PlainEnviro

Jefferson, MT

Moderate Risk (33/100)

A PlainEnviro-computed score from reported facility/violation counts, not an official EPA rating, health forecast, or population-adjusted rate. See methodology.

Environmental data for Jefferson in Montana · Population: 12,501

Jefferson, MT is tracked across three EPA datasets covering 3 Toxics Release Inventory (TRI) facilities, 12 Safe Drinking Water Act systems, and 0 Superfund National Priorities List sites. Together these generate an environmental burden score of 33/100 (Moderate Risk), calibrated against national distributions for facility density, chemical release volume, Superfund concentration, and water-system health violations.

Industrial disclosures inside the county total 284.6K lbs of reported toxic releases under EPCRA Section 313, while 4 water systems carry an active health-based violation in the SDWIS record. No EPA Air Quality System monitors currently report data for this county.

All figures below draw directly from federal EPA records, TRI self-reported emissions, SDWIS compliance history, NPL Hazard Ranking System scores, and AQS daily AQI summaries, and are not adjusted, weighted, or forecast. A past violation or elevated score does not itself indicate current unsafe conditions; it documents the regulatory and disclosure history publicly filed with the U.S. Environmental Protection Agency through the most recent reporting cycle.

Population
12,501
TRI Facilities
3
Water Systems
12
Superfund Sites
0
Total Releases
284.6K lbs

Water Systems (12)

System Population Violations
WHITEHALL TOWN OF 1,500 87
BOULDER CITY OF 1,400 3
SADDLE MOUNTAIN CORP CLANCY 350 0
FOREST PARK WATER USERS ASSOCIATION 323 0
BLUE SKY HEIGHTS WUA CLANCY 250 20
BASIN COUNTY WATER AND SEWER DIST 200 3
HANGMANS TREE WUA 158 0
STONEY BROOK VILLAGE CONDOMINIUM ASSOC 142 0
ELKHORN HEALTH AND REHABILITATION LLC 89 0
JEFFERSON TRACTS ASSOC INC 80 0
RED CLIFF ESTATES HOA 48 0
ROCKY MOUNTAIN WUA 30 0

TRI Facilities (3)

# Facility Total Releases
1 Barrick Gold Corp-Golden Sunlight Mine 215.1K lbs
2 Ash Grove Cement Co Montana City Plant 69.5K lbs
3 Marks-Miller Post & Pole Inc 0 lbs

Cities in Jefferson (2)

Clancy
Pop: -
2 facilities · 9 water
Whitehall
Pop: -
1 facilities · 1 water

Frequently Asked Questions

What is the environmental risk level in Jefferson, Montana? ▼
Jefferson, MT has an environmental risk score of 33/100 (Moderate Risk), based on 3 TRI facilities, 0 Superfund sites, and 12 water systems on record. 4 water systems have health-based violations. Source: EPA TRI, SDWIS, and Superfund NPL.
Are there Superfund sites in Jefferson? ▼
No Superfund National Priorities List (NPL) sites are currently registered in Jefferson, MT in the EPA database.
How many toxic release facilities are in Jefferson? ▼
Jefferson, MT has 3 TRI-reporting facilities on record with the EPA Toxic Release Inventory, with a combined total of 284.6K lbs in reported toxic releases. TRI facilities self-report annual chemical release data to the EPA.
What is the air quality in Jefferson? ▼
Air quality monitoring data (EPA AQS) is not available for Jefferson, MT. 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 Jefferson? ▼
Jefferson, MT has 12 EPA-regulated water systems. 4 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 Jefferson? ▼
Environmental compliance in Jefferson, Montana is overseen by the U.S. Environmental Protection Agency (EPA) at the federal level and the Montana 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 Editorial