| AgencyCode | AgencyName | | 2NDNATURE | 2NDNATURE, LLC |
| ABALONE | Abalone Coast Analytical |
| ADH | ADH Environmental |
| AECOM | AECOM |
| AECOM-Oakland | AECOM Oakland Office |
| AECOM-Sacramento | AECOM Sacramento Office |
| Not Recorded | Agency Not Recorded |
| APPL | Agriculture & Priority Pollutants Laboratories, Inc |
| ACFCWCD | Alameda County Flood Control & Water Conservation District |
| ACPWA | Alameda County Public Works Agency |
| ACCWP | Alameda Countywide Clean Water Program |
| Algalita | Algalita |
| ALPHA_San Diego | Alpha Analytical Laboratories Inc., San Diego |
| ALPHA_Ukiah | Alpha Analytical Laboratories Inc., Ukiah |
| ALPHA | Alpha Analytical, Inc. |
| AWG | Alpine Watershed Group |
| ALS | ALS Laboratory Group |
| ALTA | Alta Environmental |
| AMEC | AMEC Environment & Infrastructure |
| AETL | American Environmental Testing Laboratories |
| ARC | American River Conservancy |
| AR | American Rivers |
| ANARES | Analytical Resources, Inc. |
| AnchorQEA | Anchor QEA |
| AMS | Applied Marine Sciences, Inc. |
| AMS-CA | Applied Marine Sciences, Inc. California |
| AMSLabs | Applied Microbiological Services |
| AquaSci | AquaScience |
| ABCL | Aquatic Bioassay and Consulting Laboratories, Inc. |
| ABL_Chico | Aquatic Bioassessment Lab - Chico |
| DFW-ABL | Aquatic Bioassessment Lab - DFW |
| ABA | Aquatic Biology Associates, Inc. |
| DFW-ATL | Aquatic Toxicology Laboratory |
| AGCity | Arroyo Grande City |
| AssocLabs | Associated Laboratories |
| AXYS | AXYS Analytical Services Ltd. |
| BBL | B and B Laboratories, Inc. |
| Babcock | Babcock Laboratories |
| Balance | Balance Hydrologics, Inc. |
| BAL | Basic Laboratory, Inc. |
| BASMAA_RMC | BASMAA Regional Monitoring Coalition |
| Battelle-MA | Battelle Marine Sciences Laboratory - MA |
| Battelle-WA | Battelle Marine Sciences Laboratory - WA |
| BCA | Battle Creek Alliance |
| BCWC | Battle Creek Watershed Conservancy |
| BADA | Bay Area Dischargers' Association - Local Effects Monitoring |
| BCL | BC Laboratories, Inc. |
| BendGX | Bend Genetics LLC |
| BAS | BioAssessment Services |
| BiovirLab | Biovir Laboratories |
| BRL | Brelje and Race Laboratories, Inc. |
| BA | Brooks Applied Labs |
| BR | Brooks Rand Labs |
| BRWNCALD | Brown and Caldwell |
| BSK | BSK Analytical Laboratory |
| BSK-Fresno | BSK Associates Fresno |
| BSK-RanchoCordova | BSK Associates Rancho Cordova |
| BVC | Buena Vista Coalition |
| BVWSD | Buena Vista Water Storage District |
| BLM | Bureau of Land Management |
| CDSH-Napa | CA Department of State Hospitals-Napa |
| DWR-MWQI | CA Department of Water Resources - Municipal Water Quality Investigations |
| CASG-MLML | CA Sea Grant at Moss Landing Marine Laboratories |
| CAD_TWG | California Algae and Diatom Taxonomic Working Group |
| CDFA | California Department of Food and Agriculture, Center for Analytical Chemistry |
| DPR | California Department of Pesticide Regulation |
| CDPH | California Department of Public Health |
| Caltrans | California Department of Transportation |
| DWR-ND | California Department of Water Resources, Northern District |
| CLS | California Laboratories Services |
| CalPoly_SLO | California Polytechnic State University San Luis Obispo |
| CRC | California Rice Commission |
| CSUS | California State University at Sacramento |
| CSULB-IIRMES | California State University Long Beach Institute for Integrated Research in Materials, Environments, and Society |
| CSULB-SEAL | California State University Long Beach Stream Ecology and Assessment Laboratory |
| CSUMB | California State University Monterey Bay |
