CHAPTER 445A - WATER CONTROLS

NAC 445A.922 Retention of records from monitoring. (NRS 445A.425, 445A.465, 445A.660) 1. The holder of a permit shall retain records of all information resulting from the monitoring required by the permit including: (a) The records of the calibration and maintenance of the inject…

NAC 445A.923 Plugging and abandonment: Plan; notice; procedure; certification. (NRS 445A.425, 445A.465, 445A.500) 1. If the plan for plugging and abandoning an injection well is determined by the Director to be adequate, it will be incorporated as a condition to the permit. 2. Th…

NAC 445A.924 When well is deemed abandoned. (NRS 445A.425, 445A.465) An injection well with casing shall be deemed to be abandoned if its use has been discontinued for at least 1 year. An injection well in which a casing has not been run and for which drilling operations have cea…

NAC 445A.925 Plugging of well determined to be abandoned. (NRS 445A.425, 445A.465) 1. If the Director determines that a well is abandoned, he or she may order it to be plugged in accordance with the requirements of the approved plan for abandonment. If no plan for abandonment has…

NAC 445A.950 Definitions. (NRS 445A.425) As used in NAC 445A.950 to 445A.9706, inclusive, unless the context otherwise requires, the words and terms defined in NAC 445A.9502 to 445A.9576, inclusive, have the meanings ascribed to them in those sections. (Added to NAC by Environmen…

NAC 445A.9502 “Administrative authority” defined. (NRS 445A.425) “Administrative authority” means an officer, board, department or agency of a county, city or other political subdivision of this State that has entered into an agreement with the Division to administer and enforce …

NAC 445A.9504 “Administrator” defined. (NRS 445A.425) “Administrator” means the Administrator of the Division. (Added to NAC by Environmental Comm’n by R194-07, eff. 8-26-2008)

NAC 445A.9506 “Advanced wastewater treatment unit” defined. (NRS 445A.425) “Advanced wastewater treatment unit” means a treatment unit that treats domestic sewage to discharge levels that exceed conventional septic tank effluent. The term includes, without limitation, a system us…

NAC 445A.9508 “Aerobic wastewater treatment unit” defined. (NRS 445A.425) “Aerobic wastewater treatment unit” means a treatment unit which adds oxygen to sewage and is designed to provide an additional level of sewage treatment before the disposal of sewage. (Added to NAC by Envi…

NAC 445A.951 “Alternative system” defined. (NRS 445A.425) “Alternative system” means any alternative treatment unit, alternative effluent absorption system or combination of both that is approved by the Division or other administrative authority for use as or in an on-site sewage…

NAC 445A.9512 “Biochemical oxygen demand” defined. (NRS 445A.425) “Biochemical oxygen demand” means a measure, set forth in milligrams per liter or parts per million, of the amount of oxygen required by any bacteria or other microorganisms to oxidize any organic matter present in…

NAC 445A.9514 “Capping fill trench” defined. (NRS 445A.425) “Capping fill trench” means an effluent absorption system for which the disposal pipe is at or near grade and the effective disposal trench sidewall is installed at least 12 inches into the natural soil and below a soil …

NAC 445A.9516 “Certificate of completion” defined. (NRS 445A.425) “Certificate of completion” means a statement issued in writing by a design engineer that certifies to the Division or other administrative authority that an on-site sewage disposal system is constructed in accorda…

NAC 445A.9518 “Cesspool” defined. (NRS 445A.425) “Cesspool” means a covered excavation in the ground which receives the discharge of domestic sewage or other organic wastes from a drainage system which is designed to retain organic matter and solids while permitting liquids to se…

NAC 445A.952 “Cluster system” defined. (NRS 445A.425) 1. “Cluster system” means a sewage system: (a) Which serves a group of residences or other occupied buildings that discharges sewage into an individual septic tank on each property or into a common septic tank which is connect…

NAC 445A.9522 “Commercial facility” defined. (NRS 445A.425) “Commercial facility” means any structure, building, group of structures or buildings, or mobile home park, or any portion thereof, other than a single-family dwelling. (Added to NAC by Environmental Comm’n by R194-07, e…

