Okla. Admin. Code § 252:631-1-2
In addition to terms defined in Title 27A of the Oklahoma Statutes, the following words or terms, when used in this Chapter, shall have the following meaning unless the context clearly indicates otherwise:
"Accredited laboratory" means a laboratory accredited through the DEQ laboratory accreditation program.
"AWWA" means the American Water Works Association.
"Direct Integrity Test" means a physical test applied to a membrane unit in order to identify and isolate integrity breaches.
"DEQ" means the Oklahoma Department of Environmental Quality.
"Disinfection" means a process that inactivates pathogenic organisms in water by chemical oxidants or equivalent agents.
"EPA" means the Environmental Protection Agency.
"Groundwater under the direct influence of surface water" means any water beneath the surface of the ground with significant occurrence of insects or other macroorgan-isms, algae, or large-diameter pathogens such as Giardia Lamblia or Cryptosporidium, or significant and relatively rapid shifts in water characteristics such as turbidity, temperature, conductivity, or pH that closely correlate to climatological or surface water conditions.
"Indirect Integrity Monitoring" means monitoring some aspect of membrane filtrate water quality that is indicative of the removal of particulate matter.
"Laboratory checks" means chemical, radiochemical, physical, bacteriological, and microbiological tests made in a laboratory approved by the DEQ, on water samples submitted to confirm the quality of the water.
"Maximum contaminant level (MCL)" means the maximum permissible level of a contaminant in a Public Water Supply system that has been determined to be necessary to safeguard the public health as specified in these regulations.
"Maximum residual disinfectant level (MRDL)" means the level of a disinfectant added for water treatment that may not be exceeded at the consumer's tap without an unacceptable possibility of adverse health effects.
"Minor public water supply system" means a water system not included in the public water supply system definition. Minor public water supply systems are regulated by OAC 252:624.
"OAC" means Oklahoma Administrative Code.
"Operating records and reports" means the daily record of data connected with the operation of the system compiled in a monthly report.
"OWRB" means the Oklahoma Water Resources Board.
"Point of connection (POC)" means the point at which a consecutive system receives water from the wholesale system. This is not the same as a "point of entry."
"Point of entry (POE)" means the point at which a source or combination of sources enters the distribution system.
"Primary Drinking Water Standards" means the maximum levels of contaminants as listed in 40 CFR Part 141 which are limited in drinking water in order to protect public health.
"Protected groundwater free of sanitary defects" means a ground water source that is properly designed and permitted, practices full-time chlorination, and is properly operated and maintained as evidenced by no critical deficiencies on inspections.
"Public Water Supply (PWS) system" means any system providing water for human consumption through pipes or other constructed conveyances, if such system has at least fifteen(15) service connections or regularly serves an average of at least twenty-five(25) individuals daily at least sixty(60) days per year, whether receiving payment for same or not. Multi-family dwellings, manufactured home communities, mobile home parks, recreational vehicle (RV) parks, and correctional facilities, which are constructed, inspected and maintained under a State or locally approved plumbing code, purchase water from a permitted water system, do not provide treatment, and do not resell water, are not classified as a Public Water Supply system. The following are the categories of Public Water Supply systems:
(A) "Community water system" means any PWS system that serves at least fifteen (15) service connections used by year-round residents or regularly serves at least twenty-five(25) year-round residents.
(B) "Non-community water system" means any PWS system that serves an average of at least twenty-five (25) individuals at least sixty (60) days per year but is neither a community water system nor a non-transient non-community water system.
(C) "Non-transient non-community (NTNC) water system" means any PWS system that is not a community water system and that regularly serves at least twenty-five (25) of the same persons over six (6) months per year.
"Residual disinfectant concentration" means the concentration of disinfectant measured in milligrams per liter (mg/l) in a representative sample of water.
"Secondary standard" means a non-mandatory guideline that has been determined to be desirable to provide acceptable drinking water.
"Slow sand filtration" means a process involving passage of raw water through a bed of sand at low velocity (generally less than 50 gallons/sq.ft./day) resulting in substantial particulate removal by physical and biological mechanisms.
"Source" means any lake, stream, spring or groundwater supply that is used as treated or untreated water for a PWS system.
"Total coliform positive sample" means a sample in which one or more coliform organisms are found.
"Treatment technique" means the practice of a PWS system to properly remove pathogens and total organic carbon.
"Turbidity" means the amount of suspended material in water as measured by Nephelometric Turbidity Units (NTU).
"Water Treatment" means the act of removing contaminants from source water or adjusting water quality by the addition of chemicals, filtration, and other processes, thereby making the water safe for human consumption.
Okla. Admin. Code § 252:631-1-2