Clean Water Act discharge permit · NPDES IA0067393
CONO RIDGE HAVEN, Walker, IA: NPDES IA0067393 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 7Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
CONO RIDGE HAVEN, held by RIDGE HAVEN INC., holds NPDES permit IA0067393. EPA’s file records it issued May 1, 2020 and expiring April 30, 2025.
CONO RIDGE HAVEN, Walker, Iowa: Individual permit IA0067393, held by RIDGE HAVEN INC.; Effective; issued May 1, 2020, term to April 30, 2025, by STA; Elementary and Secondary Schools.
- Solids, total suspended: 9 limits, 92 violations of any kind, 10 effluent exceedances, latest October 31, 2022, largest 377% over the limit.
- Nitrogen, ammonia total [as N]: 96 limits, 20 violations of any kind, 8 effluent exceedances, latest February 28, 2021, largest 1,650% over the limit.
- BOD, carbonaceous [5 day, 20 C]: 4 limits, 65 violations of any kind, 5 effluent exceedances, latest March 31, 2022, largest 28% over the limit.
- E. coli: 0 limits, 3 violations of any kind, 3 effluent exceedances, latest April 30, 2025, largest 292% over the limit.
- Oxygen, dissolved [DO]: 1 limit, 16 violations of any kind, 2 effluent exceedances, latest October 31, 2018, largest 7% over the limit.
- pH: 2 limits, 20 violations of any kind, 1 effluent exceedance, latest August 31, 2017.
- Chloride [as Cl]: 4 limits, 4 violations of any kind, 0 effluent exceedances.
- BOD, 5-day, 20 deg. C: 5 limits, 0 violations of any kind, 0 effluent exceedances.
CONO RIDGE HAVEN among its neighbors
EPA’s permit file holds 1 discharge permits in the Dry Creek-Wapsipinicon River subwatershed (HUC 070801020806), IA0067393 among them. Its county holds 15, 2 of them major permits; IA0067393 is a minor permit.
Identity
| Facility as filed | CONO RIDGE HAVEN |
|---|---|
| Permittee as filed | RIDGE HAVEN INC. |
| NPDES ID | IA0067393 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | May 1, 2020 |
| Expiration date | April 30, 2025 |
| Issuing agency | STA |
| Address | Walker, IA 52532 |
| Subwatershed | Dry Creek-Wapsipinicon River (HUC 070801020806) |
| NAICS | 611110 – Elementary and Secondary Schools |
| SIC | 8211 – Elementary And Secondary Schools |
Effluent limits and exceedances
- 8Pollutants on file
- 7Under a numeric limit
- 7With a violation of any kind
- 6With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 9 | 92 | 10 | October 31, 2022 | 377% over the limit |
| Nitrogen, ammonia total [as N] | 96 | 20 | 8 | February 28, 2021 | 1,650% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 65 | 5 | March 31, 2022 | 28% over the limit |
| E. coli | 0 | 3 | 3 | April 30, 2025 | 292% over the limit |
| Oxygen, dissolved [DO] | 1 | 16 | 2 | October 31, 2018 | 7% over the limit |
| pH | 2 | 20 | 1 | August 31, 2017 | |
| Chloride [as Cl] | 4 | 4 | 0 | ||
| BOD, 5-day, 20 deg. C | 5 | 0 | 0 |
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES IA0067393.
Inspections
EPA’s inspection file holds no inspection for NPDES IA0067393.
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 IA0067393.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.