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Stone, Clay, Glass and Concrete Products — NPDES discharge permits in Colorado

Of the 3 permits in EPA's SIC 32 in CO, 1 went over a limit between 2025-10-01 and 2026-09-30 (Flow, in conduit or thru treatment plant: 1). 3 are past the expiry date EPA's file holds; 0 have a renewal application overdue or due within 18 months. EPA's file of 2026-10-15.

FacilityLast 12 monthsPermit
Coorstek Inc
CO0044890 · Porcelain Electrical Supplies
Over a limit 1×: Flow, in conduit or thru treatment plant (1×)Permit past the expiry date EPA's file holds
CEMEX Construction Materials South LLC
CO0048771 · Cement, Hydraulic
No value over a limit; 1 required values not reportedPermit past the expiry date EPA's file holds
Holcim US Inc
CO0000671 · Cement, Hydraulic
No value over a limitPermit past the expiry date EPA's file holds

The record is EPA's ICIS-NPDES file of 2026-10-15: values filed against each limit between Oct 1, 2025 and Sep 30, 2026. No reports on file may be EPA's gap, not the facility's.

For programs and AI agents: this screen as JSON at /api/v1/permits?state=CO&sic=32, narrowed with &over_limit=true, &parameter=phosphorus or &renewal=due; or add https://passage-data.com/mcp as a remote MCP server (tool list_permits). Free, no key. llms.txt

From EPA's ECHO data, not the permit document itself: your permit is the final word. All states