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Plants facing new discharge limits — by state and pollutant

In Missouri: 20 plants hold a permit with a new or tighter discharge limit already written into it, taking effect between Feb 1, 2027 and Jul 30, 2029 (105 limits); 2 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: E. coli 6 · Nitrogen, ammonia total [as N] 5 · Copper, total recoverable 3 · Chlorine, total residual 2 · Cyanide, free [amenable to chlorination] 2 · Cyanide, total [as CN] 2 · Chloride 1 · Nitrogen, total [as N] 1 · Selenium, total recoverable 1 · Temperature, water deg. fahrenheit 1 · Toxicity [acute], Ceriodaphnia dubia 1 · Toxicity [acute], Pimephales promelas [Fathead Minnow] 1 · Toxicity [chronic], Ceriodaphnia dubia 1 · Toxicity [chronic], Pimephales promelas [Fathead Minnow] 1 · Zinc, total recoverable 1

PlantPermitStateTypeDesign flowParameterNew limitEffectiveToday's median× limit
City of SteeleMO0057444MOSewage plant—Nitrogen, ammonia total [as N]monthly average 3.9 mg/L (Jan, Feb, Mar, Nov), newFeb 1, 20279.585 mg/L (4 values)2.46×
GENERAL MOTORS LLCMO0100153MOIndustrial—Chlorine, total residualdaily maximum 19 ug/L, newApr 1, 202990 ug/L (5 values)4.74×
City of SteeleMO0057444MOSewage plant—Nitrogen, ammonia total [as N]daily maximum 17 mg/L (Jan, Feb, Mar, Nov), newFeb 1, 20279.585 mg/L (4 values)0.564×
City of SteeleMO0057444MOSewage plant—E. coli7-day geometric mean 1030 #/100mL (Apr–Oct), newFeb 1, 2027under 3 values—
City of SteeleMO0057444MOSewage plant—E. colimonthly average 206 #/100mL (Apr–Oct), newFeb 1, 2027under 3 values—
City of SteeleMO0057444MOSewage plant—Nitrogen, ammonia total [as N]daily maximum 23 mg/L (May), newFeb 1, 2027under 3 values—
City of SteeleMO0057444MOSewage plant—Nitrogen, ammonia total [as N]daily maximum 14.4 mg/L (Jul), newFeb 1, 2027under 3 values—
City of SteeleMO0057444MOSewage plant—Nitrogen, ammonia total [as N]daily maximum 12.1 mg/L (Aug), newFeb 1, 2027under 3 values—
City of SteeleMO0057444MOSewage plant—Nitrogen, ammonia total [as N]daily maximum 10.1 mg/L (Oct), newFeb 1, 2027under 3 values—
City of SteeleMO0057444MOSewage plant—Nitrogen, ammonia total [as N]daily maximum 14.4 mg/L (Apr), newFeb 1, 2027under 3 values—
City of SteeleMO0057444MOSewage plant—Nitrogen, ammonia total [as N]daily maximum 14.4 mg/L (Dec), newFeb 1, 2027under 3 values—
City of SteeleMO0057444MOSewage plant—Nitrogen, ammonia total [as N]daily maximum 14.4 mg/L (Jun, Sep), newFeb 1, 2027under 3 values—
City of SteeleMO0057444MOSewage plant—Nitrogen, ammonia total [as N]monthly average 2.9 mg/L (May), newFeb 1, 2027under 3 values—
City of SteeleMO0057444MOSewage plant—Nitrogen, ammonia total [as N]monthly average 1.4 mg/L (Jul), newFeb 1, 2027under 3 values—
City of SteeleMO0057444MOSewage plant—Nitrogen, ammonia total [as N]monthly average 1.5 mg/L (Aug), newFeb 1, 2027under 3 values—
City of SteeleMO0057444MOSewage plant—Nitrogen, ammonia total [as N]monthly average 2 mg/L (Oct), newFeb 1, 2027under 3 values—
City of SteeleMO0057444MOSewage plant—Nitrogen, ammonia total [as N]monthly average 2.8 mg/L (Apr), newFeb 1, 2027under 3 values—
