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Water Uses
The highest treatment for the highest use

Allowed in California

This summary1 was prepared by the WateReuse Association, from the September 1998 draft of proposed Title-22 revisions and supersedes previous versions. Recycled water produced by South Bay Water Recycling meets disinfected tertiary treatment levels highlighted in the tables below.

Irrigation

  Treatment Levels 

 





Disinfected Tertiary Recycled Water Disinfected Secondary-2.2 Recycled Water

Disinfected Secondary-23 Recycled Water

Undisinfected Secondary Recycled Water

Food crops where recycled water contacts the edible portion of the crop, including all root crops Allowed Not Allowed  Not Allowed  Not Allowed
Parks and playgrounds Allowed Not Allowed  Not Allowed  Not Allowed
School yards Allowed  Not Allowed Not Allowed  Not Allowed 
Residential landscaping Allowed  Not Allowed Not Allowed  Not Allowed 
Unrestricted access golf courses Allowed  Not Allowed Not Allowed  Not Allowed 
Any other irrigation uses not prohibited by other provisions of the California Code of Regulations Allowed  Not Allowed Not Allowed Not Allowed
Food crops where edible portion is produced above ground and not contacted by recycled water Allowed  Allowed Allowed Not Allowed
Cemeteries Allowed  Allowed  Allowed  Not Allowed 
Freeway landscaping Allowed  Allowed  Allowed  Not Allowed 
Restricted access golf courses Allowed  Allowed  Allowed  Not Allowed 
Ornamental nursery stock and sod farms Allowed  Allowed Allowed  Not Allowed 
Pasture for milk animals Allowed Allowed  Allowed  Not Allowed 
Nonedible vegetation with access control to prevent use as a park, playground or school yard Allowed  Allowed  Allowed  Allowed 
Orchards with no contact between edible portion and recycled water Allowed Allowed Allowed Allowed
Vineyards with no contact between edible portion and recycled water Allowed Allowed  Allowed Allowed
Non food-bearing trees, including Christmas trees not irrigated less than 14 days before harvest Allowed Allowed Allowed Allowed
Fodder crops (e.g. alfalfa) and fiber crops (e.g. cotton) Allowed Allowed Allowed Allowed 
Seed crops not eaten by humans Allowed Allowed Allowed Allowed
Food crops that undergo commercial pathogen-destroying processing before consumption by humans Allowed Allowed Allowed Allowed
Ornamental nursery stock, sod farms not irrigated less than 14 days before harvest Allowed  Allowed Allowed Allowed


Supply for Impoundment
  Treatment Levels 

Disinfected Tertiary Recycled Water

Disinfected Secondary-2.2 Recycled Water

Disinfected Secondary-23 Recycled Water

Undisinfected Secondary Recycled Water

Non-restricted recreational impoundments, with supplemental monitoring for pathogenic organisms Allowed2 Not Allowed  Not Allowed  Not Allowed
Restricted recreational impoundments and publicly accessible fish hatcheries Allowed Allowed Not Allowed  Not Allowed
Landscape impoundments without decorative fountains Allowed  Allowed Allowed Not Allowed 

Supply for Cooling or Air Conditioning
Treatment Levels 

 

Disinfected Tertiary Recycled Water

Disinfected Secondary-2.2 Recycled Water

Disinfected Secondary-23 Recycled Water

Undisinfected Secondary Recycled Water

Industrial or commercial cooling or air conditioning involving cooling tower, evaporative condenser, or spraying that creates a mist Allowed3 Not Allowed  Not Allowed  Not Allowed
Industrial or commercial cooling or air conditioning involving cooling tower, evaporative condenser, or spraying that creates a mist Allowed Allowed Allowed  Not Allowed

Other Uses
  Treatment Levels 

 

Disinfected Tertiary Recycled Water

Disinfected Secondary-2.2 Recycled Water

Disinfected Secondary-23 Recycled Water

Undisinfected Secondary Recycled Water

Groundwater recharge Allowed under special case-by-case permits by RWQCBs4
Flushing toilets and urinals  Allowed  Not Allowed Not Allowed  Not Allowed
Priming drain traps Allowed  Not Allowed Not Allowed  Not Allowed 
Industrial process water that may contact workers Allowed  Not Allowed  Not Allowed Not Allowed
Structural fire fighting Allowed Not Allowed Not Allowed Not Allowed
Decorative fountains Allowed  Not Allowed Not Allowed Not Allowed
Commercial laundries Allowed Not Allowed Not Allowed Not Allowed
Consolidation of backfill material around potable water pipelines Allowed Not Allowed Not Allowed Not Allowed
Artificial snow making for commercial outdoor uses Allowed Not Allowed Not Allowed Not Allowed
Commercial car washes Allowed Not Allowed Not Allowed Not Allowed
Industrial boiler feed Allowed Allowed Allowed Not Allowed
Nonstructural fire fighting Allowed Allowed Allowed Not Allowed
Backfill consolidation around nonpotable piping Allowed Allowed Allowed Not Allowed
Soil compaction Allowed Allowed Allowed Not Allowed
Mixing concrete Allowed Allowed Allowed Not Allowed
Dust control on roads and streets Allowed Allowed Allowed Not Allowed
Cleaning roads, sidewalks and outdoor work areas Allowed Allowed Allowed Not Allowed
Flushing sanitary sewers Allowed Allowed Allowed Allowed

1 Refer to the full text of the latest version of Title-22: California Water Recycling Criteria
2 With “conventional tertiary treatment.” Additional monitoring for two years or more is necessary with direct filtration. 
3 Drift Eliminators and/or biocides are required if public or employees can be exposed to mist. 
4 Refer to Groundwater Recharge Guidelines, State Water Resources Control Board - Division of Drinking Water.