Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Certification of Operators › Section 445A.629 - Classification of public water systems

Current through June 11, 2024
1. The Division
				shall classify all public water systems in this State pursuant to subsections 2
				and 3.
2. A public water system
				which uses groundwater, surface water, groundwater under the direct influence
				of surface water or water provided by another public water system must be
				classified for distribution on a point system as follows:
ITEMS FOR DISTRIBUTION CLASSIFICATION
POINTS
Average daily population served
25 - 500
								.................................................................................................................
......... 5
501 - 3,300
								............................................................................................................
......... 10
3,301 - 10,000
								.......................................................................................................
......... 15
10,001 - 100,000
								...................................................................................................
......... 20
100,001 or more
								....................................................................................................
......... 35
Pressure zones (1 point per zone, maximum of 5
								points).........................................
......... 1
Storage reservoirs (1 point per reservoir, maximum
								of 5 points).............................
......... 1
Hydropneumatic tank systems
								..................................................................................
......... 1
Pumping stations, including wells and boosters (1
								point per station, maximum of 3 points)
								................................................................................................................
......... 1
Disinfection to maintain system residual
								..................................................................
......... 5
System control and data acquisition or other
								similar instrumentation to provide data or process control
								..........................................................................................
......... 3
Existence of recycled or reclaimed water
								distribution system within drinking water service area
								.................................................................................................
......... 5
DISTRIBUTION CLASSIFICATION
TOTAL POINTS
Distribution-1
								........................................................................................................
5 - 19
Distribution-2
								........................................................................................................
20 - 30
Distribution-3
								........................................................................................................
31 - 41
Distribution-4
								........................................................................................................
42 or more
3. A
				public water system which:
(a) Uses surface
				water or groundwater under the direct influence of surface water; or
(b) Uses groundwater and provides treatment
				of the groundwater, other than disinfection by chlorination,
must be classified for treatment on a point system as
				  follows:
ITEMS FOR TREATMENT CLASSIFICATION
POINTS
Average daily population served
25 - 500
								...............................................................................................................
........... 5
501 - 3,300
								..........................................................................................................
........... 10
3,301 - 10,000
								.....................................................................................................
........... 15
10,001 - 100,000
								.................................................................................................
........... 20
100,001 or more
								..................................................................................................
........... 25
Source for public water system
Groundwater
								..............................................................................................................
.... 3
Groundwater under the direct influence of surface
								water.........................................
.... 4
Surface water
								.............................................................................................................
.... 5
Air stripping
								...................................................................................................................
.... 4
Ozone
								.............................................................................................................................
.... 8
Ultraviolet light
								..............................................................................................................
.... 8
Combination of ozone and ultraviolet light
								....................................................................
.... 10
Chemical addition for adjustments of pH
								......................................................................
.... 4
Iron and manganese removal
								..........................................................................................
.... 5
Iron and manganese sequestering
								...................................................................................
.... 2
Softening - ion exchange, lime or lime soda ash
								process...............................................
.... 10
Granular activated carbon for organic contamination
								....................................................
.... 7
Coagulation for pretreatment only
								.................................................................................
.... 5
Taste and odor control
								....................................................................................................
.... 4
Fluoridation
								....................................................................................................................
.... 5
Chlorine-ammonia treatment
								..........................................................................................
.... 8
Chlorine dioxide
								.............................................................................................................
.... 8
Bacteriological or chemical laboratory (other than
								process control).............................
.... 2
Blending, aesthetic
								.........................................................................................................
.... 5
Blending, health effects
								....................................................................................................
.. 8
Chlorine gas or hypochlorite
								............................................................................................
.. 5
Chlorine gas or hypochlorite generated on-site
								................................................................
.. 6
Chemical addition (1 point for each chemical added)
								......................................................
.. 1
Primary inorganic chemical treatment
								.............................................................................
.. 8
Point-of-use
								......................................................................................................................
.. 5
Nitrate or nitrite removal
								..................................................................................................
.. 8
Adsorption process for aesthetics
								.....................................................................................
.. 3
Recycle filter backwash water to process
								.........................................................................
.. 3
Recycle supernatant from sludge removal and
								sedimentation process............................
.. 2
Recycle water from any mechanical dewatering
								process.................................................
.. 2
System control and data acquisition or other
								similar instrumentation to provide data or process control
								.................................................................................................
.. 3
Filtration
Conventional filtration-coagulation, flocculation,
								sedimentation...............................
.. 10
Direct filtration-coagulation, flocculation,
								sedimentation...........................................
.. 10
Rapid sand
								...................................................................................................................
.. 7
Diatomaceous earth
								.....................................................................................................
.. 7
Slow sand
								.....................................................................................................................
.. 5
Bag, ceramic, microfiltration, nanofiltration,
								reverse osmosis, membrane, electro dialysis
								..........................................................................................................
5
TREATMENT CLASSIFICATION
TOTAL POINTS
Treatment-1
								...............................................................................................
............ 5 - 19
Treatment-2
								...............................................................................................
............ 20 - 35
Treatment-3
								...............................................................................................
............ 36 - 45
Treatment-4
								...............................................................................................
............ 46 or more