Passage Data · Check a report · Use it from your AI
In South Dakota: 5 plants hold a permit with a new or tighter discharge limit already written into it, taking effect between Sep 1, 2027 and Apr 1, 2029 (55 limits); 0 of them reported a median above that limit between Oct 1, 2025 and Sep 30, 2026. EPA's file of Oct 16, 2026.
By state: all · IA 204 · PA 172 · LA 165 · OH 134 · MS 68 · AR 58 · TX 57 · MI 53 · GA 52 · VA 52 · MD 48 · NJ 35 · IN 31 · SC 23 · KS 21 · MN 21 · NY 21 · MO 20 · WV 17 · OR 16 · IL 14 · FL 10 · NE 9 · OK 8 · TN 8 · CO 7 · UT 7 · NM 6 · CA 5 · SD 5 · CT 3 · ID 3 · ME 2 · WI 2 · AL 1 · DC 1 · KY 1 · MT 1 · NH 1 · PR 1 · VT 1 · WA 1
By pollutant: Nitrogen, ammonia total [as N] 4 · Selenium, total recoverable 1
| Plant | Permit | State | Type | Design flow | Parameter | New limit | Effective | Today's median | × limit |
|---|---|---|---|---|---|---|---|---|---|
| Colman, City of | SD0022551 | SD | Sewage plant | .065 MGD | Nitrogen, ammonia total [as N] | 30-day average 2.9 mg/L (Dec), tighter | Sep 1, 2027 | under 3 values | — |
| Colman, City of | SD0022551 | SD | Sewage plant | .065 MGD | Nitrogen, ammonia total [as N] | 30-day average 1.6 mg/L (Apr), tighter | Sep 1, 2027 | under 3 values | — |
| Colman, City of | SD0022551 | SD | Sewage plant | .065 MGD | Nitrogen, ammonia total [as N] | 30-day average 1.4 mg/L (May), tighter | Sep 1, 2027 | under 3 values | — |
| Colman, City of | SD0022551 | SD | Sewage plant | .065 MGD | Nitrogen, ammonia total [as N] | 30-day average 1 mg/L (Aug), tighter | Sep 1, 2027 | under 3 values | — |
| Colman, City of | SD0022551 | SD | Sewage plant | .065 MGD | Nitrogen, ammonia total [as N] | 30-day average 3.4 mg/L (Feb), tighter | Sep 1, 2027 | under 3 values | — |
| Colman, City of | SD0022551 | SD | Sewage plant | .065 MGD | Nitrogen, ammonia total [as N] | 30-day average 1.2 mg/L (Sep), tighter | Sep 1, 2027 | under 3 values | — |
| Colman, City of | SD0022551 | SD | Sewage plant | .065 MGD | Nitrogen, ammonia total [as N] | 30-day average 4 mg/L (Jan), tighter | Sep 1, 2027 | under 3 values | — |
| Colman, City of | SD0022551 | SD | Sewage plant | .065 MGD | Nitrogen, ammonia total [as N] | 30-day average 2.3 mg/L (Nov), tighter | Sep 1, 2027 | under 3 values | — |
| Colman, City of | SD0022551 | SD | Sewage plant | .065 MGD | Nitrogen, ammonia total [as N] | 30-day average 1 mg/L (Jun), tighter | Sep 1, 2027 | under 3 values | — |
| Colman, City of | SD0022551 | SD | Sewage plant | .065 MGD | Nitrogen, ammonia total [as N] | 30-day average 1.7 mg/L (Oct), tighter | Sep 1, 2027 | under 3 values | — |
| Colman, City of | SD0022551 | SD | Sewage plant | .065 MGD | Nitrogen, ammonia total [as N] | 30-day average 3.5 mg/L (Mar), tighter | Sep 1, 2027 | under 3 values | — |
| Colman, City of | SD0022551 | SD | Sewage plant | .065 MGD | Nitrogen, ammonia total [as N] | 30-day average 1 mg/L (Jul), tighter | Sep 1, 2027 | under 3 values | — |
| Colman, City of | SD0022551 | SD | Sewage plant | .065 MGD | Nitrogen, ammonia total [as N] | daily maximum 4.5 mg/L (Aug), tighter | Sep 1, 2027 | under 3 values | — |
| Colman, City of | SD0022551 | SD | Sewage plant | .065 MGD | Nitrogen, ammonia total [as N] | daily maximum 3.3 mg/L (Jun), tighter | Sep 1, 2027 | under 3 values | — |
| Colman, City of | SD0022551 | SD | Sewage plant | .065 MGD | Nitrogen, ammonia total [as N] | daily maximum 5.1 mg/L (Jul), tighter | Sep 1, 2027 | under 3 values | — |
| Platte, City of | SD0020354 | SD | Sewage plant | .16 MGD | Nitrogen, ammonia total [as N] | 30-day average 4.2 mg/L (Feb), tighter | Dec 1, 2028 | under 3 values | — |
| Platte, City of | SD0020354 | SD | Sewage plant | .16 MGD | Nitrogen, ammonia total [as N] | daily maximum 8.1 mg/L (Jan), tighter | Dec 1, 2028 | under 3 values | — |
| Viborg, City of | SD0020541 | SD | Sewage plant | .13 MGD | Nitrogen, ammonia total [as N] | 30-day average 1.5 mg/L (Oct), tighter | Dec 1, 2028 | under 3 values | — |
