| WAC Sections | |
| 246-274-001 | Purpose—Intent. |
| 246-274-003 | Applicability. |
| 246-274-005 | Other applicable requirements. |
| 246-274-007 | Administration. |
| 246-274-009 | Definitions. |
| 246-274-011 | Greywater irrigation systems—General requirements. |
| 246-274-100 | Tier 1 greywater irrigation systems. |
| 246-274-200 | Tier 2 greywater irrigation systems. |
| 246-274-300 | Tier 3 greywater irrigation systems. |
| 246-274-400 | Greywater reuse treatment technologies—Tier 3 greywater irrigation systems. |
| 246-274-405 | Location. |
| 246-274-410 | Design requirements—General—Tier 2 and Tier 3 greywater irrigation systems. |
| 246-274-415 | Design requirements—Irrigation field components—Tier 2 and Tier 3 greywater irrigation systems. |
| 246-274-420 | Soil and site evaluation—Tier 2 and Tier 3 greywater irrigation systems. |
| 246-274-425 | Installation permit requirements—Tier 2 and Tier 3 greywater irrigation systems. |
| 246-274-430 | Installers—Tier 2 and Tier 3 greywater irrigation systems. |
| 246-274-435 | Installation inspection—Tier 2 and Tier 3 greywater irrigation systems. |
| 246-274-440 | Operation and maintenance—Tier 2 and Tier 3 greywater irrigation systems. |
| 246-274-445 | Failures. |
| 246-274-450 | Enforcement. |
| 246-274-455 | Hearings. |
| 246-274-460 | Waivers. |
| 246-274-465 | Effective date. |