Clean Water Act discharge permit · NPDES SDG860021
SIOUX FALLS, CITY OF (WTP), Sioux Falls, SD: NPDES SDG860021 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 13Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
SIOUX FALLS, CITY OF (WTP), held by SIOUX FALLS WTP, holds NPDES permit SDG860021, which discharges to Big Sioux River, Skunk Creek, Catfi. EPA’s file records it issued January 1, 2019 and expiring September 30, 2021. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | SIOUX FALLS, CITY OF (WTP) |
|---|---|
| Permittee as filed | SIOUX FALLS WTP |
| NPDES ID | SDG860021 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | January 1, 2019 |
| Expiration date | September 30, 2021 |
| Issuing agency | SDDANR |
| Address | Sioux Falls, SD 57104 |
| Receiving water | Big Sioux River, Skunk Creek, Catfi |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Falls of the Big Sioux River (HUC 101702031203) |
| Other EPA IDs (FRS) | RCRA handler SDD987671872; ICIS-AIR source SD0000004609900026 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 13Pollutants on file
- 13Under a numeric limit
- 1With a violation of any kind
- 1With 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 |
|---|---|---|---|---|---|
| Chlorine, total residual | 2 | 1 | 1 | March 31, 2026 | 8,321% over the limit |
| pH | 4 | 0 | 0 | ||
| Temperature, water deg. centigrade | 2 | 0 | 0 | ||
| Flow rate | 2 | 0 | 0 | ||
| Solids, total suspended | 2 | 0 | 0 | ||
| Nitrogen, ammonia total [as N] | 2 | 0 | 0 | ||
| Floating solids, waste or visible foam-visual | 2 | 0 | 0 | ||
| Flow, total | 2 | 0 | 0 | ||
| Duration of discharge | 2 | 0 | 0 | ||
| Conductivity | 1 | 0 | 0 | ||
| Sulfate, total [as SO4] | 1 | 0 | 0 | ||
| Fluoride, total [as F] | 1 | 0 | 0 | ||
| Solids, total dissolved | 1 | 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
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| August 14, 2024 | Effluent Violations - Reported Fish Kill | 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.
Watch this permit
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, SDG860021.
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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 SDG860021 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.