TRI Facilities
10
EPCRA Section 313 reporters
2023 EPA TRI data 10 facilities 4 water systems
Guam Environmental Profile
According to the U.S. Environmental Protection Agency's 2023 Toxics Release Inventory, Safe Drinking Water Information System, and Superfund National Priorities List, this is Guam's (GU) full public environmental-compliance record - toxic releases, drinking-water systems, and Superfund sites in one place.
GU regulatory profile by statute
Violation/site counts mapped to the EPA statutes this portal tracks
- CWA · NPDES
Clean Water Act, NPDES (water-system health violations)
2 records
- RCRA · Subtitle C
RCRA Subtitle C (Superfund-site proxy)
2 records
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.
Water Systems
4
SDWIS regulated
Superfund Sites
2
2 active NPL
Total Releases
2.0M lbs
TRI cumulative disclosure
Compliance Snapshot - GU
Sites with no recorded health violations 85.7%
Sites with at least one open violation 14.3%
Guam consolidates three federal EPA datasets into one statewide environmental profile: 10 Toxics Release Inventory (TRI) facilities reporting under EPCRA Section 313, 4 community water systems regulated under the Safe Drinking Water Act, and 2 sites on the Superfund National Priorities List.
TRI facilities in GU have cumulatively disclosed 2.0M lbs of toxic chemical releases, while SDWIS records show 6 total violations across the state's regulated water systems, of which 2 systems carry an active health-based violation (MCL exceedance or treatment-technique failure). Activity clusters in counties such as Guam, which account for the highest combined facility, water-system, and Superfund presence.
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
4
Superfund Sites
2
Total Violations
6
Total Releases
2.0M lbs
Health Violations
2
water systems
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 |
|---|---|---|
| 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 | - |
Counties (1 total)
| County | Facilities |
|---|---|
| Guam | 10 |
Largest Cities
Yigo
Pop: -
2 facilities · 0 water systems
Mangilao
Pop: -
1 facilities · 3 water systems
Piti
Pop: -
4 facilities · 0 water systems
Santa Rita
Pop: -
1 facilities · 0 water systems
Agat
Pop: -
1 facilities · 0 water systems
Dededo
Pop: -
1 facilities · 0 water systems
Apo Ap
Pop: -
0 facilities · 1 water systems
Ordot
Pop: -
0 facilities · 0 water systems
Frequently Asked Questions
How many polluting 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).
Is the water safe in Guam? ▼
Guam has 4 EPA-regulated water systems. 2 water systems have reported health-based violations (MCL exceedances). A past violation does not necessarily mean water is currently unsafe. For current water quality, contact your local water utility. 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 4 water systems, and Superfund National Priorities List (NPL) data for 2 contaminated sites.
How does Guam compare to other states environmentally? ▼
Guam has 10 TRI facilities with 2.0M lbs in total releases, 2 Superfund sites, and 6 water system violations on record. State-level environmental comparisons depend on many factors including industrial activity, population, and geographic size. Source: EPA TRI, SDWIS, and Superfund NPL databases.
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
- 2 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.
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from U.S. EPA environmental datasets. See our methodology for details. Retrieved and formatted by PlainEnviro Editorial
According to the U.S. Environmental Protection Agency, this state profile is drawn from PlainEnviro's database of more than 25,000 EPA-tracked facilities, the Safe Drinking Water Information System, and the Superfund National Priorities List, compiled since federal reporting began under the Emergency Planning and Community Right-to-Know Act in October 1986; see our methodology for full source citations and refresh cadence.
Every figure on PlainEnviro is rendered directly from EPA environmental compliance data, no number is typed in by an editor. State environmental figures are computed directly from EPA data. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.