Proposed-Ruless

10 CSR 23-2.020 — Certification and Registration. The department is amending section (1) and removing sections (3) and (4)

Jun 1, 2026

10 CSR 23-1.090 — Permits. The department is amending subsections (1)(A), (1)(F), and (2)(D)

Jun 1, 2026

10 CSR 23-1.010 — Definitions. The department is amending subsection (3)(G)

Jun 1, 2026

10 CSR 10-6.080 — Emission Standards for Hazardous Air Pollutants. The commission is amending subsection (3)(A). If the commission adopts this rule action, the department intends to advise the U.S. Environmental Protection Agency Proposed Rules April 15, 202

Apr 15, 2026

10 CSR 10-6.075 — Maximum Achievable Control Technology Regulations. The commission is amending subsection (3)(A) andsubsection(3)(B).Ifthecommissionadoptsthisruleaction, the department intends to advise the U.S. Environmental Protection Agency that we will

Apr 15, 2026

10 CSR 10-6.070 — New Source Performance Regulations. The commission is amending subsection (3)(A) and subsection (3) (B). If the commission adopts this rule action, the department intends to advise the U.S. Environmental Protection Agency that we will accep

Apr 15, 2026

10 CSR 23-2.010 — Fee Structure. The department is amending section (1)

Feb 17, 2026

10 CSR 20-6.015 — are required until all waste, wastewater, wastewater solids/sludges, and any solid wastes have been [disposed of] properly handled in accordance with the closure plan approved by the department under subsection

Jan 2, 2026

10 CSR 20-8.110 — (6). Pilot project installations are temporary and coordinated to ensure water quality is protected. 2. A demonstration project installation is a full-scale innovative technology process. All antidegradation, operating permit, and construct

Jan 2, 2026

10 CSR 20-6.010 — Construction and Operating Permits. The division is amending sections (1)–(13) and (15)

Jan 2, 2026

10 CSR 10-6.255 — Chemical Accident Prevention for Agricultural Anhydrous Ammonia. The commission is amending section (3). The evidence supporting the need for this proposed rulemaking is available for viewing at the Missouri Department of Natural Resources’

Dec 15, 2025

10 CSR 10-6.250 — Asbestos Projects—Certification, Accreditation and Business Exemption Requirements. The commission is amending sections (2) and (3). The evidence supporting the need for this proposed rulemaking is available for viewing at the Missouri Depa

Dec 15, 2025

10 CSR 10-6.020 — 10 CSR 10-6.020

Dec 15, 2025

10 CSR 10-6.065 — Operating Permits. The commission is amending section (2) and subsections (1)(B), (4)(B), and (5)(B). If thecommissionadoptsthisruleaction,thedepartmentintends to submit this rule amendment to the U.S. Environmental Protection Agency to rep

Dec 15, 2025

10 CSR 10-6.062 — Construction Permits By Rule. The commission is amending the purpose and subsection (3)(A). If thecommissionadoptsthisruleaction,thedepartmentintends to submit this rule amendment to the U.S. Environmental Protection Agency to replace the c

Dec 15, 2025

10 CSR 10-6.060 — Section Reference Filing Fee Processing

Dec 15, 2025

10 CSR 10-6.025 — Fees. This proposed new rule compiles all the permitting, emission, agricultural anhydrous ammonia, and asbestos fees from rules found in 10 CSR 10 Chapter 6 into a single fee rule. Compiling these fees into a single rulemaking will allow f

Dec 15, 2025

10 CSR 20-6.010 — (4), provided that the storm water does not come in contact with process waste, process wastewater, or significant materials, and the storm water is not a significant contributor of pollutants; 11. Phase II municipal separate storm sewer sy

Aug 15, 2025

10 CSR 20-6.200 — Storm Water Regulations. The department is amending sections (1)–(3) and (5)–(7)

Aug 15, 2025

10 CSR 20-6.020 — . 3. The department may establish a general permit for a category of similar facilities in accordance with 10 CSR 20- 6.010(13). 4. Noncontiguous land application sites may be included in

Aug 15, 2025

10 CSR 20-6.015 — No-Discharge [Permits] Operations and Land Application Requirements. The department is removing forms, amending the title of the rule, the purpose, and sections (1)–(3) and (8), adding new sections (4) and (5)–(7), deleting section (4), and

Aug 15, 2025

10 CSR 20-2.010 — Definitions. The department is adding new sections (8), (9), (15), (16), (18), (19), (33), (37), (41), (48), (61)–(63),

Aug 15, 2025

10 CSR 90-2.030 — Camping and Recreational Activities. The department is amending section (11) and subsection (16)(B)

Jul 1, 2025

10 CSR 10-6.140 — Restriction of Emissions Credit for Reduced Pollutant Concentrations From the Use of Dispersion Techniques. This rule implemented the provisions of federal regulations which restrict credit in the calculation of emission limitations for red

Jun 16, 2025

10 CSR 10-6.060 — . Recordkeeping shall begin on the date of the construction or modification. The exemptions shall be documented [as follows:] by maintaining records or documentation to prove that the criteria described in subsection (4)(A) and either subse

