Sec. 54-45. - Water quality—Generally.
(a) The components of water chemistry and water clarity, including free residual chlorine, combined chlorine, total chlorine, bromine, active halogen stabilizers, pH, total alkalinity, or others shall be kept within parameters established by the DCHD.
(b) Whenever a public and/or commercial swimming pool is in use, a minimum free chlorine residual of 2.0 ppm when a stabilizer such as cyanuric acid is introduced into the water, or 2.0 ppm bromine, shall be maintained in all parts of the pool, and the water shall have a pH between 7.2 and 7.8.
(c) Parameters for combined chlorine, total chlorine, halogen stabilizers, total alkalinity and bromine are contained in figure I.
(d) Whenever a public and/or commercial swimming pool is in use, the water shall be sufficiently clear to permit the entire pool bottom to be clearly visible from the decks and/or walkways or sufficiently clear to permit visual observation of the main drain or grate in the deepest portion of the pool.
(e) The water surface shall be free from scum and floating materials.
(f) The water shall have no odor, except, perhaps, a faint odor of the disinfecting agent.
(g) The pool bottom shall be maintained free from dirt, objects, refuse and foreign material.
(h) The maindrain cover or grate shall be a color contrasting with the background.
FIGURE I. WATER BALANCE PARAMETERS
Agent or Chemical Additive | Minimum | Maximum | Ideal
Chlorine—Free Residual (Pools) | 2.0 ppm | 10 ppm | 3.0—4.0 ppm
Chlorine (Spas, Wading Pools and Spray Parks) | 3.0 ppm | 10 ppm | 3.0—4.0 ppm
Chlorine—Combined | none | 0.5 ppm | none
Bromine—(Pools) | 2.0 ppm | 10 ppm | 4.0—6.0 ppm
Bromine (Spas, Wading Pools and Spray Parks) | 4.0 ppm | 10 ppm | 4.0—6.0 ppm
pH (hydrogen ion) | 7.2 | 7.8 | 7.5
Chlorine Stabilizers/Cyanuric Acids, etc. | 10 ppm | 100 ppm | 30—50 ppm
Total Alkalinity | 80 ppm | none | 125—150 ppm
Calcium Hardness | none | none | 200—400 ppm
*Total chlorine refers to the free chlorine residual plus the combined residual. When the combined residual exceeds 0.5 ppm, the pool water should be super-chlorinated to bring the combined residual to 0.5 ppm or less.
(Code 1980, § 54-45; Ord. No. 33770, § 10, 12-19-95; Ord. No. 34231, § 1, 6-17-97; Ord. No. 37382, § 18, 5-23-06)