| CSUMB-WEE | California State University Monterey Bay Watershed Environment and Ecology Lab |
| CSUSB | California State University San Bernardino |
| CSUSM | California State University, San Marcos |
| CSUStan-CL | California State University, Stanislaus - Cover Lab |
| CTC | California Tahoe Conservancy |
| CalTrout | California Trout |
| CALSCI | CalScience Laboratories |
| CALTEST | CalTest Analytical Laboratory |
| CAMSD | Camarillo Sanitation District |
| CAPCO | Capco Analytical Services, Inc. |
| CapeFear | Cape Fear Analytical |
| Cardno | Cardno |
| CarlsbadCity | Carlsbad City |
| CASC_ENG | CASC Engineering |
| CATE | Cate School |
| CWD | Cawelo Water District |
| CDMS | CDM Smith |
| CELA | CEL Analytical, Inc |
| CCAMP | Central Coast Ambient Monitoring Program |
| CCSE | Central Coast Salmon Enhancement |
| CCWC | Central Coast Water Conservancy (CCWC) |
| CCWQP | Central Coast Water Quality Preservation, Inc. |
| CCWG-MLML | Central Coast Wetlands Group at Moss Landing Marine Labs |
| CCCSD | Central Contra Costa Sanitary District |
| CSERC | Central Sierra Environmental Resource Center |
| CH2MHILL | CH2M HILL |
| CCSF | City and County of San Francisco |
| CCSF-OBL | City and County of San Francisco - Oceanside Biology Lab |
| CCRML | City of Carmel-By-The-Sea |
| CCV | City of Chula Vista |
| CE | City of Encinitas |
| CES | City of Escondido |
| CLBHHS | City of Long Beach Health and Human Services |
| LBCPW | City of Long Beach Public Works |
| LAC_DPW_BSS | City of Los Angeles, Department of Public Works, Bureau of Street Services |
| CLAEMD | City of Los Angeles, Environmental Monitoring Division |
| OS | City of Oceanside |
| PRC | City of Paso Robles |
| CPL | City of Porterville Laboratory |
| CSD | City of San Diego |
| EMTS | City of San Diego Environmental Monitoring & Technical Services Laboratory |
| CSD_TSW | City of San Diego Transportation & Storm Water Department |
| CSJ | City of San Jose Water Pollution Control Plant |
| CSM | City of Santa Monica |
| CSR | City of Santa Rosa |
| CS | City of Santee |
| COSVWWTPL | City of Simi Valley WWTP laboratory |
| CTDPW | City of Torrance Department of Public Works |
| Vallejo | City of Vallejo |
| WC | City of Watsonville |
| WC_Lab | City of Watsonville Lab |
| CYC | City of Yuba City Water/Wastewater Laboratory |
| CWE | Civil, Water, Environmental |
| CLSB | Clinical Laboratory of San Bernardino |
| CVILC | Coachella Valley Irrigated Lands Coalition |
| CVWD | Coachella Valley Water District |
| CURES | Coalition for Urban/Rural Environmental Stewardship |
| CCR | Coastal Conservation and Research |
| CSLRCD | Coastal San Luis Resource Conservation District |
| CWC | Coastal Watershed Council |
| CAS | Columbia Analytical Services |
| Condor | Condor Earth Technologies |
| CCCWP | Contra Costa Clean Water Program |
| Ccity | Coronado City |
| CSDDEH | County of San Diego Department of Environmental Health |
| CEI | Cranmer Enginering and Anaytical Laboratory |
| CEL | Creek Environmental Laboratories, Inc. |
| Cressey | Cressey and Associates |
| CRGML | CRG Marine Laboratories, Inc. |
| DPC | Dana Point City |
| DCE | Dancing Coyote Environmental |
| DataChem | DataChem Laboratories, Inc |
| LABQA | default setting for lab generated QA samples |
| DelMarCity | Del Mar City |
| DDLV | Dellavalle Laboratory, Inc. |
| DeltaEnv | Delta Environmental Lab |
| DEL-TECH | Del-Tech Geotechnical Support Services |
| DFW | Department of Fish and Wildlife |
| DFW-Belden | Department of Fish and Wildlife Belden Office |
