Passage Data · Check a report · Use it from your AI

Mining and Quarrying of Nonmetallic Minerals — NPDES discharge permits in Connecticut

Of the 5 permits in EPA's SIC 14 in CT, 0 went over a limit between 2025-10-01 and 2026-09-30. 5 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
Haynes Materials Company
CT0030465 · Dimension Stone
No value over a limitPermit past the expiry date EPA's file holds
SPECIALTY MINERALS, INC.
CT0003981 · Crushed And Broken Limestone
No value over a limitPermit past the expiry date EPA's file holds
TILCON CONNECTICUT INC.
CT0030155 · Crushed And Broken Stone
No value over a limitPermit past the expiry date EPA's file holds
TILCON CONNECTICUT, INC.
CT0000892 · Crushed And Broken Stone
No value over a limitPermit past the expiry date EPA's file holds
TILCON CONNECTICUT, INC.
CT0000906 · Crushed And Broken Stone
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=CT&sic=14, 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