South Dakota NPDES permit search
Status, expiry and violations for 129 municipal wastewater permits · issued by DANR as Surface Water Discharge permits
In short
How do I look up an NPDES permit in South Dakota?
Search this page by permit number or plant name for a municipal plant’s permit status, expiry date and violations. For the official file, search the Surface Water Discharge Permits map or DANR’s public notices. EPA’s ECHO database shows the monitoring results and violations of every permit. The 211 industrial permits in South Dakota are listed in Klarifi with a free account.
Links to official sources checked September 2026.
Effective
76
Administratively continued
52
Expired
0
Plants with effluent violations, 3 years
70
Where to find official South Dakota NPDES records
South Dakota Department of Agriculture and Natural Resources (DANR) runs the NPDES program in South Dakota under authorization from EPA Region 8. It issues and enforces the permits, which it calls Surface Water Discharge permits, and keeps the official file: applications, permits, fact sheets and monitoring reports. EPA Region 8 issues the permits on tribal lands. DANR website ↗
permits
Click a facility on the map for its basic permit information. For the full permit and compliance history DANR points to EPA’s ECHO; permit documents need a public records request.
permit documents
The “Surface Water Discharge (NPDES)” section lists the permits on public notice, each with the notice, the draft permit and the statement of basis.
permits · DMRs · inspections · violations · enforcement
EPA’s Enforcement and Compliance History Online. Search water facilities by permit number, name or city; the Detailed Facility Report lists inspections, violations and enforcement actions, and Effluent Charts plot monitoring results against the permit limits.
- Discharge monitoring reports
- Through EPA’s NetDMR, required since December 2016.
Industrial and commercial NPDES permits in South Dakota
Most NPDES permits are not held by municipal plants. EPA’s permit database lists 211 individual permits in force for industrial and commercial facilities in South Dakota (manufacturers, food processors, mines, power plants, landfills), 11 of them major dischargers, plus 105 facilities covered by a general permit, mostly for stormwater. 28 of the individual permits recorded at least one effluent violation in the last three years.
| Facility | Permit | Status | Expires | Effluent violations |
|---|
Unlock 211 industrial permits in South Dakota
Search every industrial and commercial discharger in South Dakota by name or permit number, with permit status, expiry and violation history. Free with a Klarifi account.
Industrial and commercial NPDES permits in South Dakota: permits in force (effective or administratively continued) held by facilities EPA does not class as publicly owned treatment works or federal facilities. Source: EPA ICIS-NPDES via Klarifi, October 2026.
Violations at South Dakota wastewater plants
70 of the 129 municipal plants on this page recorded at least one effluent violation, a monitored value above a permit limit, in the last three years, and 96 had a violation of any kind, including late or missing monitoring reports. Each plant’s page shows its own count. EPA’s enforcement records list 6 formal cases naming South Dakota wastewater plants, 1 of them since fiscal year 2020, with $5,375 in penalties assessed. Enforcement cases in South Dakota →
Permit renewals by year
An NPDES permit runs for five years. To keep discharging, a plant must apply for renewal at least 180 days before the expiry date, and the renewed permit usually arrives with tighter effluent limits, new monitoring requirements or a compliance schedule. That is why the year a permit expires is the year a plant starts budgeting for upgrades: nutrient removal, disinfection, capacity or controls.
Largest permit holders in South Dakota
| Facility | City | Avg flow (MGD) | Design (MGD) | NPDES permit | Status | Expires | Violations (3y) |
|---|---|---|---|---|---|---|---|
| Rapid City Water Reclamation Facility | Rapid City | 9.62 | 12 | SD0023574 | Administratively continued | Jun 2022 | 4 |
| Watertown, City Of | Watertown | 3.89 | — | SD0028614 | Terminated | Jun 2018 | 1 |
| Huron, City Of | Huron | 4.88 | 2.3 | SD0023434 | Effective | Jun 2027 | 21 |
| Pierre, City Of | Pierre | 1.49 | 2.21 | SD0020176 | Effective | Jun 2027 | 3 |
| Belle Fourche WTP | Belle Fourche | — | 2 | SD0021628 | Effective | Apr 2028 | — |
| Lead - Deadwood Sanitary District | Deadwood | 1.65 | 2 | SD0020796 | Administratively continued | Jun 2020 | 2 |
| Mitchell, City Of | Mitchell | — | 2 | SD0023361 | Effective | Dec 2029 | 12 |
| Vermillion, City Of | Vermillion | 1.06 | 2 | SD0020061 | Administratively continued | Sep 2017 | 2 |
| Madison-Treatment Plant | Madison | — | 1.6 | SD0020010 | Effective | Jun 2027 | 0 |
| Sturgis, City Of | Sturgis | — | 1.2 | SD0020052 | Administratively continued | Dec 2025 | 0 |
South Dakota NPDES permits: questions
NPDES permit search in other states
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed October 12, 2026.
Wastewater terms: NPDES permit · POTW · Significant industrial user · MGD · Tertiary treatment · WWTP · all terms