PlainEnviro

Mountrail, ND

Moderate Risk (41/100)

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.

Environmental data for Mountrail in North Dakota · Population: 9,567

TRI sites such as Andeavor Field Services LLC - Robinson Lake Gas Plant; Aux Sable Midstream; Palermo Product Terminal; SDWIS systems such as NEW TOWN, CITY OF; LITTLE SHELL; FOUR BEARS WATER SYSTEM anchor Mountrail, ND's EPA extract. Derived burden score 41/100 (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 Mountrail include FOUR BEARS WATER SYSTEM; PARSHALL, CITY OF; WHITE SHIELD WATER TREATMENT PLANT, while Andeavor Field Services LLC - Robinson Lake Gas Plant leads reported TRI pounds among local Form R filers. No AQS county monitors report here.

Burden score 41/100 (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 Mountrail -- 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 Mountrail, ND: EPA TRI 2023 reporting year

2022 → 2023

Same facilities, both years

-83.7%

3 facilities that filed in 2022 and 2023

Whole inventory

-83.7%

294.4 thousand lb → 48.0 thousand lb, every facility that filed

Between the two reporting years, 0 facilities filed for the first time and 2 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.

  • Mountrail, ND's total reported releases fell from 293.8 thousand lb in 2022 to 48.0 thousand lb in 2023, based on EPA TRI filings.
  • Mountrail, ND's land releases rose from 0 lb in 2022 to 152 lb in 2023, based on EPA TRI filings.
  • Mountrail, ND's off-site transfers rose from 5.1 thousand lb in 2022 to 23.4 thousand lb in 2023, based on EPA TRI filings.
  • Mountrail, ND's air releases fell from 288.7 thousand lb in 2022 to 24.5 thousand lb in 2023, based on EPA TRI filings.
County population (Census ACS)
9,567
TRI Facilities
5
Water Systems
10
Superfund Sites
0
Total Releases
357.9K lbs

Water Systems (10)

System System pop (SDWIS) Violations
NEW TOWN, CITY OF 2,528 0
LITTLE SHELL 1,500 0
FOUR BEARS WATER SYSTEM 1,200 6
PARSHALL, CITY OF 1,200 9
STANLEY CITY OF 1,138 0
MANDAREE WATER PLANT 1,034 0
WHITE SHIELD WATER TREATMENT PLANT 952 18
TWIN BUTTES WATER PLANT 792 22
PARSHALL-LUCKY MOUND 720 4
ROSS CITY OF 97 0

TRI Facilities (5)

# Facility Total Releases
1 Andeavor Field Services LLC - Robinson Lake Gas Plant 303.4K lbs
2 Aux Sable Midstream 30.8K lbs
3 Palermo Product Terminal 21.4K lbs
4 Cicada Logistics 1.9K lbs
5 Andeavor Field Services LLC - Stanley Compressor Station 397 lbs

Cities in Mountrail (5)

New Town
2 facilities · 7 water
Palermo
2 facilities · 0 water
Stanley
1 facilities · 1 water
Parshall
0 facilities · 1 water
Ross
0 facilities · 1 water

Frequently Asked Questions

What is the environmental risk level in Mountrail, North Dakota? ▼
Mountrail, ND has an environmental risk score of 41/100 (Moderate Risk), based on 5 TRI facilities, 0 Superfund sites, and 10 water systems on record. 5 water systems have health-based violations. Source: EPA TRI, SDWIS, and Superfund NPL.
Are there Superfund sites in Mountrail? ▼
No Superfund National Priorities List (NPL) sites are currently registered in Mountrail, ND in the EPA database.
How many toxic release facilities are in Mountrail? ▼
Mountrail, ND has 5 TRI-reporting facilities on record with the EPA Toxic Release Inventory, with a combined total of 357.9K lbs in reported toxic releases. TRI facilities self-report annual chemical release data to the EPA.
What is the air quality in Mountrail? ▼
Air quality monitoring data (EPA AQS) is not available for Mountrail, ND. 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 Mountrail? ▼
Mountrail, ND has 10 EPA-regulated water systems. 5 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 Mountrail? ▼
Environmental compliance in Mountrail, North Dakota is overseen by the U.S. Environmental Protection Agency (EPA) at the federal level and the North Dakota 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.

Related

Browse all → | Rankings →
Data sourced from U.S. EPA environmental datasets. See our methodology for details. Retrieved and formatted by PlainEnviro