Clean Water Act discharge permit · NPDES IA0084221
I35-105 INTERCHANGE COMMERCIAL DISTRICT, Northwood, IA: NPDES IA0084221 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 8Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
I35-105 INTERCHANGE COMMERCIAL DISTRICT, held by WORTH COUNTY, holds NPDES permit IA0084221. EPA’s file records it issued April 1, 2021 and expiring March 31, 2026.
I35-105 INTERCHANGE COMMERCIAL DISTRICT, Northwood, Iowa: Individual permit IA0084221, held by WORTH COUNTY; Administratively continued (past its expiration date and still in force until reissued); issued April 1, 2021, term to March 31, 2026, by STA.
- Nitrogen, nitrate total [as N]: 2 limits, 29 violations of any kind, 22 effluent exceedances, latest August 31, 2025, largest 4,196% over the limit.
- Nitrogen, ammonia total [as N]: 48 limits, 29 violations of any kind, 21 effluent exceedances, latest July 31, 2025, largest 115,103% over the limit.
- Oxygen, dissolved [DO]: 1 limit, 15 violations of any kind, 9 effluent exceedances, latest August 31, 2023, largest 98% over the limit.
- Solids, total suspended: 9 limits, 16 violations of any kind, 2 effluent exceedances, latest February 28, 2025, largest 111% over the limit.
- BOD, carbonaceous [5 day, 20 C]: 4 limits, 10 violations of any kind, 0 effluent exceedances.
- pH: 5 limits, 9 violations of any kind, 0 effluent exceedances.
- BOD, 5-day, 20 deg. C: 5 limits, 0 violations of any kind, 0 effluent exceedances.
- E. coli: 1 limit, 0 violations of any kind, 0 effluent exceedances.
I35-105 INTERCHANGE COMMERCIAL DISTRICT among its neighbors
EPA’s permit file holds 1 discharge permits in the Drainage Ditch 2 subwatershed (HUC 070802020201), IA0084221 among them. Its county holds 8, 0 of them major permits; IA0084221 is a minor permit.
Identity
| Facility as filed | I35-105 INTERCHANGE COMMERCIAL DISTRICT |
|---|---|
| Permittee as filed | WORTH COUNTY |
| NPDES ID | IA0084221 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | April 1, 2021 |
| Expiration date | March 31, 2026 |
| Issuing agency | STA |
| Address | Northwood, IA 50459 |
| Subwatershed | Drainage Ditch 2 (HUC 070802020201) |
Effluent limits and exceedances
- 8Pollutants on file
- 8Under a numeric limit
- 6With a violation of any kind
- 4With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Nitrogen, nitrate total [as N] | 2 | 29 | 22 | August 31, 2025 | 4,196% over the limit |
| Nitrogen, ammonia total [as N] | 48 | 29 | 21 | July 31, 2025 | 115,103% over the limit |
| Oxygen, dissolved [DO] | 1 | 15 | 9 | August 31, 2023 | 98% over the limit |
| Solids, total suspended | 9 | 16 | 2 | February 28, 2025 | 111% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 10 | 0 | ||
| pH | 5 | 9 | 0 | ||
| BOD, 5-day, 20 deg. C | 5 | 0 | 0 | ||
| E. coli | 1 | 0 | 0 |
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES IA0084221.
Inspections
EPA’s inspection file holds no inspection for NPDES IA0084221.
Formal enforcement and penalties
0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.
Informal enforcement
EPA’s informal enforcement file holds no action for NPDES IA0084221.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.