Coconino, AZ
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 Coconino in Arizona · Population: 144,643
TRI sites such as Salt River Project Navajo Generating Station; U.S. Natl Park Service - Grand Canyon National Park; W. L. Gore & Associates Inc.; SDWIS systems such as FLAGSTAFF CITY OF; GRAND CANYON NATIONAL PARK; DONEY PARK WATER anchor Coconino, AZ's EPA extract. Derived burden score 40/100 (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 Coconino include FLAGSTAFF CITY OF; GRAND CANYON NATIONAL PARK; DONEY PARK WATER, while Salt River Project Navajo Generating Station leads reported TRI pounds among local Form R filers. AQS median AQI 46 / peak 136 in 2024.
Burden score 40/100 (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 Coconino -- 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 Coconino, AZ: EPA TRI 2023 reporting year
Same facilities, both years
+317.1%
6 facilities that filed in 2022 and 2023
Whole inventory
+0.3%
18.3 thousand lb → 18.4 thousand lb, every facility that filed
Between the two reporting years, 0 facilities filed for the first time and 1 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Coconino, AZ's air releases rose from 4.0 thousand lb in 2022 to 16.6 thousand lb in 2023, based on EPA TRI filings.
- Coconino, AZ's land releases fell from 14.3 thousand lb in 2022 to 1.7 thousand lb in 2023, based on EPA TRI filings.
- Coconino, AZ's off-site transfers rose from 23 lb in 2022 to 37 lb in 2023, based on EPA TRI filings.
- Coconino, AZ's chemicals reported rose from 9 in 2022 to 10 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 | 250 (68%) | 111 | 5 | 136 |
| 2023 | 243 (67%) | 118 | 1 | 203 |
| 2022 | 279 (76%) | 85 | 1 | 101 |
| 2021 | 265 (73%) | 100 | 0 | 93 |
| 2020 | 302 (83%) | 64 | 0 | 93 |
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 Arizona, see the EPA's AirNow.gov.
Water Systems (45)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| FLAGSTAFF CITY OF | 79,796 | 1 |
| GRAND CANYON NATIONAL PARK | 16,590 | 13 |
| DONEY PARK WATER | 8,996 | 2 |
| PAGE CITY OF | 7,420 | 3 |
| GOLDEN SHORES WATER COMPANY | 3,970 | 4 |
| KACHINA VILLAGE DWID | 3,500 | 2 |
| WILLIAMS CITY OF | 3,145 | 21 |
| ASH FORK WATER SERVICE | 2,250 | 2 |
| Tuba City Boarding School BIA | 2,040 | 0 |
| BLUE RIDGE DWID | 1,920 | 0 |
| FOREST LAKES WATER IMPROVEMENT DISTRICT | 1,746 | 1 |
| Upper Moenkopi | 1,740 | 0 |
| FOREST HIGHLANDS WATER COMPANY | 1,668 | 0 |
| Hotevilla Village | 1,601 | 1 |
| PONDEROSA UTILITY CORP | 1,585 | 6 |
| SUNRISE VISTA UTILITIES | 1,500 | 0 |
| BEARIZONA | 1,423 | 1 |
| FREDONIA TOWN OF | 1,327 | 0 |
| CAMERON TRADING POST | 1,270 | 15 |
| Bacavi Village | 943 | 0 |
| Havasupai Village | 885 | 2 |
| GLEN CANYON NRA WAHWEAP | 579 | 2 |
| ESCAPEES AT NORTH RANCH | 500 | 0 |
| Lower Moencopi - Spring Source | 465 | 17 |
| GRAND CANYON JUNCTION HYDRO | 430 | 0 |
| Kaibab Village | 407 | 12 |
| Kaibeto (Upper) Boarding School BIA | 400 | 0 |
| Tonalea (Red Lake) Day School BIA | 300 | 0 |
| MOUNTAIN DELL WATER INC | 250 | 2 |
| PAINTED DESERT DEMO PROJECT STAR SCHOOL | 250 | 1 |
| Leupp Contract Boarding School BIA | 250 | 0 |
| GREEN VALLEY MHP | 190 | 60 |
| Navajo Mountain Community Boarding School BIA | 163 | 6 |
| TALL PINES ESTATES WATER | 156 | 4 |
| LAKE MARY COUNTRY STORE | 130 | 2 |
| Moccasin Domestic Water Improvement District | 96 | 0 |
| HECKETHORN WATER COMPANY | 90 | 2 |
| Six Mile and Steamboat Village | 88 | 2 |
| USFS KNF TUSAYAN ADMIN | 80 | 7 |
| MAJESTIC VIEW WATER IMPROVEMENT DISTRICT | 70 | 17 |
| SAGE VALLEY MHP | 55 | 7 |
| A1 RANCH DWID | 45 | 0 |
| LOCKETT ESTATES | 30 | 3 |
| JACOB LAKE LODGE | 27 | 1 |
| HUC Regional Water System | 0 | 0 |
TRI Facilities (8)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Salt River Project Navajo Generating Station | 891.7K lbs |
| 2 | U.S. Natl Park Service - Grand Canyon National Park | 77.7K lbs |
| 3 | W. L. Gore & Associates Inc. | 20.9K lbs |
| 4 | U.S. Army National Guard Camp Navajo Range | 7.2K lbs |
| 5 | Nestle Purina Petcare Co | 4.8K lbs |
| 6 | Schuff Steel Co-Flagstaff | 516 lbs |
| 7 | Flagstaff Plant #21 | 5 lbs |
| 8 | Cemex - Flagstaff #1971 | 0 lbs |
Cities in Coconino (17)
Frequently Asked Questions
What is the environmental risk level in Coconino, Arizona? ▼
Are there Superfund sites in Coconino? ▼
How many toxic release facilities are in Coconino? ▼
What is the air quality in Coconino? ▼
Is the drinking water safe in Coconino? ▼
What environmental agencies cover Coconino? ▼
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.