Jun 16, 2025

10 CSR 10-6.061 — Construction Permit Exemptions. If the commission adopts this rule action, the department intends to submit this rule amendment to the U.S. Environmental Protection Agency to replace the current rule that is in the Missouri State Implementa

Jun 16, 2025

10 CSR 10-6.080 — Emission Standards for Hazardous Air Pollutants. The commission proposes to amend subsection (3) (A). If the commission adopts this rule action, the department intends to advise the U.S. Environmental Protection Agency that we will accept d

Feb 3, 2025

10 CSR 10-6.075 — Maximum Achievable Control Technology Regulations. The commission proposes to amend subsection

Feb 3, 2025

10 CSR 10-6.070 — New Source Performance Regulations. The commission proposes to amend subsections (3)(A)-(B). If the commission adopts this rule action, the department intends to advise the U.S. Environmental Protection Agency that we will accept delegation

Feb 3, 2025

10 CSR 25-13.010 — Polychlorinated Biphenyls. This rule established standards for the management of waste materials or waste manufactured items containing polychlorinated biphenyls at concentrations of fifty parts per million (50 ppm) or more

Jan 2, 2025

10 CSR 25-7.270 — (2)[(A)](B)1., and 10 CSR 25-7.270. B. Reserved. [B.]C. The department shall review for completeness every permit application. Each permit application submitted by a new facility should be reviewed for completeness by the

Jan 2, 2025

10 CSR 25-8.124 — Procedures for Decision Making. The department is amending sections (1)—(4)

Jan 2, 2025

10 CSR 25-6.263 — Standards for Transporters of Hazardous Waste. The department is amending sections (1) and (2)

Jan 2, 2025

10 CSR 25-12.020 — Hazardous Waste Compliance Inspection Fees. The commission is amending the purpose and sections

Aug 15, 2024

10 CSR 25-12.010 — Fees and Taxes. The commission is adding new sections (1)–(4), renumbering as necessary, and amending the purpose and remaining sections

Aug 15, 2024

10 CSR 25-11.279 — Recycled Used Oil Management Standards. The commission is amending sections (1)–(3)

Aug 15, 2024

10 CSR 25-7.268 — Land Disposal Restrictions. The commission is amending the chapter title and sections (1) and (2)

Aug 15, 2024

10 CSR 25-7.266 — Standards for the Management of Specific Hazardous Wastes and Specific Types of Hazardous Waste Management Facilities. The commission is amending the chapter title and sections (1) and (2)

Aug 15, 2024

10 CSR 25-7.270 — until the final administrative disposition of the permit application is made or until interim status is terminated pursuant to 10 CSR 25-7.270. The owner or operator of a facility or unit operating under state interim status shall comply wi

Aug 15, 2024

10 CSR 25-7.265 — Interim Status Standards for Owners and Operators of Hazardous Waste Treatment, Storage, and Disposal Facilities. The commission is amending the chapter title and sections (1)—(3)

Aug 15, 2024

10 CSR 25-7.264 — Standards for Owners and Operators of Hazardous Waste Treatment, Storage, and Disposal Facilities. The commission is amending the chapter title and sections (1)–(3)

Aug 15, 2024

10 CSR 25-6.263 — shall register and is subject to applicable rules under 10 CSR 25-3.260–10 CSR 25-9.020 and 10 CSR 25-12.010; and B. [Conditionally exempt] Very small quantity generators may choose to register and obtain Environmental

Aug 15, 2024

10 CSR 25-5.262 — Standards Applicable to Generators of Hazardous Waste. The commission is amending sections (1) and (2)

Aug 15, 2024

10 CSR 25-4.261 — Methods for Identifying Hazardous Waste. The commission is amending the purpose and sections (1) and

Aug 15, 2024

10 CSR 25-3.260 — Definitions, Modifications to Incorporations, and Confidential Business Information. The commission is amending sections (1)–(3)

Aug 15, 2024

10 CSR 20-8.200 — Wastewater Treatment Lagoons, [and] Wastewater Irrigation Alternatives, and Earthen Basins. The department is amending the chapter and rule titles, sections (1), (3), (4), and (6), adding new section (2), and renumbering as necessary

Jul 15, 2024

10 CSR 20-8.130 — Pumping Stations. The department is adding new section (2), amending section (7), and renumbering as necessary

Jul 15, 2024

10 CSR 20-6.030 — Disposal of Wastewater in Residential Housing Developments. The department is amending the

Jul 15, 2024

10 CSR 10-6.255 — Chemical Accident Prevention for Agricultural Anhydrous Ammonia. The Missouri Legislature passedHouseBill3in2022,whichauthorizestheAirConservation Commission to develop regulations necessary to implement and enforce the risk management plan

Jul 15, 2024

10 CSR 10-6.250 — Asbestos Projects—Certification, Accreditation and Business Exemption Requirements. The commission is amending sections (2)–(3)

Jul 15, 2024