010-5 Wyo. Code R. § 5-1
(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 |
| Temperature | Minimum | Ideal | Maximum |
| Temperature, °F | N/A | 78-82 | 98 |
| Temperature, °F - spas | N/A | 102 or less | 104 |
| 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. | |||
| Biological Parameters | Minimum | Ideal | Maximum |
| Algae | None | None | None |
| Bacteria | None | None | None |
| 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