Zip Code 58831
📍 Alexander, ND
Toxic Air Emissions Report (2024)
Data Source: EPA TRI (2024) • Updated Nov 2025
33,499.57 lbs
State Score
45
/ 100
National Score
21
/ 100
In 2024, industrial facilities in Alexander, ND released over 33,499.57 lbs of pollutants. The primary source was ONEOK ROCKIES MIDSTREAM LLC - GRASSLANDS GAS PLANT, which emitted large quantities of n-Hexane into the local air. Residents of 58831 face significantly higher exposure risks than the national average.
Top Polluting Facilities
- ONEOK ROCKIES MIDSTREAM LLC - GRASSLANDS GAS PLANTOwned by: ONEOK INCn-Hexane released to air10,885.00 lbsLBS
- ONEOK ROCKIES MIDSTREAM LLC - GRASSLANDS GAS PLANTOwned by: ONEOK INCCyclohexane released to air4,920.00 lbsLBS
- WATFORD CITY PLANTOwned by: KINDER MORGANn-Hexane released to air4,482.00 lbsLBS
- WATFORD CITY PLANTOwned by: KINDER MORGANXylene (mixed isomers) released to air3,455.57 lbsLBS
- LONESOME CREEK GAS PLANTOwned by: ONEOK INCn-Hexane released to air3,165.00 lbsLBS
- WATFORD CITY PLANTOwned by: KINDER MORGANToluene released to air2,156.00 lbsLBS
- ONEOK ROCKIES MIDSTREAM LLC - GRASSLANDS GAS PLANTOwned by: ONEOK INCToluene released to air1,687.00 lbsLBS
- WATFORD CITY PLANTOwned by: KINDER MORGANMethanol released to air1,249.00 lbsLBS
- WATFORD CITY PLANT Cancer RiskOwned by: KINDER MORGANEthylbenzene released to air1,019.00 lbsLBS
- ONEOK ROCKIES MIDSTREAM LLC - GRASSLANDS GAS PLANT Cancer RiskOwned by: ONEOK INCBenzene released to air427.00 lbsLBS
- LONESOME CREEK GAS PLANT Cancer RiskOwned by: ONEOK INCBenzene released to air54 lbsLBS
Nearby Pollution Sources (< 20 miles)
- Watford City, ND (58854) 18.4 mi awayHeavy Industrial Activity35,245.12 lbsAnnual Emissions
- Arnegard, ND (58835) 9.4 mi awayHeavy Industrial Activity8,128.00 lbsAnnual Emissions
Check Nearby Zip Codes
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Protect Your Lungs
Because toxic gases and VOCs were detected in this area (likely from the Toluene), standard filters are not enough. We strongly recommend an Activated Carbon purifier to adsorb these fumes.
View Recommended Carbon Filters →Chemical Breakdown
Top 5 Pollutants by Weight
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