City of SteeleMO0057444MOSewage plant—Nitrogen, ammonia total [as N]monthly average 3.5 mg/L (Dec), newFeb 1, 2027under 3 values—
City of SteeleMO0057444MOSewage plant—Nitrogen, ammonia total [as N]monthly average 1.7 mg/L (Jun, Sep), newFeb 1, 2027under 3 values—
LIBERTY BAPTIST CHURCH OF COLUMBIA,MO0129003MOIndustrial—E. coli30-day geometric mean 206 #/100mL (Apr–Dec), newFeb 1, 2027under 3 values—
LIBERTY BAPTIST CHURCH OF COLUMBIA,MO0129003MOIndustrial—E. colidaily maximum 1030 #/100mL (Apr–Dec), newFeb 1, 2027under 3 values—
LIBERTY BAPTIST CHURCH OF COLUMBIA,MO0129003MOIndustrial—Nitrogen, ammonia total [as N]daily maximum 12.1 mg/L (Apr–Jun), newFeb 1, 2027under 3 values—
LIBERTY BAPTIST CHURCH OF COLUMBIA,MO0129003MOIndustrial—Nitrogen, ammonia total [as N]daily maximum 12.1 mg/L (Jul–Sep), newFeb 1, 2027under 3 values—
LIBERTY BAPTIST CHURCH OF COLUMBIA,MO0129003MOIndustrial—Nitrogen, ammonia total [as N]daily maximum 12.1 mg/L (Oct–Dec), newFeb 1, 2027under 3 values—
LIBERTY BAPTIST CHURCH OF COLUMBIA,MO0129003MOIndustrial—Nitrogen, ammonia total [as N]daily maximum 10.1 mg/L (Jan–Mar), newFeb 1, 2027under 3 values—
LIBERTY BAPTIST CHURCH OF COLUMBIA,MO0129003MOIndustrial—Nitrogen, ammonia total [as N]monthly average 1.8 mg/L (Apr–Jun), newFeb 1, 2027under 3 values—
LIBERTY BAPTIST CHURCH OF COLUMBIA,MO0129003MOIndustrial—Nitrogen, ammonia total [as N]monthly average 1.3 mg/L (Jul–Sep), newFeb 1, 2027under 3 values—
LIBERTY BAPTIST CHURCH OF COLUMBIA,MO0129003MOIndustrial—Nitrogen, ammonia total [as N]monthly average 3.1 mg/L (Oct–Dec), newFeb 1, 2027under 3 values—
LIBERTY BAPTIST CHURCH OF COLUMBIA,MO0129003MOIndustrial—Nitrogen, ammonia total [as N]monthly average 2.7 mg/L (Jan–Mar), newFeb 1, 2027under 3 values—
Evergy, INC.MO0082996MOIndustrial, major—Temperature, water deg. fahrenheitdaily maximum 90 deg F, newApr 1, 202766.18 deg F (11 values)0.735×
City of ParnellMO0125636MOSewage plant—E. coli30-day geometric mean 206 #/100mL (Apr–Dec), newApr 1, 2027under 3 values—
City of ParnellMO0125636MOSewage plant—E. coli7-day geometric mean 1030 #/100mL (Apr–Dec), newApr 1, 2027under 3 values—
John & Lisa PageMO0124494MOIndustrial—E. coli30-day geometric mean 206 #/100mL (Apr–Dec), newApr 1, 2027under 3 values—
John & Lisa PageMO0124494MOIndustrial—E. colidaily maximum 1030 #/100mL (Apr–Dec), newApr 1, 2027under 3 values—
John & Lisa PageMO0124494MOIndustrial—Nitrogen, ammonia total [as N]daily maximum 12.1 mg/L (Apr–Jun), newApr 1, 2027under 3 values—
John & Lisa PageMO0124494MOIndustrial—Nitrogen, ammonia total [as N]daily maximum 12.1 mg/L (Jul–Sep), newApr 1, 2027under 3 values—
John & Lisa PageMO0124494MOIndustrial—Nitrogen, ammonia total [as N]daily maximum 10.1 mg/L (Jan–Mar), newApr 1, 2027under 3 values—
John & Lisa PageMO0124494MOIndustrial—Nitrogen, ammonia total [as N]daily maximum 12.1 mg/L (Oct–Dec), newApr 1, 2027under 3 values—
John & Lisa PageMO0124494MOIndustrial—Nitrogen, ammonia total [as N]monthly average 1.8 mg/L (Apr–Jun), newApr 1, 2027under 3 values—
John & Lisa PageMO0124494MOIndustrial—Nitrogen, ammonia total [as N]monthly average 1.3 mg/L (Jul–Sep), newApr 1, 2027under 3 values—
John & Lisa PageMO0124494MOIndustrial—Nitrogen, ammonia total [as N]monthly average 2.7 mg/L (Jan–Mar), newApr 1, 2027under 3 values—
