PERCHLORATE cleanup levels in Pennsylvania
- PA DEP
- Act 2 Statewide Health Standards
- CAS 7790-98-9
For PERCHLORATE, DEP's Statewide Health Standard tables print 15 ug/L for residential groundwater in a used aquifer with TDS up to 2500, 150 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: 1.5 mg/kg as 100 X GW MSC and 0.17 mg/kg as the generic value.
- 15ug/L R Table 2: Medium-Specific Concentrations (MSCs) for Inorganic Regulated Substances in Groundwater Used Aquifers, TDS ≤ 2500
- 150mg/kg 0-15 feet Table 4a: Medium-Specific Concentrations (MSCs) for Inorganic Regulated Substances in Soil: A. Direct Contact Numeric Values Residential MSC
- 1.5mg/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
- 0.17mg/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
These are the Pennsylvania Department of Environmental Protection's published values for PERCHLORATE, from its Statewide Health Standard tables. DEP's page says the tables present the standards published November 20, 2021. Each value is shown as the agency prints it, with the same number written out beside it where that reads differently.
Pennsylvania: Statewide Health Standard Medium-Specific Concentrations
Table 2: Medium-Specific Concentrations (MSCs) for Inorganic Regulated Substances in Groundwater
DEP's file dated November 15, 2023.
| Column | Value | Code |
|---|---|---|
| R (ug/L) | 15 | H |
| NR (ug/L) | 15 | H |
| Column | Value | Written out | Code |
|---|---|---|---|
| R (ug/L) | 1500 | 1,500 | H |
| NR (ug/L) | 1500 | 1,500 | H |
| Column | Value | Written out | Code |
|---|---|---|---|
| R (ug/L) | 15000 | 15,000 | H |
| NR (ug/L) | 15000 | 15,000 | H |
Footnotes to Table 2, as the agency prints them
All concentrations in ug/L (except asbestos)
M = Maximum Contaminant Level
H = Lifetime Health Advisory Level
SMCL = Secondary Maximum Contaminant Level
G = Ingestion
N = Inhalation
Table 4a: Medium-Specific Concentrations (MSCs) for Inorganic Regulated Substances in Soil: A. Direct Contact Numeric Values
DEP's file dated November 15, 2023.
| Column | Value | Code |
|---|---|---|
| 0-15 feet (mg/kg) | 150 | G |
| Column | Value | Written out | Code |
|---|---|---|---|
| Surface Soil, 0-2 feet (mg/kg) | 2200 | 2,200 | G |
| Subsurface Soil, 2-15 feet (mg/kg) | 190000 | 190,000 | C |
Footnotes to Table 4a, as the agency prints them
All concentrations in mg/kg
G - Ingestion
N - Inhalation
C - Cap
U - UBK Model
S - SEGH Model
Table 4b: Medium-Specific Concentrations (MSCs) for Inorganic Regulated Substances in Soil: B. Soil to Groundwater Numeric Values1
DEP's file dated November 15, 2023.
| Column | Value |
|---|---|
| 100 X GW MSC (mg/kg) | 1.5 |
| Generic Value (mg/kg) | 0.17 |
| Column | Value |
|---|---|
| 100 X GW MSC (mg/kg) | 1.5 |
| Generic Value (mg/kg) | 0.17 |
| Column | Value |
|---|---|
| 100 X GW MSC (mg/kg) | 150 |
| Generic Value (mg/kg) | 17 |
| Column | Value |
|---|---|
| 100 X GW MSC (mg/kg) | 150 |
| Generic Value (mg/kg) | 17 |
| Column | Value | Written out |
|---|---|---|
| 100 X GW MSC (mg/kg) | 1500 | 1,500 |
| Generic Value (mg/kg) | 170 |
| Column | Value | Written out |
|---|---|---|
| 100 X GW MSC (mg/kg) | 1500 | 1,500 |
| Generic Value (mg/kg) | 170 |
| Column | Value |
|---|---|
| Soil Buffer Distance (feet) | NA |
Footnotes to Table 4b, as the agency prints them
1 For other options see Section 250.308
All concentrations in mg/kg
R - Residential
NR - Non-Residential
NA - Not Applicable
The agency's current table governs. This page is a reference copy and not a cleanup decision. Check the agency's page for a newer table before relying on a value.
Source
- 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.