NAC 445A.9524 “Department” defined. (NRS 445A.425) “Department” means the State Department of Conservation and Natural Resources. (Added to NAC by Environmental Comm’n by R194-07, eff. 8-26-2008)

NAC 445A.9526 “Design engineer” defined. (NRS 445A.425) “Design engineer” means a person who is licensed by the State Board of Professional Engineers and Land Surveyors to practice professional engineering in this State. (Added to NAC by Environmental Comm’n by R194-07, eff. 8-26…

NAC 445A.9528 “Director” defined. (NRS 445A.425) “Director” means the Director of the Department or the Director’s designee. (Added to NAC by Environmental Comm’n by R194-07, eff. 8-26-2008)

NAC 445A.953 “Division” defined. (NRS 445A.425) “Division” means the Division of Environmental Protection of the Department. (Added to NAC by Environmental Comm’n by R194-07, eff. 8-26-2008)

NAC 445A.9532 “Domestic sewage” defined. (NRS 445A.425) “Domestic sewage” means any liquid and waterborne waste that is derived from the ordinary living process and is of such a character as to permit its satisfactory disposal into a public sewer or an on-site sewage disposal sys…

NAC 445A.9534 “Drain media” defined. (NRS 445A.425) “Drain media” means any clean washed gravel, clean crushed rock or other type of natural or synthetic aggregate, including, without limitation, chipped tires, which is approved by the Administrator for use in the distribution an…

NAC 445A.9536 “Effluent absorption system” defined. (NRS 445A.425) “Effluent absorption system” means any sewage treatment system that distributes and treats effluent for subsurface disposal. (Added to NAC by Environmental Comm’n by R194-07, eff. 8-26-2008)

NAC 445A.9538 “Failing system” defined. (NRS 445A.425) “Failing system” means any sewage treatment system which discharges untreated or incompletely treated sewage or septic tank effluent directly or indirectly on the surface of the ground or into any waters of the State. (Added …

NAC 445A.954 “Filter media” defined. (NRS 445A.425) “Filter media” means sand or other similar material used in a sand filter. (Added to NAC by Environmental Comm’n by R194-07, eff. 8-26-2008)

NAC 445A.9542 “General permit” defined. (NRS 445A.425) “General permit” means a permit to operate an on-site sewage disposal system that: 1. Handles 15,000 gallons of flow per day or less; 2. Receives only domestic sewage; and 3. Uses subsurface disposal. (Added to NAC by Environ…

NAC 445A.9543 “Holding tank system” defined. (NRS 445A.425) “Holding tank system” means a stationary tank or tanks that operate in series or in parallel for the storage and accumulation of domestic sewage. (Added to NAC by Environmental Comm’n by R136-24, eff. 11-15-2024)

NAC 445A.9544 “Individual permit” defined. (NRS 445A.425) “Individual permit” means a permit to operate an on-site sewage disposal system that: 1. Handles more than 15,000 gallons of flow per day; 2. Receives flows other than domestic sewage; 3. Uses surface disposal; or 4. Serve…

NAC 445A.9546 “Industrial waste” defined. (NRS 445A.425) “Industrial waste” means any liquid, gaseous, radioactive or solid waste substance, or combination thereof, resulting from any process of industry, manufacturing, trade or business or from the development or recovery of any…

NAC 445A.9548 “Long-term acceptance rate” defined. (NRS 445A.425) “Long-term acceptance rate” means the volume of wastewater that can be applied to a square foot of soil each day, over an indefinite period, such that the wastewater is properly treated and the effluent is absorbed…

NAC 445A.955 “Nitrogen management area” defined. (NRS 445A.425) “Nitrogen management area” means an area that has been identified by the Division with levels of nitrogen that are at or approaching 5 milligrams per liter measured as total nitrogen in the groundwater or surface wat…

NAC 445A.9552 “Nitrogen removal wastewater treatment unit” defined. (NRS 445A.425) “Nitrogen removal wastewater treatment unit” means a treatment unit that significantly reduces the total nitrogen level of effluent through biological denitrification, chemical reduction or ion exc…