John & Lisa PageMO0124494MOIndustrial—Nitrogen, ammonia total [as N]monthly average 3.1 mg/L (Oct–Dec), newApr 1, 2027under 3 values—
Mid-Missouri Energy, LLCMO0131008MOIndustrial—Copper, total recoverabledaily maximum 26.9 ug/L, newApr 1, 20272.5 ug/L (11 values, 9 below detection)—
Mid-Missouri Energy, LLCMO0131008MOIndustrial—Copper, total recoverablemonthly average 13.4 ug/L, newApr 1, 20272.5 ug/L (11 values, 9 below detection)—
Mid-Missouri Energy, LLCMO0131008MOIndustrial—Toxicity [chronic], Ceriodaphnia dubiavalue 1.1 toxic, newApr 1, 2027under 3 values—
Mid-Missouri Energy, LLCMO0131008MOIndustrial—Toxicity [chronic], Pimephales promelas [Fathead Minnow]value 1.1 toxic, newApr 1, 2027under 3 values—
Sewage Treatment TrustMO0088200MOIndustrial—Nitrogen, ammonia total [as N]daily maximum 8.4 mg/L (Sep), newApr 1, 2027under 3 values—
Sewage Treatment TrustMO0088200MOIndustrial—Nitrogen, ammonia total [as N]daily maximum 8.4 mg/L (Jul, Aug), newApr 1, 2027under 3 values—
Sewage Treatment TrustMO0088200MOIndustrial—Nitrogen, ammonia total [as N]daily maximum 10.1 mg/L (Jun), newApr 1, 2027under 3 values—
Sewage Treatment TrustMO0088200MOIndustrial—Nitrogen, ammonia total [as N]daily maximum 8.4 mg/L (Nov), newApr 1, 2027under 3 values—
Sewage Treatment TrustMO0088200MOIndustrial—Nitrogen, ammonia total [as N]daily maximum 12.1 mg/L (May), newApr 1, 2027under 3 values—
Sewage Treatment TrustMO0088200MOIndustrial—Nitrogen, ammonia total [as N]daily maximum 8.4 mg/L (Oct), newApr 1, 2027under 3 values—
Sewage Treatment TrustMO0088200MOIndustrial—Nitrogen, ammonia total [as N]daily maximum 10.1 mg/L (Mar, Dec), newApr 1, 2027under 3 values—
Sewage Treatment TrustMO0088200MOIndustrial—Nitrogen, ammonia total [as N]daily maximum 8.4 mg/L (Apr), newApr 1, 2027under 3 values—
Sewage Treatment TrustMO0088200MOIndustrial—Nitrogen, ammonia total [as N]daily maximum 12.1 mg/L (Jan, Feb), newApr 1, 2027under 3 values—
Sewage Treatment TrustMO0088200MOIndustrial—Nitrogen, ammonia total [as N]monthly average 1.2 mg/L (Sep), newApr 1, 2027under 3 values—
Sewage Treatment TrustMO0088200MOIndustrial—Nitrogen, ammonia total [as N]monthly average 0.9 mg/L (Jul, Aug), newApr 1, 2027under 3 values—
Sewage Treatment TrustMO0088200MOIndustrial—Nitrogen, ammonia total [as N]monthly average 1.3 mg/L (Jun), newApr 1, 2027under 3 values—
Sewage Treatment TrustMO0088200MOIndustrial—Nitrogen, ammonia total [as N]monthly average 2.4 mg/L (Nov), newApr 1, 2027under 3 values—
Sewage Treatment TrustMO0088200MOIndustrial—Nitrogen, ammonia total [as N]monthly average 2.1 mg/L (May), newApr 1, 2027under 3 values—
Sewage Treatment TrustMO0088200MOIndustrial—Nitrogen, ammonia total [as N]monthly average 1.8 mg/L (Oct), newApr 1, 2027under 3 values—
Sewage Treatment TrustMO0088200MOIndustrial—Nitrogen, ammonia total [as N]monthly average 2.7 mg/L (Mar, Dec), newApr 1, 2027under 3 values—
Sewage Treatment TrustMO0088200MOIndustrial—Nitrogen, ammonia total [as N]monthly average 2.1 mg/L (Apr), newApr 1, 2027under 3 values—
Sewage Treatment TrustMO0088200MOIndustrial—Nitrogen, ammonia total [as N]monthly average 3.1 mg/L (Jan, Feb), newApr 1, 2027under 3 values—
