Santa Cruz, 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 Santa Cruz in Arizona · Population: 48,209
TRI sites such as Hermosa; US Cbp Nogales Border Patrol Station & Range #AZ0047; Calportland Co Rio Rico Plant; SDWIS systems such as NOGALES CITY OF; PATAGONIA WATER DEPARTMENT; THE GRAND ACRES anchor Santa Cruz, AZ's EPA extract. Derived burden score 35/100 (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 Santa Cruz include NOGALES CITY OF; THE GRAND ACRES; KINO RANCH 2, while Hermosa leads reported TRI pounds among local Form R filers. AQS median AQI 43 / peak 494 in 2024.
Burden score 35/100 (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 Santa Cruz -- 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 Santa Cruz, AZ: EPA TRI 2023 reporting year
Same facilities, both years
+26.4%
2 facilities that filed in 2022 and 2023
Whole inventory
+27.8%
69.3 thousand lb → 88.6 thousand lb, every facility that filed
Between the two reporting years, 1 facility filed for the first time and 0 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Santa Cruz, AZ's total reported releases rose from 69.3 thousand lb in 2022 to 87.6 thousand lb in 2023, based on EPA TRI filings.
- Santa Cruz, AZ's off-site transfers rose from 0 lb in 2022 to 3.2 thousand lb in 2023, based on EPA TRI filings.
- Santa Cruz, AZ's water releases rose from 0 lb in 2022 to 752 lb in 2023, based on EPA TRI filings.
- Santa Cruz, AZ's chemicals reported rose from 2 in 2022 to 4 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 | 213 (59%) | 139 | 8 | 494 |
| 2023 | 265 (74%) | 92 | 1 | 145 |
| 2022 | 220 (62%) | 136 | 1 | 138 |
| 2021 | 169 (47%) | 189 | 1 | 171 |
| 2020 | 208 (58%) | 147 | 4 | 170 |
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 (9)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| NOGALES CITY OF | 22,000 | 5 |
| PATAGONIA WATER DEPARTMENT | 819 | 0 |
| THE GRAND ACRES | 153 | 1 |
| KINO RANCH 2 | 109 | 2 |
| AVALON GARDENS WATER SYSTEM | 100 | 2 |
| MOUNTAIN VIEW RV RANCH | 100 | 2 |
| TRUJILLO TRAIL DWID | 75 | 2 |
| CASAS ARROYO ASSOCIATION INC | 27 | 4 |
| RED ROCK ACRES HOA | 23 | 3 |
TRI Facilities (3)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Hermosa | 252.8K lbs |
| 2 | US Cbp Nogales Border Patrol Station & Range #AZ0047 | 6.7K lbs |
| 3 | Calportland Co Rio Rico Plant | 0 lbs |
Cities in Santa Cruz (5)
Frequently Asked Questions
What is the environmental risk level in Santa Cruz, Arizona? ▼
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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.