NAC 445A.9554 “Nitrogen restricted area” defined. (NRS 445A.425) “Nitrogen restricted area” means an area that has been identified by the Division as having levels of nitrogen that are at or approaching 10 milligrams per liter measured as total nitrogen in the groundwater or surf…

NAC 445A.95545 “Operate in parallel” defined. (NRS 445A.425) “Operate in parallel” means that the holding tanks in a holding tank system have an equal supply of influent and operate congruently. (Added to NAC by Environmental Comm’n by R136-24, eff. 11-15-2024)

NAC 445A.9555 “Operate in series” defined. (NRS 445A.425) “Operate in series” means that the holding tanks in a holding tank system connect in such a way that one tank will overflow or feed into the next subsequent tank. (Added to NAC by Environmental Comm’n by R136-24, eff. 11-1…

NAC 445A.9556 “On-site sewage disposal system” defined. (NRS 445A.425) “On-site sewage disposal system” means any existing or proposed on-site system for the treatment and disposal of domestic sewage, including, without limitation, a standard subsurface, alternative or experiment…

NAC 445A.9558 “Percolation test” defined. (NRS 445A.425) “Percolation test” means a procedure to determine the relatively constant rate, calculated in minutes per inch, at which clear water maintained at a constant depth seeps out of a standard-sized test hole that has been previ…

NAC 445A.956 “Person” defined. (NRS 445A.425) “Person” means any natural person, corporation, association, firm, partnership, joint-stock company, public or municipal corporation, political subdivision, the State or any agency thereof, or the Federal Government and any agency the…

NAC 445A.9562 “Pressure distribution system” defined. (NRS 445A.425) “Pressure distribution system” means any effluent absorption system designed to uniformly distribute septic tank or other treatment unit effluent under pressure into an effluent absorption system. (Added to NAC …

NAC 445A.9564 “Projected daily sewage flow” defined. (NRS 445A.425) “Projected daily sewage flow” means the peak quantity of sewage a facility is estimated to produce on a daily basis and upon which the sizing and design of the on-site sewage disposal system is based. (Added to N…

NAC 445A.9566 “Sand filter” defined. (NRS 445A.425) “Sand filter” means a portion of an effluent absorption system with 2 feet or more of sand or any other filter media designed to chemically and biologically process septic tank or other treatment unit effluent from a pressure di…

NAC 445A.9568 “Sand filter system” defined. (NRS 445A.425) “Sand filter system” means an alternative effluent absorption system that uses: 1. A dosing system with an effluent pump and controls or a dosing siphon, piping and fittings; and 2. An absorption system which includes a s…

NAC 445A.957 “Total suspended solids” defined. (NRS 445A.425) “Total suspended solids” means the total amount of filterable solids in a water sample, measured in milligrams per liter. (Added to NAC by Environmental Comm’n by R194-07, eff. 8-26-2008)

NAC 445A.9572 “Treatment unit” defined. (NRS 445A.425) “Treatment unit” means a septic tank or other system designed to treat sewage before its release into an effluent absorption system. (Added to NAC by Environmental Comm’n by R194-07, eff. 8-26-2008)

NAC 445A.9574 “Vector attraction” defined. (NRS 445A.425) “Vector attraction” means the natural attraction of living organisms, including, without limitation, insects, rodents and birds, that are capable of transmitting a pathogen from one organism to another, to sewage, effluent…

NAC 445A.9576 “Waters of the State” defined. (NRS 445A.425) “Waters of the State” has the meaning ascribed to it in NRS 445A.415. (Added to NAC by Environmental Comm’n by R194-07, eff. 8-26-2008)

NAC 445A.959 Purpose. (NRS 445A.425, 445A.490) 1. The purpose of NAC 445A.950 to 445A.9706, inclusive, is to prescribe the requirements for on-site sewage disposal systems for the protection of the public health, safety and welfare of the people of the State of Nevada. 2. The pro…