| Chapter 90.03. Water code. |
| Chapter 90.08. Stream patrollers. |
| Chapter 90.14. Water rights—Registration—Waiver and relinquishment, etc. |
| Chapter 90.16. Appropriation of water for public and industrial purposes. |
| Chapter 90.22. Minimum water flows and levels. |
| Chapter 90.24. Regulation of outflow of lakes. |
| Chapter 90.28. Miscellaneous rights and duties. |
| Chapter 90.36. Artesian wells. |
| Chapter 90.38. Yakima river basin water rights. |
| Chapter 90.40. Water rights of United States. |
| Chapter 90.42. Water resource management. |
| Chapter 90.44. Regulation of public groundwaters. |
| Chapter 90.46. Reclaimed water use. |
| Chapter 90.48. Water pollution control. |
| Chapter 90.50A. Water pollution control facilities—Federal capitalization grants. |
| Chapter 90.52. Pollution disclosure act of 1971. |
| Chapter 90.54. Water resources act of 1971. |
| Chapter 90.56. Oil and hazardous substance spill prevention and response. |
| Chapter 90.58. Shoreline management act of 1971. |
| Chapter 90.64. Dairy nutrient management. |
| Chapter 90.66. Family farm water act. |
| Chapter 90.71. Puget Sound water quality protection. |
| Chapter 90.72. Shellfish protection districts. |
| Chapter 90.74. Aquatic resources mitigation. |
| Chapter 90.76. Underground storage tanks. |
| Chapter 90.80. Water conservancy boards. |
| Chapter 90.82. Watershed planning. |
| Chapter 90.84. Wetlands mitigation banking. |
| Chapter 90.86. Joint legislative committee on water supply during drought. |
| Chapter 90.88. Aquatic rehabilitation zones. |
| Chapter 90.90. Columbia river basin water supply. |
| Chapter 90.92. Pilot local water management program. |