| Viborg, City of | SD0020541 | SD | Sewage plant | .13 MGD | Nitrogen, ammonia total [as N] | 30-day average 3.1 mg/L (Feb), tighter | Dec 1, 2028 | under 3 values | — |
| Viborg, City of | SD0020541 | SD | Sewage plant | .13 MGD | Nitrogen, ammonia total [as N] | 30-day average 2.1 mg/L (Nov), tighter | Dec 1, 2028 | under 3 values | — |
| Viborg, City of | SD0020541 | SD | Sewage plant | .13 MGD | Nitrogen, ammonia total [as N] | 30-day average 3.3 mg/L (Jan), tighter | Dec 1, 2028 | under 3 values | — |
| Viborg, City of | SD0020541 | SD | Sewage plant | .13 MGD | Nitrogen, ammonia total [as N] | 30-day average 1 mg/L (Jun), tighter | Dec 1, 2028 | under 3 values | — |
| Viborg, City of | SD0020541 | SD | Sewage plant | .13 MGD | Nitrogen, ammonia total [as N] | 30-day average 1.6 mg/L (Apr), tighter | Dec 1, 2028 | under 3 values | — |
| Viborg, City of | SD0020541 | SD | Sewage plant | .13 MGD | Nitrogen, ammonia total [as N] | 30-day average 1 mg/L (May), tighter | Dec 1, 2028 | under 3 values | — |
| Viborg, City of | SD0020541 | SD | Sewage plant | .13 MGD | Nitrogen, ammonia total [as N] | 30-day average 1 mg/L (Jul), tighter | Dec 1, 2028 | under 3 values | — |
| Viborg, City of | SD0020541 | SD | Sewage plant | .13 MGD | Nitrogen, ammonia total [as N] | 30-day average 2.5 mg/L (Dec), tighter | Dec 1, 2028 | under 3 values | — |
| Viborg, City of | SD0020541 | SD | Sewage plant | .13 MGD | Nitrogen, ammonia total [as N] | 30-day average 1 mg/L (Sep), tighter | Dec 1, 2028 | under 3 values | — |
| Viborg, City of | SD0020541 | SD | Sewage plant | .13 MGD | Nitrogen, ammonia total [as N] | 30-day average 2.4 mg/L (Mar), tighter | Dec 1, 2028 | under 3 values | — |
| Viborg, City of | SD0020541 | SD | Sewage plant | .13 MGD | Nitrogen, ammonia total [as N] | 30-day average 1 mg/L (Aug), tighter | Dec 1, 2028 | under 3 values | — |
| Viborg, City of | SD0020541 | SD | Sewage plant | .13 MGD | Nitrogen, ammonia total [as N] | daily maximum 2.6 mg/L (Jul), tighter | Dec 1, 2028 | under 3 values | — |
| Viborg, City of | SD0020541 | SD | Sewage plant | .13 MGD | Nitrogen, ammonia total [as N] | daily maximum 5 mg/L (Sep), tighter | Dec 1, 2028 | under 3 values | — |
| Mitchell, City of | SD0023361 | SD | Sewage plant, major | 2 MGD | Nitrogen, ammonia total [as N] | 30-day average 165 lb/d (Jan), tighter | Jan 1, 2029 | under 3 values | — |
| Mitchell, City of | SD0023361 | SD | Sewage plant, major | 2 MGD | Nitrogen, ammonia total [as N] | 30-day average 279 lb/d (Jan, Feb), tighter | Jan 1, 2029 | under 3 values | — |
| Mitchell, City of | SD0023361 | SD | Sewage plant, major | 2 MGD | Nitrogen, ammonia total [as N] | 30-day average 712 lb/d (Jan, Feb), tighter | Jan 1, 2029 | under 3 values | — |
| Mitchell, City of | SD0023361 | SD | Sewage plant, major | 2 MGD | Nitrogen, ammonia total [as N] | 30-day average 92 lb/d (Apr), tighter | Jan 1, 2029 | under 3 values | — |
| Mitchell, City of | SD0023361 | SD | Sewage plant, major | 2 MGD | Nitrogen, ammonia total [as N] | 30-day average 92 lb/d (Apr), tighter | Jan 1, 2029 | under 3 values | — |
| Mitchell, City of | SD0023361 | SD | Sewage plant, major | 2 MGD | Nitrogen, ammonia total [as N] | 30-day average 90 lb/d (May), tighter | Jan 1, 2029 | under 3 values | — |
| Mitchell, City of | SD0023361 | SD | Sewage plant, major | 2 MGD | Nitrogen, ammonia total [as N] | 30-day average 80 lb/d (May), tighter | Jan 1, 2029 | under 3 values | — |
| Mitchell, City of | SD0023361 | SD | Sewage plant, major | 2 MGD | Nitrogen, ammonia total [as N] | 30-day average 122 lb/d (Jul–Sep), tighter | Jan 1, 2029 | under 3 values | — |
| Mitchell, City of | SD0023361 | SD | Sewage plant, major | 2 MGD | Nitrogen, ammonia total [as N] | 30-day average 294 lb/d (Oct, Nov), tighter | Jan 1, 2029 | under 3 values | — |
