Idaho Administrative Code › Title IDAPA 58 - Environmental Quality, Department of › Rule 58.01.17 - RECYCLED WATER RULES › Section 58.01.17.602 - MUNICIPAL RECYCLED WATER: CLASSIFICATION AND USES TABLES

Current through August 31, 2023
01.
Municipal Recycled Water --
			 Classification Tables
. The tables summarize treatment for municipal
			 recycled water as outlined in Section
			 601. If discrepancies exist between
			 Sections 601 and
			 602, follow Section
			 601.
Class A
Class B
Class C
Class D
Class E
Oxidized
Yes
Yes
Yes
Yes
No
Filtered
Yes
Yes
No
No
No
Disinfected
Yes
Yes
Yes
Yes
No
Total coliform (organisms/ 100
							 milliliters)
Median results for last x-days for which analysis
							 have been completed
2.2 7-day median
2.2 7-day median
23 5-day median
230 3-day median
No limit
Maximum in any sample
23
23
230
2300
No limit
Monitoring frequency
Daily
Daily
Once weekly
Once monthly
(4-6-23)
Class A
Class B
Turbidity (NTU)
24-hour - mean, Not to exceed
Granular or cloth media - 2 Membrane filter -
							 0.2
Granular or cloth media - 5
Maximum, in any sample
Granular or cloth media - 5 Membrane filter -
							 0.5
Granular or cloth media - 10
Monitoring frequency
Continuous
Continuous
Disinfection contact time
							 requirements
CT of 450 mg-min/L with 90 minutes of modal contact
							 time,
or
Disinfection to 5-log inactivation of
							 virus
Total chlorine not less than 1 mg/L after 30 minute
							 contact time,
or
Comparable alternate process
Maximum total nitrogen (mg/L)
Monthly arithmetic mean, from weekly composite
							 samples not to exceed
Ground water recharge - 10
Residential irrigation and other non-recharge uses -
							 30
BOD5 (mg/L)
Monthly arithmetic mean, from weekly composite
							 samples not to exceed
Ground water recharge - 5
Residential irrigation and other non-recharge uses -
							 10
pH
Daily grab samples or continuous
							 monitoring
Between 6.0 and 9.0
(4-6-23)
02.
Municipal Recycled Water - Uses Beneficial Reuse
. This table
			 summarizes municipal recycled water uses for specific classifications. Other
			 uses not listed here may be considered on a case-by-case basis and approved by
			 the Department.
Recycled Water Beneficial
							 Reuse
Class A
Class B
Class C
Class D
Class E
Fodder, fiber crops
Yes
Yes
Yes
Yes
Yes
Commercial timber, firewood
Yes
Yes
Yes
Yes
Yes
Processed food crops or "food crops that must undergo
							 commercial pathogen-destroying processing before being consumed by
							 humans"
Yes
Yes
Yes
Yes
No
Ornamental nursery stock, or Christmas
							 trees
Yes
Yes
Yes
Yes
No
Sod and seed crops not intended for human
							 ingestion
Yes
Yes
Yes
Yes
No
Pasture for animals not producing milk for human
							 consumption
Yes
Yes
Yes
Yes
No
Pasture for animals producing milk for human
							 consumption
Yes
Yes
Yes
No
No
Orchards and vineyards irrigation during the fruiting
							 season, if no fruit harvested for raw use comes in contact with the irrigation
							 water or ground, or will only contact the inedible portion of raw food
							 crops
Yes
Yes
Yes
No
No
Highway medians and roadside vegetation irrigation on
							 sides
Yes
Yes
Yes
No
No
Cemetery irrigation
Yes
Yes
Yes
No
No
Parks, playgrounds, and school yards during periods
							 of non-use
Yes
Yes
No
No
No
Parks, playgrounds, and school yards during periods
							 of use
Yes
No
No
No
No
Golf courses
Yes
Yes
No
No
No
Food crops, including all edible food
							 crops
Yes
Yes
No
No
No
Residential landscape
Yes
No
No
No
No
Dust suppression at construction sites and control on
							 roads and streets
Yes
Yes
Yes
No
No
Toilet flushing at industrial and commercial sites,
							 when only trained maintenance personnel have access to plumbing for
							 repairs
Yes
Yes
Yes
No
No
Nonstructural fire fighting
Yes
Yes
Yes
No
No
Cleaning roads, sidewalks, and outdoor work
							 areas
Yes
Yes
Yes
No
No
Backfill consolidation around non-potable
							 piping
Yes
Yes
Yes
No
No
Soil compaction
Yes
Yes
Yes
No
No
Commercial campus irrigation
Yes
Yes
No
No
No
Fire suppression
Yes
Yes
No
No
No
Snowmaking for winter parks, resorts
Yes
No
No
No
No
Commercial laundries
Yes
No
No
No
No
Ground water recharge through surface
							 application
Yes
No
No
No
No
Subsurface distribution
Yes
Yes
Yes
Yes
No
(4-6-23)