010-5 Wyo. Code R. § 5-2
(a) Operators of public swimming pools, spas and similar installations shall test the water for sanitizing levels, pH levels, water clarity and water temperature at the following minimum frequencies when the pool, spa or similar installation is open for operation:
(b) If, at any time, testing indicates the pool, spa or similar installation water does not comply with any of the applicable parameters listed in section 2(a) above, the operator shall immediately close the pool, spa or similar installation.
(c) The swimming pool or spa water shall be tested for total alkalinity and calcium hardness at least once each week the swimming pool or spa is open for use.
(d) If cyanuric acid or a stabilized chlorine is used at a swimming pool, the water shall be tested for cyanuric acid each month the pool is open for use.
(e) Water testing results shall be recorded as described in Chapter 1, section 10(a)(i).
(f) Due to the unique nature of mineral water, natural mineral flow through pools are exempt from the clarity parameters described in section 1(a) of this chapter.
(g) At any time the water clarity becomes a swimmer's safety factor such as bottom visibility in the professional judgement of the operator or lifeguard, the pool shall be cleared of all users.
010-5 Wyo. Code R. § 5-2