City of BloomfieldMO0050326MOSewage plant—Cyanide, free [amenable to chlorination]daily maximum 9.2 ug/L, newJul 1, 20271.5 ug/L (11 values, 11 below detection)—
City of BloomfieldMO0050326MOSewage plant—Cyanide, free [amenable to chlorination]monthly average 3 ug/L, newJul 1, 20271.5 ug/L (11 values, 11 below detection)—
Missouri Mining Investments, LLCMO0098752MOIndustrial, major—Cyanide, total [as CN]daily maximum 8.5 ug/L, newJul 1, 2027under 3 values—
Missouri Mining Investments, LLCMO0098752MOIndustrial, major—Cyanide, total [as CN]monthly average 4.3 ug/L, newJul 1, 2027under 3 values—
Poet Biorefining - Laddonia, LLCMO0132489MOIndustrial, major—Chlorine, total residualdaily maximum 18.1 ug/L, newSep 1, 2027under 3 values—
Poet Biorefining - Laddonia, LLCMO0132489MOIndustrial, major—Chlorine, total residualmonthly average 9 ug/L, newSep 1, 2027under 3 values—
American Water Military Services, LLCMO0029742MOFederal, major—Copper, total recoverablemonthly average 11.3 ug/L, newOct 1, 20273.1 ug/L (11 values, 2 below detection)0.274×
American Water Military Services, LLCMO0029742MOFederal, major—Copper, total recoverabledaily maximum 22 ug/L, newOct 1, 20273.1 ug/L (11 values, 2 below detection)0.141×
American Water Military Services, LLCMO0029742MOFederal, major—Cyanide, free [amenable to chlorination]daily maximum 7.4 ug/L, newOct 1, 20275 ug/L (11 values, 10 below detection)—
American Water Military Services, LLCMO0029742MOFederal, major—Cyanide, free [amenable to chlorination]monthly average 4.6 ug/L, newOct 1, 20275 ug/L (11 values, 10 below detection)—
City of KirksvilleMO0049506MOSewage plant, major—Nitrogen, total [as N]annual total 170652 lb/yr, newNov 1, 2027under 3 values—
City of BosworthMO0135607MOSewage plant—E. coli30-day geometric mean 206 #/100mL (Apr–Dec), newApr 1, 2028under 3 values—
City of BosworthMO0135607MOSewage plant—E. coli7-day geometric mean 1030 #/100mL (Apr–Dec), newApr 1, 2028under 3 values—
City of ClarenceMO0041076MOSewage plant—E. coli30-day geometric mean 206 #/100mL (Apr–Oct), newJul 1, 2028under 3 values—
City of ClarenceMO0041076MOSewage plant—E. coli7-day geometric mean 1030 #/100mL (Apr–Oct), newJul 1, 2028under 3 values—
City of ClarenceMO0041076MOSewage plant—E. coli30-day geometric mean 206 #/100mL (Apr–Oct), newJul 1, 2028under 3 values—
City of ClarenceMO0041076MOSewage plant—E. coli7-day geometric mean 1030 #/100mL (Apr–Oct), newJul 1, 2028under 3 values—
City of ClarenceMO0041076MOSewage plant—E. coli30-day geometric mean 206 #/100mL (Apr–Oct), newJul 1, 2028under 3 values—
City of ClarenceMO0041076MOSewage plant—E. coli7-day geometric mean 1030 #/100mL (Apr–Oct), newJul 1, 2028under 3 values—
City of SteelvilleMO0095567MOSewage plant—Zinc, total recoverabledaily maximum 225.8 ug/L, newAug 1, 2028under 3 values—
City of SteelvilleMO0095567MOSewage plant—Zinc, total recoverablemonthly average 101.1 ug/L, newAug 1, 2028under 3 values—
Vicinity Energy Kansas City, Inc.MO0004847MOIndustrial, major—Toxicity [acute], Ceriodaphnia dubiadaily maximum 1.2 toxic, newNov 1, 2028under 3 values—
