NORTHERN NATURAL GAS COMPANY

NPDES permit IA0000299 · Minor NON-POTW · administratively continued, expires 2025-09-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

This permit expired on 2025-09-30 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

EPA's record, 2025-09-01 to 2026-08-31

0values over a limit
0required values missing, on 0 form(s)
0of 33 forms filed late

Last period with anything received: 2026-07-31.

Reporting

Reports are due about 15 days after each monitoring period ends (the most common figure among IA permits in EPA's filings — check your permit).

Limits in force (104)

OutfallParameterStatisticLimitMonths
001BOD, 5-day, 20 deg. C30DA AVG report only all year
001BOD, 5-day, 20 deg. CDAILY MX report only all year
001pHDAILY MN >= 6.5 SU all year
001pHDAILY MX <= 9 SU all year
001pH30DA AVG report only all year
001pHDAILY MX report only all year
001Solids, total suspended30DA AVG <= 30 mg/L all year
001Solids, total suspended7 DA AVG <= 45 mg/L all year
001Solids, total suspended30DA AVG report only all year
001Solids, total suspendedDAILY MX report only all year
001Nitrogen, ammonia total [as N]30DA AVG <= 3.6 mg/L Jan
001Nitrogen, ammonia total [as N]30DA AVG <= 1.7 mg/L Oct
001Nitrogen, ammonia total [as N]30DA AVG <= 4.2 mg/L Feb
001Nitrogen, ammonia total [as N]30DA AVG <= 2.6 mg/L Dec
001Nitrogen, ammonia total [as N]30DA AVG <= 1 mg/L Aug
001Nitrogen, ammonia total [as N]30DA AVG <= 1.8 mg/L May
001Nitrogen, ammonia total [as N]30DA AVG <= 1.1 mg/L Sep
001Nitrogen, ammonia total [as N]30DA AVG <= 1.4 mg/L Jun
001Nitrogen, ammonia total [as N]30DA AVG <= 1.6 mg/L Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 1.1 mg/L Jul
001Nitrogen, ammonia total [as N]30DA AVG <= 2.5 mg/L Nov
001Nitrogen, ammonia total [as N]30DA AVG <= 3.6 mg/L Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 19.9 mg/L Jan
001Nitrogen, ammonia total [as N]DAILY MX <= 2.7 mg/L Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 8.4 mg/L Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 3.9 mg/L Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 2.7 mg/L Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 3.2 mg/L May
001Nitrogen, ammonia total [as N]DAILY MX <= 2.7 mg/L Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 3.2 mg/L Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 4.7 mg/L Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 3.2 mg/L Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 2.7 mg/L Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 3.9 mg/L Mar
001Nitrogen, Kjeldahl, total [as N]30DA AVG report only all year
001Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
001Chloride [as Cl]30DA AVG <= 394 mg/L all year
001Chloride [as Cl]DAILY MX <= 630 mg/L all year
001Iron, total [as Fe]30DA AVG <= 8.28 mg/L all year
001Iron, total [as Fe]DAILY MX <= 8.28 mg/L all year
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L all year
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L all year
002pHDAILY MN >= 6.5 SU all year
002pHDAILY MX <= 9 SU all year
002Solids, total suspended30DA AVG <= 30 mg/L all year
002Solids, total suspended7 DA AVG <= 45 mg/L all year
002Nitrogen, ammonia total [as N]30DA AVG <= 1.1 mg/L Sep
002Nitrogen, ammonia total [as N]30DA AVG <= 4.2 mg/L Feb
