Current through Register Vol. XLI, No. 50, December 13, 2024
Section 64-16-7 - Water Quality7.1. Disinfection. 7.1.a. A recreational water facility, with the exception of bathing beaches, shall be disinfected continuously by the use of chemical feed equipment.7.1.b. A recreational water facility may not use hand batch feeding of disinfecting chemicals except when performing super-chlorination or shocking.7.1.c. Disinfecting materials and methods shall:7.1.c.1. Be used only with the approval of the Commissioner.7.1.c.2. Not create an undue safety hazard;7.1.c.3. Be handled, stored, and used according to directions;7.1.c.4. Be compatible for use with other chemicals commonly used in pool water treatment, or be clearly identified as having a use limitation;7.1.c.5. Not impart toxic properties to the water when used according to directions; and7.1.c.6. Provide an effective residual which can be easily and accurately measured by a field test procedure.7.1.d. When chlorine is used as the disinfectant, the recreational water facility shall maintain a free chlorine residual of at least one (1) milligram per liter (mg/l) to a maximum of five (5) milligrams per liter (mg/l) throughout.7.1.e. When bromine is used as the disinfectant, the recreational water facility shall maintain a residual of at least two (2) milligrams per liter (mg/l) to a maximum of five (5) milligrams per liter (mg/l) throughout.7.1.f. Disinfecting materials or methods other than chlorine and bromine: 7.1.f.1. Shall be approved by the Commissioner prior to being used;7.1.f.2. Shall be registered as a bactericidal agent by the U.S. Environmental Protection Agency; and7.1.f.3. May be used if they provide a satisfactory residual which is easily measured and is as effective under conditions of use as the chlorine concentrations required in this rule.7.1.g. When cyanuric acid is used as a stabilizer, it must be maintained at a level between ten (10) and one hundred (100) milligrams per liter (mg/l).7.2. Chemical Requirements. 7.2.a. The water in a recreational water facility, except for bathing beaches, shall conform to the chemical limits specified in Division of Health rule, "Public Water Systems," 64CSR3.7.2.b. Bathing beach water shall conform to the standards prescribed for Category A in Appendix E of the Environmental Quality Board's rule, "Requirements Governing Water Quality Standards," 46CSR1.7.3. Bacteriological Requirements. 7.3.a. The Commissioner shall collect a series of water samples for bacteriological analysis from each recreational water facility. A series shall consist of one (1) water sample each from the deep end, the shallow end, and the wading pool, if applicable, or two (2) water samples from different locations of a bathing beach.7.3.b. Within thirty (30) days of the opening of seasonal recreational water facilities, the Commissioner shall collect not less than one (1) series of samples, and during the same season of operation, he or she shall collect not less than one (1) additional series of samples. For indoor recreational water facilities, the Commissioner shall collect not less than one (1) complete series of samples every six (6) months.7.3.c. A laboratory approved by the Commissioner shall examine water samples after the residual disinfectant in the samples is deactivated.7.3.d. The Commissioner shall collect water samples while the recreational water facility is in use.7.3.e. If laboratory results of a water sample from a recreational water facility, except for bathing beaches, indicate the presence of coliform organisms: 7.3.e.1. The operator shall super-chlorinate the recreational water facility, and the water shall be retested immediately; and7.3.e.2. The operator shall investigate the cause of the unsatisfactory sample and initiate, or cause to be initiated, corrective action.7.3.f. If laboratory results of a water sample from a bathing beach indicate that e. coli exceeds two hundred thirty-five (235) per one hundred (100) milliliters in any single sample: 7.3.f.1. The bathing beach shall cease operation and the water shall be retested immediately;7.3.f.2. The operator shall investigate the cause of the unsatisfactory sample and initiate, or cause to be initiated, corrective action.7.4. pH and Alkalinity Control. 7.4.a. A recreational water facility, except for bathing beaches, shall maintain the pH of the water in an alkaline condition of not less than seven point two (7.2) nor greater than seven point eight (7.8) at any time the facility is in use.7.4.b. A recreational water facility that is equipped with gaseous chlorination feeders shall provide a mechanical chemical feeder to continuously control the pH. Hand batch feeding of chemicals to control pH is prohibited.7.4.c. A recreational water facility, except for bathing beaches, shall maintain the total alkalinity at a level between sixty (60) and one hundred eighty (180) milligrams per liter (mg/l) as calcium carbonate.7.5. Water Clarity. 7.5.a. A recreational water facility, except for bathing beaches, shall maintain sufficient water clarity to allow the main drain or a six (6) inch black disk on the bottom of the deepest part of the recreational water facility to be readily visible when viewed from the recreational water facility deck.7.5.b. The operator shall use Table 64-15 C at the end of this rule as a guideline to assist him or her in maintaining optimum water quality at the recreational water facility.