Vicinity Energy Kansas City, Inc.MO0004847MOIndustrial, major—Toxicity [acute], Pimephales promelas [Fathead Minnow]daily maximum 1.2 toxic, newNov 1, 2028under 3 values—
Associated Electric Cooperative, Inc.MO0121827MOIndustrial, major—Chloridemonthly average 1565 mg/L, newJan 1, 2029500.5 mg/L (12 values)0.32×
Associated Electric Cooperative, Inc.MO0121827MOIndustrial, major—Chloridemonthly average 1565 mg/L, newJan 1, 2029489.5 mg/L (12 values)0.313×
Associated Electric Cooperative, Inc.MO0121827MOIndustrial, major—Chloridedaily maximum 3130 mg/L, newJan 1, 2029500.5 mg/L (12 values)0.16×
Associated Electric Cooperative, Inc.MO0121827MOIndustrial, major—Chloridedaily maximum 3130 mg/L, newJan 1, 2029489.5 mg/L (12 values)0.156×
Associated Electric Cooperative, Inc.MO0121827MOIndustrial, major—Nitrogen, ammonia total [as N]daily maximum 2.25 mg/L (Apr–Sep), newJan 1, 20290.1 mg/L (6 values, 4 below detection)—
Associated Electric Cooperative, Inc.MO0121827MOIndustrial, major—Nitrogen, ammonia total [as N]daily maximum 3.75 mg/L (Jan, Feb, Mar, Oct, Nov, Dec), newJan 1, 20290.1 mg/L (6 values, 5 below detection)—
Associated Electric Cooperative, Inc.MO0121827MOIndustrial, major—Nitrogen, ammonia total [as N]monthly average 1.5 mg/L (Apr–Sep), newJan 1, 20290.12 mg/L (6 values, 4 below detection)—
Associated Electric Cooperative, Inc.MO0121827MOIndustrial, major—Nitrogen, ammonia total [as N]monthly average 2.5 mg/L (Jan, Feb, Mar, Oct, Nov, Dec), newJan 1, 20290.1 mg/L (6 values, 5 below detection)—
Associated Electric Cooperative, Inc.MO0121827MOIndustrial, major—Nitrogen, ammonia total [as N]daily maximum 3.75 mg/L (Jan, Feb, Mar, Oct, Nov, Dec), newJan 1, 20290.1 mg/L (6 values, 4 below detection)—
Associated Electric Cooperative, Inc.MO0121827MOIndustrial, major—Nitrogen, ammonia total [as N]daily maximum 2.25 mg/L (Apr–Sep), newJan 1, 20290.105 mg/L (6 values, 3 below detection)—
Associated Electric Cooperative, Inc.MO0121827MOIndustrial, major—Nitrogen, ammonia total [as N]monthly average 2.5 mg/L (Jan, Feb, Mar, Oct, Nov, Dec), newJan 1, 20290.1 mg/L (6 values, 3 below detection)—
Associated Electric Cooperative, Inc.MO0121827MOIndustrial, major—Nitrogen, ammonia total [as N]monthly average 1.5 mg/L (Apr–Sep), newJan 1, 20290.105 mg/L (6 values, 3 below detection)—
DYNO NOBEL INC.MO0002402MOIndustrial, major—Cyanide, total [as CN]daily maximum 43 ug/L, newApr 1, 20295 ug/L (5 values, 5 below detection)—
DYNO NOBEL INC.MO0002402MOIndustrial, major—Cyanide, total [as CN]monthly average 21.4 ug/L, newApr 1, 20295 ug/L (5 values, 5 below detection)—
City of PevelyMO0040142MOSewage plant, major—Selenium, total recoverablemonthly average 3.2 ug/L, newJul 30, 20290.04 ug/L (11 values)0.0125×
City of PevelyMO0040142MOSewage plant, major—Selenium, total recoverabledaily maximum 9.2 ug/L, newJul 30, 20290.04 ug/L (11 values)0.00435×
City of PevelyMO0040142MOSewage plant, major—Copper, total recoverablemonthly average 18.7 ug/L, newJul 30, 20290.005 ug/L (11 values)0.000267×
City of PevelyMO0040142MOSewage plant, major—Copper, total recoverabledaily maximum 38.2 ug/L, newJul 30, 20290.005 ug/L (11 values)0.000131×

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=MO&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