NPDES IA0081639 · Clean Water Act
MAPLE RIVER JUNCTION STP, Carroll, IA: NPDES IA0081639 discharge permit, effluent exceedances, inspections, penalties
MAPLE RIVER JUNCTION STP, Carroll, Iowa: Individual permit IA0081639, held by CARROLL COUNTY; Publicly owned treatment works; Administratively continued; issued August 1, 2016, term to July 31, 2021, by STA; Sewage Treatment Facilities.
1 of the 6 pollutants listed for NPDES IA0081639 have no violation or effluent exceedance.
- Nitrogen, ammonia total [as N]: 48 limits, 131 violations of any kind, 23 effluent exceedances, latest April 30, 2026, largest 177% over the limit.
- BOD, carbonaceous [5 day, 20 C]: 4 limits, 110 violations of any kind, 2 effluent exceedances, latest April 30, 2021, largest 69% over the limit.
- Solids, total suspended: 9 limits, 108 violations of any kind.
- pH: 2 limits, 54 violations of any kind.
- Nitrogen, Kjeldahl, total [as N]: 2 limits, 54 violations of any kind.
- BOD, 5-day, 20 deg. C: 5 limits.
Iowa holds 734 Publicly owned treatment works coverages of this permit type in EPA’s file; 139 were issued before IA0081639.
Coverages issued nearest IA0081639
- 2016-08-01: GRANGER CITY OF STP, Granger: IA0041912, held by CITY OF GRANGER
- 2016-08-01: CLEGHORN CITY OF STP, Cleghorn: IA0042846, held by CITY OF CLEGHORN
- 2016-08-01: THOR CITY OF STP, Thor: IA0058581, held by CITY OF THOR
- 2016-08-01: KELLERTON CITY OF STP, Kellerton: IA0061760, held by CITY OF KELLERTON
- 2016-08-01: MENLO CITY OF STP, Menlo: IA0071374, held by CITY OF MENLO
- 2016-09-01: WHITING CITY OF STP, Whiting: IA0032719, held by CITY OF WHITING
- 2016-09-01: TEMPLETON CITY OF STP, Templeton: IA0033782, held by CITY OF TEMPLETON
- 2016-09-01: OLIN CITY OF STP, Olin: IA0036064, held by CITY OF OLIN
- 2016-09-01: MACEDONIA CITY OF STP, Macedonia: IA0042919, held by CITY OF MACEDONIA
- 2016-09-01: ALLERTON CITY OF STP (SOUTH), Allerton: IA0054046, held by CITY OF ALLERTON
MAPLE RIVER JUNCTION STP among its neighbors
3 discharge permits are in the City of Carroll-Middle Raccoon River subwatershed (HUC 071000070203); IA0081639 is one. Its county: 22, 1 major; IA0081639 is minor permit.
Other permits in the City of Carroll-Middle Raccoon River subwatershed (HUC 071000070203)
- CARROLL, CITY OF STP, Carroll: IA0021377, major, term to 2027-08-31
- CITY OF CARROLL, Carroll: IAL021377, minor, term to 2025-12-31
Identity
| Facility | MAPLE RIVER JUNCTION STP |
|---|---|
| Permittee | CARROLL COUNTY |
| NPDES ID | IA0081639 |
| Status | Administratively continued |
| Type | Individual permit |
| Class | Minor |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | August 1, 2016 |
| Expires | July 31, 2021 |
| Agency | STA |
| Address | Carroll, IA 51401 |
| Subwatershed | City of Carroll-Middle Raccoon River (HUC 071000070203) |
| NAICS | 221320 – Sewage Treatment Facilities |
| SIC | 4952 – Sewerage Systems |
NPDES IA0081639: effluent limits and exceedances
MAPLE RIVER JUNCTION STP (NPDES IA0081639): 6 pollutants on file, 6 limited; 5 with a violation of any kind, 2 with an exceedance.
| Pollutant | Limits | Violations | Exceedances | Latest | Largest, as filed |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 48 | 131 | 23 | April 30, 2026 | 177% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 110 | 2 | April 30, 2021 | 69% over the limit |
| Solids, total suspended | 9 | 108 | 0 | ||
| pH | 2 | 54 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 2 | 54 | 0 | ||
| BOD, 5-day, 20 deg. C | 5 | 0 | 0 |
NPDES IA0081639: inspections, violations and enforcement
NPDES IA0081639 (MAPLE RIVER JUNCTION STP): no single-event violation, inspection, formal enforcement action and informal enforcement action on file.
Watch NPDES IA0081639
NPDES IA0081639: one email when its EPA record changes — $99/month.
Permits near NPDES IA0081639
NPDES IA0081639: 6 pollutant rows, 0 dated events; ICIS-NPDES download, loaded October 14, 2026.