Recycling Treated Municipal Wastewater for Industrial Water Use

Table 4. Examples of State Water Reuse Criteria for Selected Nonpotable Applications
Appendix B
Status of Water Reuse Regulations and Guidelines
Fodder Crop Irrigation 1
Processed Food Crop Irrigation 2
Food Crop Irrigation 3
Restricted Recreational
Impoundments 4
State
Treatment
Quality Limits
Required
Treatment
Quality Limits
Required
Treatment
Quality Limits
Required
Treatment
Quality Limits
Required
No detect. fecal Secondary No detect. fecal coli/ Secondary
Arizona 1,000 fecal coli/100 ml Secondary Not covered Not covered coli/100 ml Filtration 100 ml
Filtration
2 NTU
Disinfection
Oxidation
2 NTU
Disinfection
California Not specified Oxidation Not specified Oxidation
2.2 total coli/100 ml
2 NTU
Coagulation 5
Filtration
Disinfection
2.2 total coli/100 ml
Oxidation
Disinfection
Colorado Not covered Not covered Not covered Not covered Not covered Not covered Not covered Not covered
Florida
200 fecal coli/100 ml
20 mg/L CBOD 6
20 mg/l TSS 7
Secondary
Disinfection
No detect. fecal coli/
100 ml
20 mg/L CBOD
5 mg/L TSS
Secondary
Filtration
Disinfection
Use prohibited Use prohibited
No detect. fecal coli/
100 ml
20 mg/L CBOD
5 mg/L TSS
Secondary
Filtration
Disinfection
New Mexico
(Policy)
1,000 fecal coli/100 ml
75 mg/L TSS
30 mg/L BOD 6
Not specified Not covered Not covered Use Prohibited Use Prohibited
100 fecal coli/100 ml
30 mg/L BOD
30 mg/L TSS
Not specified
Utah
200 fecal coli/100 ml
25 mg/L BOD
25 mg/L TSS
Secondary
Disinfection
No detect. fecal coli/
100 ml
10 mg/L BOD
2 NTU
Secondary
Filtration
Disinfection
No detect. fecal
coli/100 ml
10 mg/L BOD
2 NTU
Secondary
Filtration
Disinfection
200 fecal coli/100 ml
25 mg/L BOD
25 mg/L TSS
Secondary
Disinfection
200 fecal coli/100 ml
200 fecal coli/100 ml
20 fecal coli/100 ml
Texas 20 mg/L BOD
Not specified 20 mg/L BOD
Not specified Use prohibited Use prohibited 3 NTU
Not specified
15 mg/L CBOD
15 mg/L CBOD
5 mg/L BOD or CBOD
Washington 240 total coli/100 ml
Oxidation
Disinfection
240 total coli/100 ml
Oxidation
Disinfection
2.2 total coli/
100 ml
2 NTU
Oxidation
Coagulation
Filtration
Disinfection
Oxidation
2.2 total coli/100 ml
Disinfection
1
In some states more restrictive requirements apply where milking animals are allowed to graze on pasture irrigated with reclaimed water.
2
Physical or chemical processing sufficient to destroy pathogenic microorganisms. Less restrictive requirements may apply where there is no direct contact between reclaimed
water and the edible portion of the crop.
3
Food crops eaten raw where there is direct contact between reclaimed water and the edible portion of the crop.
4
Recreation is limited to fishing, boating, and other nonbody contact activities.
5
Not needed if filter effluent turbidity does not exceed 2 NTU, the turbidity of the influent to the filters is continually measured, the influent turbidity does not exceed 5 NTU for
more than 15 minutes and never exceeds 10 NTU, and there is capability to automatically activate chemical addition or divert the wastewater should the filter influent turbidity
exceed 5 NTU for more than 15 minutes.
6
CBOD – carbonaceous biochemical oxygen demand; where BOD is the same as Total BOD
7 TSS – total suspended solids
Craddock Consulting Engineers B-6
In Association with CDM & James Crook
WWReuse Tm1_Appendix B_Regulatory.doc