Clean Water Act discharge permit · NPDES SD0020010
MADISON, CITY OF, Madison, SD: NPDES SD0020010 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 29Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
MADISON, CITY OF, held by Madison, City of, holds NPDES permit SD0020010, which discharges to Silver Creek, Lake Madison. EPA’s file records it issued July 1, 2017 and expiring June 30, 2022. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | MADISON, CITY OF |
|---|---|
| Permittee as filed | Madison, City of |
| NPDES ID | SD0020010 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | July 1, 2017 |
| Expiration date | June 30, 2022 |
| Issuing agency | SDDENR |
| Address | Madison, SD 57042 |
| Receiving water | SILVER CREEK, LAKE MADISON |
| Subwatershed | Lake Madison (HUC 101702030703) |
| Program components on file | POTW, Pretreatment |
| NAICS | 221320 – Sewage Treatment Facilities |
| SIC | 4952 – Sewerage Systems |
| Other EPA IDs (FRS) | ICIS-AIR source SD0000004607900005 |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 43Pollutants on file
- 29Under a numeric limit
- 17With a violation of any kind
- 0With 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 |
|---|---|---|---|---|---|
| Silver, total [as Ag] | 0 | 3 | 0 | ||
| Cyanide, weak acid, dissociable | 1 | 2 | 0 | ||
| Cyanide, total [as CN] | 1 | 2 | 0 | ||
| Phenols | 1 | 2 | 0 | ||
| Arsenic, total [as As] | 0 | 2 | 0 | ||
| Beryllium, total [as Be] | 0 | 2 | 0 | ||
| Cadmium, total [as Cd] | 0 | 2 | 0 | ||
| Chromium, total [as Cr] | 0 | 2 | 0 | ||
| Copper, total [as Cu] | 0 | 2 | 0 | ||
| Lead, total [as Pb] | 0 | 2 | 0 | ||
| Thallium, total [as Tl] | 0 | 2 | 0 | ||
| Molybdenum, total [as Mo] | 0 | 2 | 0 | ||
| Nickel, total [as Ni] | 0 | 2 | 0 | ||
| Zinc, total [as Zn] | 0 | 2 | 0 | ||
| Antimony, total [as Sb] | 0 | 2 | 0 | ||
| Selenium, total [as Se] | 0 | 2 | 0 | ||
| Mercury, total [as Hg] | 0 | 2 | 0 | ||
| pH | 2 | 0 | 0 | ||
| Temperature, water deg. centigrade | 1 | 0 | 0 | ||
| Flow rate | 1 | 0 | 0 | ||
| BOD, 5-day, 20 deg. C | 1 | 0 | 0 | ||
| Solids, total suspended | 1 | 0 | 0 | ||
| Nitrogen, ammonia total [as N] | 1 | 0 | 0 | ||
| Arsenic, total recoverable | 1 | 0 | 0 | ||
| Selenium, total recoverable | 1 | 0 | 0 | ||
| Thallium, total recoverable | 1 | 0 | 0 | ||
| Beryllium, total recoverable [as Be] | 1 | 0 | 0 | ||
| Nickel, total recoverable | 1 | 0 | 0 | ||
| Silver total recoverable | 1 | 0 | 0 | ||
| Zinc, total recoverable | 1 | 0 | 0 | ||
| Cadmium, total recoverable | 1 | 0 | 0 | ||
| Lead, total recoverable | 1 | 0 | 0 | ||
| Chromium, total recoverable | 1 | 0 | 0 | ||
| Copper, total recoverable | 1 | 0 | 0 | ||
| Molybdenum, total recoverable | 1 | 0 | 0 | ||
| Antimony, total recoverable | 1 | 0 | 0 | ||
| E. coli, colony forming units [CFU] | 1 | 0 | 0 | ||
| Flow, total | 1 | 0 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 1 | 0 | 0 | ||
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 1 | 0 | 0 | ||
| Mercury, total recoverable | 1 | 0 | 0 | ||
| Coliform, total general | 1 | 0 | 0 | ||
| Duration of discharge | 1 | 0 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES SD0020010.
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
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| January 9, 2025 | Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | ST6 |
Velarion’s copy of EPA’s ICIS-NPDES files does not 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 SD0020010 there.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.