Summary of water reuse criteria for select nonpotable applications from reuse programs from several statesa
Link to this table

Water Quality Parameter Water Quality Limit – Food Crop Irrigation Water Quality Limit – Restricted Access Irrigation Water Quality Limit – Unrestricted Access Irrigation
Total Coliform 2.2 total coliform 23 total coliform/100mL 2.2 total coliform/100mL
Fecal Coliform No Detect/100mL (some states prohibit usea) 200 fecal coliform/100mL No Detect/100mL – 20 fecal coliform/100mL
E. coli N/A 126 E. coli/100mL (only CO uses E. coli as a standard) 126 E. coli/100mL (only CO uses E. coli as a standard)
Turbidity 2 NTU N/A 2 NTU – 3 NTU
TSS N/A 20-30 mg/L 5 mg/L
BOD 10 mg/L BOD 20-30 mg/L 5-10 mg/L
CBOD N/A 15-20 mg/L 5-20 mg/L
pH N/A N/A N/A

Note: Many of these standards are based on water quality limits established for reclaimed water (treated wastewater), not stormwater specifically
a – Includes review of water reuse programs in AZ, CA, CO, FL, GA, HI, NV, NM, NC, OR, TX, UT, WA, and US EPA guidelines

This page was last edited on 16 April 2020, at 18:03.

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