Summary of water reuse criteria for irrigation of parks, playgrounds, schoolyards, and similar areas from reuse programs from several statesa
Link to this table

Water Quality Parameter Water Quality Limits (Range based on information for all states included in table) State of California Requirements State of Minnesota – Limits Used by DLIb
Total Coliform 2.2 total coliform/100mL 2.2 total coliform/100mL N/A
Fecal Coliform No Detect/100mL – 100 fecal coliform/100mL (2.2 fecal coliform/100mL most common) N/A 100 fecal coliform/100mL
E. coli 126 E. coli/100mL (only CO uses E. coli as a standard) N/A N/A
Turbidity 2 NTU – 3 NTU 2 NTU N/A
TSS 5 mg/L – 30 mg/L (5 mg/L most common) N/A 5 mg/L
BOD 5 mg/L – 30 mg/L (10 mg/L most common) N/A N/A
pH 6-9 N/A N/A
NH3 4 mg/L (only NC has NH3 as a standard) N/A N/A
Cl2 residual 0.5-1.0 mg/L N/A N/A

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
b – Per 11/28/2012 conversation with Cathy Tran, DLI; General guidance

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

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