The goals of the water quality program are to prevent and clean up water pollution and to help communities make sustainable choices that reduce and prevent water quality problems.

The program also aims to provide water quality partners with technical, financial, and education assistance. We produce useful water quality information for the public and our partners.

AQUATIC PLANTS & LAKES

Aquatic Plant Identification | Aquatic Plant Management | Lake Information | Pesticides to Control Aquatic Plants | More

GRANTS AND LOANS

Water Quality Grant and Loan Funding | More

GROUND AND SURFACE WATER QUALITY

Ground Water | Surface Water | UIC Program | Use Attainability Analysis | Water Quality Monitoring | More

NONPOINT POLLUTION - POLLUTED RUNOFF

Nonpoint Plan | Land Use |  Agriculture | Forestry | Phosphorus Ban | More

PERMITS - POINT SOURCE POLLUTION

Combined Sewer Overflows (CSO) | Permitting and Reporting Information System (PARIS) | General Permits (non-stormwater) | Permit Guidance/Data/Forms | Orange Book | 401 for Dams (FERC) | Permit Fees | Cruise Ship Lines MOU | More

PUGET SOUND WATER QUALITY

SPS Dissolved Oxygen | Dissolved Oxygen Model | More

STORMWATER

Permits | Technical Assistance | Stormwater Mgmt. Manuals | More

WASTEWATER TREATMENT

Wastewater Operator Certification Program | Reclaimed Water | Wastewater Treatment Resources | More

WATER QUALITY ASSESSMENT AND TMDLs

Water Quality Assessment [303(d)] | Water Quality Improvement Projects (TMDLs)