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Natural Gas Transmission — NPDES discharge permits in Iowa

Of the 4 permits in EPA's SIC 4922 in IA, 1 went over a limit between 2025-10-01 and 2026-09-30 (E. coli: 1). 1 is past the expiry date EPA's file holds; 1 has a renewal application overdue or due within 18 months. EPA's file of 2026-10-15.

FacilityLast 12 monthsPermit
NORTHERN NATURAL GAS COMPANY
IA0046957 · Natural Gas Transmission
Over a limit 1×: E. coli (1×)Expires Jan 31, 2030
NATURAL GAS PIPELINE COMPANY OF AMERICA
IA0058262 · Natural Gas Transmission
No value over a limitRenewal application due Dec 3, 2027
NORTHERN NATURAL GAS
IA0004391 · Natural Gas Transmission
No value over a limitExpires Jan 31, 2031
NORTHERN NATURAL GAS COMPANY
IA0000299 · Natural Gas Transmission
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=IA&sic=4922, 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