| DFW-LOSALA | Department of Fish and Wildlife Los Alamitos Office |
| DFW-Portola | Department of Fish and Wildlife Portola Office |
| DFW-RED | Department of Fish and Wildlife Redding Office |
| DFW-SanDiego | Department of Fish and Wildlife San Diego Office |
| DFW-Weave | Department of Fish and Wildlife Weaverville Office |
| DFW-OSPR | Department of Fish and Wildlife-OSPR |
| DWR | Department of Water Resources - Sacramento Office |
| DWR-BRYTE | Department of Water Resources Bryte Analytical Laboratory |
| DWR-SCRO | Department of Water Resources, South Central Region Office |
| Dionex | Dionex |
| D-Max | D-Max Engineering, Inc |
| Risebrough | Dr. Robert Risebrough's laboratory at the UCB Richmond Field Station |
| DCC | Dry Creek Conservancy |
| EBMUD | East Bay Municipal Utility District |
| EBRPD | East Bay Regional Park District |
| EcoAnalysts | EcoAnalysts, Inc |
| ECORP-Rocklin | ECORP Consulting, Inc. Rocklin |
| CEC | El Cajon City |
| EID | El Dorado Irrigation District Monitoring |
| EDTU | El Dorado Trout Unlimited |
| ESNERR | Elkhorn Slough National Estuarine Research Reserve NOAA |
| EMAX | EMAX Laboratories, Inc. |
| EN | Encina |
| EWA | Encina Wastewater Authority |
| ENTHALPY | Enthalpy Analytical, Inc. |
| ENTHALPY_Berkeley | Enthalpy Analytical, Inc., Berkeley |
| ENTHALPY_EDH | Enthalpy Analytical, Inc., EDH |
| EnviroMatrix | EnviroMatrix Analytical, Inc. |
| EMA | Environmental Micro Analysis |
| UCD-EQL | Environmental Quality Laboratory |
| EOA | EOA, Inc. |
| EPA-R9 | EPA Region 9 Lab |
| ECWQL | Escondido City Water Quality Laboratory |
| EuroFins | EuroFins |
| EEA | Eurofins Eaton Analytical, Inc. |
| EFGS | Eurofins Frontier Global Sciences |
| EXADMS | Exa Data & Mapping Services |
| ExcelChem | Excelchem Environmental Labs |
| FSURMP | Fairfield Suisun Urban Runoff Management Program |
| FRCRM | Feather River Coordinated Resource Management Group |
| Fordham | Fordham University |
| FDC | Friends of Deer Creek |
| FGS | Frontier Geosciences, Inc. |
| FGLE | Fruit Growers Lab (FGL Environmental) |
| FGLE-Stockton | Fruit Growers Lab (FGL Environmental) Stockton |
| GANDA | Garcia and Associates |
| GEI | GEI Consultants, Inc. |
| GEOANAL | Geoanalytical Laboratories, Inc. |
| GERG | Geochemical and Environmental Research Group |
| GCSU | Georgia College and State University |
| GC | Geosyntec Consultants |
| Golder | Golder |
| GLC | Goose Lake Coalition |
| GBP | Grassland Bypass Project |
| GBOC | Grassy Bar Oyster Company |
| GHWRMC-1718 | Greater Harbor Waters Regional Monitoring Coalition 2017/18 |
| GHWRMC-1819 | Greater Harbor Waters Regional Monitoring Coalition 2018/19 |
| HagarES | Hagar Environmental Science |
| HDR-SAC | HDR-Sacramento |
| HSWL | High Sierra Water Laboratory |
| Hoopa-Tribe | Hoopa Tribe |
| HSU-SL | Humboldt State University Department of Biological Sciences Shaunghnessy Lab |
| Hydrozoology | Hydrozoology |
| ICF-Los Angeles | ICF Los Angeles |
| ICF-Sacramento | ICF Sacramento |
| ICF-San Diego | ICF San Diego |
| IBCity | Imperial Beach City |
| IID | Imperial Irrigation District |
| IVILC | Imperial Valley Irrigated Lands Coalition |
| IEc | Industrial Economics, Inc |
| ICARE | Institute for Conservation, Advocacy, Research, and Education (ICARE) |
| Integral | Integral Consulting Inc. |
| IERS | Integrated Environmental Restoration Services |
| ITIS | Integrated Taxonomic Information System |
| ICEHS | Inyo County Environmental Health Services Water Lab |
| JLHA | John L Hunter and Associates |
| JLC | Jon Lee Consulting |
| KBWQA | Kaweah Basin Water Quality Association |
| