Clean Water Act discharge permit · NPDES IA0068381
DIAMONDHEAD LAKE, Dexter, IA: NPDES IA0068381 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 8Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
DIAMONDHEAD LAKE, held by DIAMONDHEAD SANITARY DISTRICT, holds NPDES permit IA0068381. EPA’s file records it issued May 1, 2019 and expiring April 30, 2024.
DIAMONDHEAD LAKE, Dexter, Iowa: Individual permit IA0068381, held by DIAMONDHEAD SANITARY DISTRICT; Administratively continued (past its expiration date and still in force until reissued); issued May 1, 2019, term to April 30, 2024, by STA; Other Similar Organizations [except Business, Professional, Labor, and Political Organizations].
- Flow, in conduit or thru treatment plant: 0 limits, 34 violations of any kind, 31 effluent exceedances, latest March 31, 2008, largest 79,096% over the limit.
- Nitrogen, ammonia total [as N]: 48 limits, 10 violations of any kind, 10 effluent exceedances, latest May 31, 2026, largest 343% over the limit.
- pH: 2 limits, 18 violations of any kind, 9 effluent exceedances, latest May 31, 2025.
- Solids, total suspended: 7 limits, 13 violations of any kind, 4 effluent exceedances, latest October 31, 2011, largest 72% over the limit.
- BOD, carbonaceous [5 day, 20 C]: 7 limits, 12 violations of any kind, 4 effluent exceedances, latest May 31, 2018, largest 124% over the limit.
- E. coli: 3 limits, 1 violation of any kind, 1 effluent exceedance, latest November 30, 2025, largest 1,740% over the limit.
- Nitrogen, Kjeldahl, total [as N]: 5 limits, 3 violations of any kind, 0 effluent exceedances.
- Nitrogen, total Kjeldahl: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Depth of pond or reservoir in feet: 3 limits, 0 violations of any kind, 0 effluent exceedances.
DIAMONDHEAD LAKE among its neighbors
EPA’s permit file holds 2 discharge permits in the Long Branch-South Raccoon River subwatershed (HUC 071000070704), IA0068381 among them. Its county holds 16, 0 of them major permits; IA0068381 is a minor permit.
Other permits in the Long Branch-South Raccoon River subwatershed (HUC 071000070704)
- STUART CITY OF STP, Stuart: IA0041858, minor permit, permit term to January 31, 2025
Identity
| Facility as filed | DIAMONDHEAD LAKE |
|---|---|
| Permittee as filed | DIAMONDHEAD SANITARY DISTRICT |
| NPDES ID | IA0068381 |
| 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 | May 1, 2019 |
| Expiration date | April 30, 2024 |
| Issuing agency | STA |
| Address | Dexter, IA 50070 |
| Subwatershed | Long Branch-South Raccoon River (HUC 071000070704) |
| NAICS | 813990 – Other Similar Organizations [except Business, Professional, Labor, and Political Organizations] |
| SIC | 8641 – Civic And Social Associations |
Effluent limits and exceedances
- 9Pollutants on file
- 8Under a numeric limit
- 8With 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 |
|---|---|---|---|---|---|
| Flow, in conduit or thru treatment plant | 0 | 34 | 31 | March 31, 2008 | 79,096% over the limit |
| Nitrogen, ammonia total [as N] | 48 | 10 | 10 | May 31, 2026 | 343% over the limit |
| pH | 2 | 18 | 9 | May 31, 2025 | |
| Solids, total suspended | 7 | 13 | 4 | October 31, 2011 | 72% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 7 | 12 | 4 | May 31, 2018 | 124% over the limit |
| E. coli | 3 | 1 | 1 | November 30, 2025 | 1,740% over the limit |
| Nitrogen, Kjeldahl, total [as N] | 5 | 3 | 0 | ||
| Nitrogen, total Kjeldahl | 1 | 1 | 0 | ||
| Depth of pond or reservoir in feet | 3 | 0 | 0 |
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES IA0068381.
Inspections
EPA’s inspection file holds no inspection for NPDES IA0068381.
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 IA0068381.
Watch this permit
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.