The 52nd annual P3S Conference We Are All One, reflects the profound impact of working together across disciplines, backgrounds, and expertise to create lasting solutions. Learn what’s new, share what you’re experiencing, and get connected to a strong and supportive community. We’ll be at the beautiful historic Hayes Mansion in San Jose, a one-of-a-kind venue rich in heritage.
Be part of the momentum—over 250 agencies and firms are already represented, and counting!
2025 Pretreatment, Pollution Prevention, and Stormwater (P3S) Conference and Expo
February 3-5, 2025 | San Jose
Includes agencies participating in the co-located FOG Workshop.
| Azyura |
| Carmel Area Wastewater District |
| Carollo Engineers Inc |
| Castro Valley Sanitary District |
| Central Contra Costa SD |
| City of American Canyon |
| City of Arcata |
| City of Bakersfield |
| City of Beaumont |
| City of Boise |
| City of Buckeye |
| City of Burlingame |
| City of Camarillo |
| City of Chula Vista |
| City of Daly City |
| City of Davis |
| City of Dixon |
| City of East Palo Alto |
| City of El Centro |
| City of Escondido |
| City of Fresno |
| City of Gilroy |
| City of Glendale |
| City of Livermore |
| City of Lodi |
| City of Lompoc |
| City of Manteca |
| City of Merced |
| City of Modesto |
| City of Oceanside |
| City of Oxnard |
| City of Palo Alto |
| City of Paso Robles |
| City of Petaluma |
| City of Pinole |
| City of Pleasanton |
| City of Redding |
| City of Riverside |
| City of Roseville |
| City of Salinas Public Works Department |
| City of San Jose |
| City of San Luis Obispo WRRF |
| City of San Mateo |
| City of Santa Barbara |
| City of Santa Cruz |
| City of Santa Monica |
| City of Santa Rosa |
| City of Scottsdale |
| City of Seaside |
| City of Soledad |
| City of South San Francisco |
| City of Stockton |
| City of Sunnyvale |
| City of Turlock |
| City of Vacaville |
| City of Watsonville |
| City of Woodland |
| City of Yuba City |
| Cloacina LLC |
| County of Los Angeles Dept of Public Works |
| County of Monterey |
| County of Santa Cruz |
| County of Ventura |
| Craftwater Engineering |
| Dublin San Ramon Services District |
| East Bay MUD |
| El Dorado Irrigation District |
| Elsinore Valley MWD |
| Encina Wastewater Authority |
| Goleta SD |
| IDE Technologies, Inc. |
| Incline Village GID |
| Inland Empire Utilities Agency |
| Irvine Ranch Water District |
| Jamestown SD |
| Jurupa CSD |
| Larry Walker Associates |
| Las Virgenes Municipal WD |
| Los Angeles County Sanitation Districts |
| Montecito Water District |
| Monterey One Water |
| NapaSan |
| Nexinite |
| North of River SD #1 |
| Operational Technical Services (OTS) |
| Opti |
| Orange County Sanitation District |
| Oro Loma Sanitary District |
| P2 and Pretreatment Consultant |
| Rain for Rent |
| Sacramento Area Sewer District |
| Santa Ana Regional Water Quality Control Board |
| Santa Clara University |
| Santa Clara University |
| Selma Kingsburg Fowler CSD |
| Silicon Valley Clean Water |
| SmartCover Systems |
| Sonoma County Water Agency |
| South Orange County Wastewater Authority |
| South Placer MUD |
| Town of Apple Valley |
| Town of Windsor |
| Twain Harte Community Services District |
| Union Sanitary District |
| Valley Sanitary District |
| Victor Valley Wastewater |
| West Bay Sanitary District |
| West County Wastewater District |
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