002Nitrogen, ammonia total [as N]30DA AVG <= 2.5 mg/L Nov
002Nitrogen, ammonia total [as N]30DA AVG <= 1.4 mg/L Jun
002Nitrogen, ammonia total [as N]30DA AVG <= 3.6 mg/L Jan
002Nitrogen, ammonia total [as N]30DA AVG <= 2.6 mg/L Dec
002Nitrogen, ammonia total [as N]30DA AVG <= 1.7 mg/L Oct
002Nitrogen, ammonia total [as N]30DA AVG <= 1.6 mg/L Apr
002Nitrogen, ammonia total [as N]30DA AVG <= 1.8 mg/L May
002Nitrogen, ammonia total [as N]30DA AVG <= 1 mg/L Aug
002Nitrogen, ammonia total [as N]30DA AVG <= 1.1 mg/L Jul
002Nitrogen, ammonia total [as N]30DA AVG <= 3.6 mg/L Mar
002Nitrogen, ammonia total [as N]DAILY MX <= 2.7 mg/L Sep
002Nitrogen, ammonia total [as N]DAILY MX <= 8.4 mg/L Feb
002Nitrogen, ammonia total [as N]DAILY MX <= 2.7 mg/L Nov
002Nitrogen, ammonia total [as N]DAILY MX <= 3.2 mg/L Jun
002Nitrogen, ammonia total [as N]DAILY MX <= 19.9 mg/L Jan
002Nitrogen, ammonia total [as N]DAILY MX <= 3.9 mg/L Dec
002Nitrogen, ammonia total [as N]DAILY MX <= 2.7 mg/L Oct
002Nitrogen, ammonia total [as N]DAILY MX <= 4.7 mg/L Apr
002Nitrogen, ammonia total [as N]DAILY MX <= 3.2 mg/L May
002Nitrogen, ammonia total [as N]DAILY MX <= 2.7 mg/L Aug
002Nitrogen, ammonia total [as N]DAILY MX <= 3.2 mg/L Jul
002Nitrogen, ammonia total [as N]DAILY MX <= 3.9 mg/L Mar
002Chloride [as Cl]30DA AVG <= 394 mg/L all year
002Chloride [as Cl]DAILY MX <= 630 mg/L all year
002Iron, total [as Fe]30DA AVG <= 8.28 mg/L all year
002Iron, total [as Fe]DAILY MX <= 8.28 mg/L all year
002BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L all year
002BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L all year
SUMNitrogen, ammonia total [as N]30DA AVG <= 15.8 lb/d Apr
SUMNitrogen, ammonia total [as N]30DA AVG <= 24.1 lb/d Nov
SUMNitrogen, ammonia total [as N]30DA AVG <= 25.7 lb/d Dec
SUMNitrogen, ammonia total [as N]30DA AVG <= 41 lb/d Feb
SUMNitrogen, ammonia total [as N]30DA AVG <= 10.4 lb/d Jul
SUMNitrogen, ammonia total [as N]30DA AVG <= 35.3 lb/d Jan
SUMNitrogen, ammonia total [as N]30DA AVG <= 11 lb/d Sep
SUMNitrogen, ammonia total [as N]30DA AVG <= 16.1 lb/d Oct
SUMNitrogen, ammonia total [as N]30DA AVG <= 13.6 lb/d Jun
SUMNitrogen, ammonia total [as N]30DA AVG <= 9.9 lb/d Aug
SUMNitrogen, ammonia total [as N]30DA AVG <= 18 lb/d May
SUMNitrogen, ammonia total [as N]30DA AVG <= 35.3 lb/d Mar
SUMNitrogen, ammonia total [as N]DAILY MX <= 46.5 lb/d Apr
SUMNitrogen, ammonia total [as N]DAILY MX <= 26.2 lb/d Nov
SUMNitrogen, ammonia total [as N]DAILY MX <= 38.3 lb/d Dec
SUMNitrogen, ammonia total [as N]DAILY MX <= 83 lb/d Feb
SUMNitrogen, ammonia total [as N]DAILY MX <= 31.7 lb/d Jul
SUMNitrogen, ammonia total [as N]DAILY MX <= 196 lb/d Jan
SUMNitrogen, ammonia total [as N]DAILY MX <= 26.2 lb/d Sep
SUMNitrogen, ammonia total [as N]DAILY MX <= 26.2 lb/d Oct
SUMNitrogen, ammonia total [as N]DAILY MX <= 31.7 lb/d Jun
SUMNitrogen, ammonia total [as N]DAILY MX <= 26.2 lb/d Aug
SUMNitrogen, ammonia total [as N]DAILY MX <= 31.7 lb/d May
SUMNitrogen, ammonia total [as N]DAILY MX <= 38.4 lb/d Mar
SUMChloride [as Cl]30DA AVG <= 3873 lb/d all year
SUMChloride [as Cl]DAILY MX <= 6197 lb/d all year
SUMIron, total [as Fe]30DA AVG <= 81.4 lb/d all year
SUMIron, total [as Fe]DAILY MX <= 81.4 lb/d all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states