Clean Water Act discharge permit · NPDES IA0072907
HEIDELBERG MATERIALS US CEMENT LLC (REMEDIATION SITE), Mason City, IA: NPDES IA0072907 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 5Pollutants under a numeric limit
- 2Pollutants with an effluent exceedance
HEIDELBERG MATERIALS US CEMENT LLC (REMEDIATION SITE), held by HEIDELBERG MATERIALS US CEMENT LLC, holds NPDES permit IA0072907. EPA’s file records it issued September 1, 2019 and expiring August 31, 2024. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | HEIDELBERG MATERIALS US CEMENT LLC (REMEDIATION SITE) |
|---|---|
| Permittee as filed | HEIDELBERG MATERIALS US CEMENT LLC |
| NPDES ID | IA0072907 |
| 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 | September 1, 2019 |
| Expiration date | August 31, 2024 |
| Issuing agency | STA |
| Address | Mason City, IA 50401 |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | City of Mason City-Winnebago River (HUC 070802030306) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 5Pollutants on file
- 5Under a numeric limit
- 4With a violation of any kind
- 2With 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 | 2 | 14 | 12 | December 31, 2025 | 197% over the limit |
| Iron, total [as Fe] | 4 | 7 | 3 | May 31, 2022 | 44% over the limit |
| Chloride [as Cl] | 4 | 4 | 0 | ||
| pH | 2 | 2 | 0 | ||
| Sulfate, total [as SO4] | 5 | 0 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES IA0072907.
Velarion’s copy of EPA’s ICIS-NPDES files does not yet include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID IA0072907 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.