| Mitchell, City of | SD0023361 | SD | Sewage plant, major | 2 MGD | Nitrogen, ammonia total [as N] | 30-day average 159 lb/d (May, Jun), tighter | Jan 1, 2029 | under 3 values | — |
| Mitchell, City of | SD0023361 | SD | Sewage plant, major | 2 MGD | Nitrogen, ammonia total [as N] | 30-day average 50 lb/d (Jul–Sep), tighter | Jan 1, 2029 | under 3 values | — |
| Mitchell, City of | SD0023361 | SD | Sewage plant, major | 2 MGD | Nitrogen, ammonia total [as N] | 30-day average 279 lb/d (Mar), tighter | Jan 1, 2029 | under 3 values | — |
| Mitchell, City of | SD0023361 | SD | Sewage plant, major | 2 MGD | Nitrogen, ammonia total [as N] | 30-day average 82 lb/d (Jun), tighter | Jan 1, 2029 | under 3 values | — |
| Mitchell, City of | SD0023361 | SD | Sewage plant, major | 2 MGD | Nitrogen, ammonia total [as N] | 30-day average 196 lb/d (Apr), tighter | Jan 1, 2029 | under 3 values | — |
| Mitchell, City of | SD0023361 | SD | Sewage plant, major | 2 MGD | Nitrogen, ammonia total [as N] | daily maximum 744 lb/d (Jan), tighter | Jan 1, 2029 | under 3 values | — |
| Mitchell, City of | SD0023361 | SD | Sewage plant, major | 2 MGD | Nitrogen, ammonia total [as N] | daily maximum 1295 lb/d (Jan, Feb), tighter | Jan 1, 2029 | under 3 values | — |
| Mitchell, City of | SD0023361 | SD | Sewage plant, major | 2 MGD | Nitrogen, ammonia total [as N] | daily maximum 448 lb/d (Apr), tighter | Jan 1, 2029 | under 3 values | — |
| Mitchell, City of | SD0023361 | SD | Sewage plant, major | 2 MGD | Nitrogen, ammonia total [as N] | daily maximum 141 lb/d (May), tighter | Jan 1, 2029 | under 3 values | — |
| Mitchell, City of | SD0023361 | SD | Sewage plant, major | 2 MGD | Nitrogen, ammonia total [as N] | daily maximum 537 lb/d (Jul–Sep), tighter | Jan 1, 2029 | under 3 values | — |
| Mitchell, City of | SD0023361 | SD | Sewage plant, major | 2 MGD | Nitrogen, ammonia total [as N] | daily maximum 207 lb/d (Jul–Sep), tighter | Jan 1, 2029 | under 3 values | — |
| Mitchell, City of | SD0023361 | SD | Sewage plant, major | 2 MGD | Nitrogen, ammonia total [as N] | daily maximum 354 lb/d (Jun), tighter | Jan 1, 2029 | under 3 values | — |
| Mitchell, City of | SD0023361 | SD | Sewage plant, major | 2 MGD | Nitrogen, ammonia total [as N] | daily maximum 986 lb/d (Apr), tighter | Jan 1, 2029 | under 3 values | — |
| South Dakota Ellsworth Development Authority (SDEDA) | SD0028611 | SD | Sewage plant, major | 3 MGD | Selenium, total recoverable | daily maximum 12.8 ug/L, new | Apr 1, 2029 | 5 ug/L (3 values, 1 below detection) | 0.391× |
| South Dakota Ellsworth Development Authority (SDEDA) | SD0028611 | SD | Sewage plant, major | 3 MGD | Selenium, total recoverable | 30-day average 5 ug/L, new | Apr 1, 2029 | under 3 values | — |
Each limit is one EPA's ICIS-NPDES file holds on the permit's current version with a begin date after today, enforceable and numeric, either on a parameter the outfall was never limited on (new) or lower than the limit in force (tighter). Today's median is the plant's own reported values for the same outfall, statistic and unit between Oct 1, 2025 and Sep 30, 2026, with how many; none is shown where most were below a detection limit. Read the permit before relying on a value.
Sell to these plants? The list for your states every week, with every plant over a limit on your pollutant, as a spreadsheet, by API and by email when a new one appears: ask for the plant list, or write to info@passage-data.com. What a seller gets.
For programs and AI agents: a state's permits with these limits as JSON at /api/v1/permits?state=SD&upcoming=true, narrowed with &facility_type=potw or &min_flow_mgd=1; the whole list at /dmr/data/upcoming.json; or add https://passage-data.com/mcp as a remote MCP server (tool list_permits). Free, no key. llms.txt
From EPA's ECHO data, not the permit document itself: your permit is the final word. All states