Summary of water reuse criteria for irrigation of parks, playgrounds, schoolyards, and similar areas from reuse programs from several states

Summary of water reuse criteria for irrigation of parks, playgrounds, schoolyards, and similar areas from reuse programs from several states^a
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}