Pollution in Boulder County, Colorado

Boulder County contains 446 EPA-regulated facilities, 25 of which are currently flagged for significant noncompliance. The county also hosts 2 Superfund sites and 16 TRI chemical reporters. EPA has assessed $14.8M in lifetime penalties and TRI reporters disclosed roughly 40.5k lb of on-site releases. That facility count is well above the Colorado state average of 99 per county.

Superfund2NPL sites
TRI Facilities16reporters
EPA Facilities446regulated
Sig. Violators25current SNC

Superfund sites

SiteCityStatus
Marshall LandfillBoulderConstruction complete
Captain Jack MillWardCleanup underway

Largest releasers

FacilityCityOn-site (lb)Status
Cordenpharma Colorado, Inc.Boulder23.2kCompliant
Sherwood EnterprisesLongmont7.4kCompliant
Cemex Construction Materials South LlcLyons4.0kSig. violation
Corden Pharma - Sterling DriveBoulder4.0kCompliant
Lexmark International IncLongmont1.3kCompliant
Agilent Technologies Us, Inc.Boulder484Compliant
Dharmacon, Inc. - 2650 Crescent DrLafayette133Compliant
Western Foundries IncLongmont73Sig. violation
Micro Motion Inc - 7070 Winchester CirBoulder15Compliant
Matheson Trigas Longmont Co BranchLongmont1Compliant

Significant violators

FacilityCityPenaltiesLast Inspected
Cemex Construction Materials South LlcLyons$1.9M2025-08-20
Western Aggregates Incorporated (Txi)Boulder$688.0k2025-09-23
Boulder Open Space Seep Outfalls 002a And 003aBoulder$458.2k
Univ Of Colo Boulder - CampusBoulder$35.0k2025-09-29
Western Foundries IncLongmont$02024-04-24
Lchwm LlcLongmont$02025-05-14
Murphy Express LouisvilleLouisville$02024-01-24
Highlands Presbyterian CampAllenspark$02015-07-23
Pearl PlaceBoulder$0
Arcosa Esc BoulderBoulder$02015-12-22
19 And Upland Ave Gas MainBoulder$0
San Lazaro Mhp WwtfBoulder$02024-07-12
Lyons Town OfLyons$02022-11-15
Star PrecisionLongmont$02020-02-06
75th Street Wastewater Treatment PlantBoulder$02024-12-19
Longmont Batch PlantBoulder County$01991-07-11
Cu Boulder - Chemistry & Applied MathematicsBoulder$0
Red Lion Inn WwtfBoulder County$02016-01-20
Blue Leaf School Llc-Treatment At Tank Ywtp01Aurora$0
Peaceful Valley Resort LlcLyons$02023-03-22
Highlands Presbyterian CampAllenspark$02008-08-22
South Boulder Creek Regional DetentionBoulder$0
Irwin Thomas PitLongmont$0
San Souci MhpBoulder County$02013-12-18
Barnard QuarryBoulder County$0