
-31.6%
341.4 thousand lb → 233.4 thousand lb, every facility that filed
Between the two reporting years, 1 facility filed for the first time and 1 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Guam's total reported releases fell from 341.1 thousand lb in 2022 to 232.9 thousand lb in 2023, based on EPA TRI filings.
- Guam's air releases fell from 129.0 thousand lb in 2022 to 32.4 thousand lb in 2023, based on EPA TRI filings.
- Guam's land releases rose from 1.5 thousand lb in 2022 to 1.8 thousand lb in 2023, based on EPA TRI filings.
- Guam's water releases fell from 210.5 thousand lb in 2022 to 198.7 thousand lb in 2023, based on EPA TRI filings.
Largest Polluters
View all →| # | Facility | Total Releases |
|---|---|---|
| 1 | Naval Base Guam-Apra Harbor WWTP | 1.1M lbs |
| 2 | Guam Power Authority | 756.7K lbs |
| 3 | South Pacific Petroleum Corp | 63.1K lbs |
| 4 | Andersen Air Force Base (us Air Force) | 14.3K lbs |
| 5 | Mobil Oil Guam Inc (cabras Island Terminal) | 13.6K lbs |
| 6 | Yigo Power Plant | 3.7K lbs |
| 7 | Tenjo Vista Power Plant | 1.4K lbs |
| 8 | Dededo Combustion Turbine Generating Facility | 479 lbs |
| 9 | Tristar Terminals Guam Inc. | 237 lbs |
| 10 | Hawaiian Rock Products-Guam | 187 lbs |
Water Quality
Systems with Health Violations
| Water System | Population | Violations |
|---|---|---|
| U.S. NAVY WATER SYSTEM | 12,780 | 6 |
| GWA CENTRAL WATER SYSTEM | 21,398 | 4 |
| GWA SOUTHERN WATER SYSTEM | 5,801 | 2 |
Cities with Water Issues
Superfund Sites (2)
| Site Name | Status | HRS Score |
|---|---|---|
| Andersen Air Force Base | NPL Site | 50.00 |
| Ordot Landfill | NPL Site | 0.00 |
Counties (1 total)
| County | Facilities |
|---|---|
| Guam | 10 |
Cities with Environmental Records
Piti
4 facilities · 0 water systems
Yigo
2 facilities · 0 water systems
Mangilao
1 facilities · 3 water systems
Agat
1 facilities · 0 water systems
Dededo
1 facilities · 0 water systems
Santa Rita
1 facilities · 0 water systems
Apo Ap
0 facilities · 1 water systems
Fp
0 facilities · 1 water systems
Ordot
0 facilities · 0 water systems
Frequently Asked Questions
How many TRI facilities are in Guam? ▼
Guam has 10 facilities that report to the EPA Toxic Release Inventory (TRI). These facilities have collectively reported 2.0M 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 Guam have Superfund sites? ▼
Yes, Guam has 2 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 Guam? ▼
Guam has 5 EPA-regulated water systems in the Safe Drinking Water Information System (SDWIS) extract used here. 3 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 Guam drinking water program. Source: EPA SDWIS.
What environmental data is available for Guam? ▼
PlainEnviro provides three categories of EPA environmental data for Guam: Toxic Release Inventory (TRI) data covering 10 industrial facilities, Safe Drinking Water Information System (SDWIS) data for 5 water systems, and Superfund National Priorities List (NPL) data for 2 contaminated sites.
How does Guam compare to other states on EPA disclosure counts? ▼
Guam has 10 TRI facilities with 2.0M lbs in total releases, 2 Superfund sites, and 12 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 Guam's environmental health score? ▼
PlainEnviro's composite environmental health score for Guam is 43/100 (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 Guam
TRI Facilities in Guam →
Every toxic-release facility reporting in the state, ranked by volume
Drinking Water Systems in Guam →
Community water systems and their violation records
Air Quality in Guam →
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 Guam: 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 Guam's data
Use this state profile as a starting point, then drill into the specific dataset that matters to you.
- Check the 10 TRI facilities reporting in Guam for the largest reported releases near a specific county. View facilities
- 3 water systems in the state have a recorded health-based violation, check if yours is one of them. Check water systems
- See how Guam 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
Guam'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.