Cyanide cleanup levels by state
- CAS 57-12-5
- 3 states
CAS 57-12-5 is in the cleanup-level tables of 3 states in this handbook: Florida (Cyanide, free), Pennsylvania (CYANIDE, FREE) and Texas (Cyanide). 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.
Florida
- FL DEP
- Chapter 62-777 CTLs
- February 2005
For Cyanide, free, DEP's cleanup target level tables print 200 ug/L as the groundwater criterion, 34** mg/kg for residential direct exposure to soil and 0.8 mg/kg for soil leachability based on groundwater.
- 200ug/L Groundwater Criteria Table I: Groundwater and Surface Water Cleanup Target Levels
- 34**mg/kg Direct Exposure - Residential Table II: Soil Cleanup Target Levels
- 0.8mg/kg Leachability Based on Groundwater Table II: Soil Cleanup Target Levels
Florida Department of Environmental Protection
** Direct exposure value based on acute toxicity considerations. This criterion is applicable in scenarios where children might be exposed to soils (e.g. residences, schools, playgrounds)
Pennsylvania
- PA DEP
- Act 2 Statewide Health Standards
For CYANIDE, FREE, DEP's Statewide Health Standard tables print 200 ug/L for residential groundwater in a used aquifer with TDS up to 2500, 130 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: 20 mg/kg as 100 X GW MSC and 200 mg/kg as the generic value.
- 200ug/L R Table 2: Medium-Specific Concentrations (MSCs) for Inorganic Regulated Substances in Groundwater Used Aquifers, TDS ≤ 2500
- 130mg/kg 0-15 feet Table 4a: Medium-Specific Concentrations (MSCs) for Inorganic Regulated Substances in Soil: A. Direct Contact Numeric Values Residential MSC
- 20mg/kg 100 X GW MSC Table 4b: Medium-Specific Concentrations (MSCs) for Inorganic Regulated Substances in Soil: B. Soil to Groundwater Numeric Values Used Aquifers, TDS < = 2500, R
- 200mg/kg Generic Value Table 4b: Medium-Specific Concentrations (MSCs) for Inorganic Regulated Substances in Soil: B. Soil to Groundwater Numeric Values Used Aquifers, TDS < = 2500, R
Texas
- TCEQ
- TRRP Tier 1 PCLs
- February 6, 2025
For Cyanide, TCEQ's Tier 1 table prints 45 mg/kg for TotSoilComb and 40 mg/kg for GWSoilIng (residential soil, 0.5 acre source area), and 0.2 mg/L for GWGWIng (residential groundwater).
- 45mg/kg 4.5E+01 TotSoilComb Table 1: Tier 1 Residential Soil PCLs 0.5 acre source area
- 40mg/kg 4.0E+01 GWSoilIng Table 1: Tier 1 Residential Soil PCLs 0.5 acre source area
- 0.2mg/L 2.0E-01 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
- Florida Department of Environmental Protection, Cleanup Target Levels for Chapter 62-777, F.A.C., dated February 2005. Files read October 6, 2026.
- Pennsylvania Department of Environmental Protection, Statewide Health Standard Medium-Specific Concentrations.
- Table 2: DEP's file dated November 15, 2023, read October 5, 2026.
- Table 4a: DEP's file dated November 15, 2023, read October 5, 2026.
- Table 4b: DEP's file dated November 15, 2023, 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.