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Humboldt, NV

Moderate Risk (45/100)

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. This is a different measure than the EJ Screening score for this county, which ranks it by percentile against other tracked counties rather than against these fixed caps.

Environmental data for Humboldt in Nevada · Population: 17,299

TRI sites such as Nevada Gold Mines LLC - Turquoise Ridge; Marigold Mining Co; Sierra Pacific Power Co North Valmy Station; SDWIS systems such as WINNEMUCCA CITY OF; GOLD COUNTRY ESTATES; STAR CITY PROPERTIES anchor Humboldt, NV's EPA extract. Derived burden score 45/100 (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 Humboldt include MCDERMITT WATER SYSTEM; VALMY STATION MOBILE HOME PARK, while Nevada Gold Mines LLC - Turquoise Ridge leads reported TRI pounds among local Form R filers. No AQS county monitors report here.

Burden score 45/100 (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 Humboldt -- 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 Humboldt, NV: EPA TRI 2023 reporting year

2022 → 2023

Same facilities, both years

+2.2%

7 facilities that filed in 2022 and 2023

Whole inventory

+2.2%

17.0 million lb → 17.4 million 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.

  • Humboldt, NV's total reported releases rose from 17.0 million lb in 2022 to 17.4 million lb in 2023, based on EPA TRI filings.
  • Humboldt, NV's off-site transfers rose from 515 lb in 2022 to 9.5 thousand lb in 2023, based on EPA TRI filings.
  • Humboldt, NV's water releases rose from 620 lb in 2022 to 798 lb in 2023, based on EPA TRI filings.
  • Humboldt, NV's air releases fell from 189.2 thousand lb in 2022 to 176.1 thousand lb in 2023, based on EPA TRI filings.
County population (Census ACS)
17,299
TRI Facilities
8
Water Systems
8
Superfund Sites
0
Total Releases
188.0M lbs

Water Systems (8)

System System pop (SDWIS) Violations
WINNEMUCCA CITY OF 8,518 0
GOLD COUNTRY ESTATES 1,695 0
STAR CITY PROPERTIES 285 0
VALLEY VIEW RV PARK 250 0
GOLCONDA GID 210 0
MCDERMITT WATER SYSTEM 200 20
OROVADA WATER DISTRICT 200 0
VALMY STATION MOBILE HOME PARK 96 3

TRI Facilities (8)

# Facility Total Releases
1 Nevada Gold Mines LLC - Turquoise Ridge 180.8M lbs
2 Marigold Mining Co 6.2M lbs
3 Sierra Pacific Power Co North Valmy Station 754.1K lbs
4 Hycroft Mine 240.1K lbs
5 Cyanco Co LLC 37.7K lbs
6 Goldcorp Dee LLC - Lone Tree Mine 12.8K lbs
7 Granite Creek Mine 5.3K lbs
8 Carry-On Trailer Corp 586 lbs

Cities in Humboldt (4)

Winnemucca
4 facilities · 5 water
Valmy
3 facilities · 1 water
Golconda
2 facilities · 1 water
Orovada
0 facilities · 1 water

Frequently Asked Questions

What is the environmental risk level in Humboldt, Nevada? ▼
Humboldt, NV has an environmental risk score of 45/100 (Moderate Risk), based on 8 TRI facilities, 0 Superfund sites, and 8 water systems on record. 2 water systems have health-based violations. Source: EPA TRI, SDWIS, and Superfund NPL.
Are there Superfund sites in Humboldt? ▼
No Superfund National Priorities List (NPL) sites are currently registered in Humboldt, NV in the EPA database.
How many toxic release facilities are in Humboldt? ▼
Humboldt, NV has 8 TRI-reporting facilities on record with the EPA Toxic Release Inventory, with a combined total of 188.0M lbs in reported toxic releases. TRI facilities self-report annual chemical release data to the EPA.
What is the air quality in Humboldt? ▼
Air quality monitoring data (EPA AQS) is not available for Humboldt, NV. This may indicate no EPA monitoring stations are located in the county. For regional air quality data, see the state environmental profile or visit EPA's AirNow.gov.
Is the drinking water safe in Humboldt? ▼
Humboldt, NV has 8 EPA-regulated water systems. 2 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 agencies cover Humboldt? ▼
Environmental compliance in Humboldt, Nevada is overseen by the U.S. Environmental Protection Agency (EPA) at the federal level and the Nevada state environmental agency. Facilities report to the EPA Toxic Release Inventory, water systems are regulated under the Safe Drinking Water Act, and contaminated sites are managed under the Superfund program. Contact your state environmental agency for local concerns.

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.

Related Guides

Understanding EPA Data
How EPA collects and publishes environmental data
Environmental Justice
Who lives near polluters and environmental hazards
How to Check Environmental Quality
Step-by-step guide to checking your local environment

Read our methodology - how this data is sourced, computed, and verified.

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Data sourced from U.S. EPA environmental datasets. See our methodology for details. Retrieved and formatted by PlainEnviro