Methyl methanesulfonate cleanup levels by state
- CAS 66-27-3
- 2 states
CAS 66-27-3 is in the cleanup-level tables of 2 states in this handbook: Pennsylvania (METHYL METHANESULFONATE) and Texas (Methyl methanesulfonate). Each state's numbers are below as its agency prints them. The states run different programs and do not define their values the same way, so a number from one is not the same measure as a number from another. A state that lists the substance under another CAS number, or without one, is not shown here.
Pennsylvania
- PA DEP
- Act 2 Statewide Health Standards
For METHYL METHANESULFONATE, DEP's Statewide Health Standard tables print 6.6 μg/L for residential groundwater in a used aquifer with TDS up to 2500, 190 mg/kg for residential soil direct contact from 0 to 15 feet, and two residential soil to groundwater values for a used aquifer with TDS up to 2500: 0.66 mg/kg as 100 X GW MSC and 0.082 mg/kg as the generic value.
- 6.6μg/L R Table 1: Medium-Specific Concentrations (MSCs) for Organic Regulated Substances in Groundwater Used Aquifers, TDS ≤ 2500
- 190mg/kg 0-15 feet Table 3a: Medium-Specific Concentrations (MSCs) for Organic Regulated Substances in Soil: A. Direct Contact Numeric Values Residential
- 0.66mg/kg 100 X GW MSC Table 3b: Medium-Specific Concentrations (MSCs) for Organic Regulated Substances in Soil: B. Soil to Groundwater Numeric Values Used Aquifers, TDS ≤ 2500, Residential
- 0.082mg/kg Generic Value Table 3b: Medium-Specific Concentrations (MSCs) for Organic Regulated Substances in Soil: B. Soil to Groundwater Numeric Values Used Aquifers, TDS ≤ 2500, Residential
Texas
- TCEQ
- TRRP Tier 1 PCLs
- February 6, 2025
For Methyl methanesulfonate, TCEQ's Tier 1 table prints 33 mg/kg for TotSoilComb and 0.018 mg/kg for GWSoilIng (residential soil, 0.5 acre source area), and 0.0092 mg/L for GWGWIng (residential groundwater).
- 33mg/kg 3.3E+01 TotSoilComb Table 1: Tier 1 Residential Soil PCLs 0.5 acre source area
- 0.018mg/kg 1.8E-02 GWSoilIng Table 1: Tier 1 Residential Soil PCLs 0.5 acre source area
- 0.0092mg/L 9.2E-03 GWGWIng Table 3: Tier 1 Groundwater PCLs - Residential and Commercial/Industrial Residential
Each agency's own publication governs: its current table, or the published rule where the agency says so. This page is a reference copy and not a cleanup decision. Check each agency's page before relying on a value.
Source
- Pennsylvania Department of Environmental Protection, Statewide Health Standard Medium-Specific Concentrations.
- Table 1: DEP's file dated April 14, 2022, read October 5, 2026.
- Table 3a: DEP's file dated January 4, 2022, read October 5, 2026.
- Table 3b: DEP's file dated January 19, 2022, read October 5, 2026.
- Texas Commission on Environmental Quality, Texas Risk Reduction Program Tier 1 Protective Concentration Levels, last revised February 6, 2025. File read October 1, 2026.