010-5 Wyo. Code R. § 5-1

Current through April 27, 2019

Section 5-1 - Water Quality

(a) The water quality for pools, spas and similar installations shall meet the criteria outlined in the following charts:

Sanitizing Levels	Minimum	Ideal	Maximum
Free Chlorine, ppm	1.0	2.0-3.0	8.0¹
Free Chlorine, ppm - spas	2.0	3.0-5.0	8.0¹
Combined Chlorine, ppm	None	None	0.5
Bromine, ppm	2.5	2.5-6.0	12.0¹
Bromine, ppm - spas	4.5	5.5-7.5	12.0¹
¹ Refer to product label for maximum level.

pH Levels	Minimum	Ideal	Maximum
pH	7.0	7.4-7.6	7.8

Water Clarity	Minimum	Ideal	Maximum
Water Clarity	Bottom and main drain grate design, clearly visible from the deepest part of the pool, spa or similar installation.	N/A	N/A

Stabilizer, if used	Minimum	Ideal	Maximum
Cyanuric acid, ppm¹	None	10.0-40.0	100.0
¹ Cyanuric acid shall not be used in indoor pools, spas or similar installations or brominated pools, spas or similar installations without approval from the regulatory authority.

Chemical Parameters	Minimum	Ideal	Maximum
Total alkalinity, ppm as CaCO³	60.0	80-100.0 ¹ 100.0-120.0 ²	180.0
Total dissolved solids, ppm	300.0	1000.0-2000.0	5000.0
Calcium hardness, ppm as CaCO³	150.0	200.0-400.0	500.0-1000.0
Heavy metals	None	None	None
¹ For the following sanitizers: calcium hypochlorite, lithium hypochlorite and sodium hypochlorite. ² For the following sanitzers: Sodium dichlor, chlorine gas and bromine compounds.

Oxidation Reduction Potential (ORP)	Minimum	Ideal	Maximum
Oxidation Reduction Potential (ORP), mV	650	N/A	N/A
¹ When chlorine or bromine is used as the primary sanitizing agent, ORP/HRR can be used as a supplemental measurement of proper sanitizer activity. The use of ORP testing does not eliminate or supercede the need for testing the sanitizer level with standard test kits, as the ORP reading may be affected by a number of factors including pH, probe film, cyanuric acid and others.

010-5 Wyo. Code R. § 5-1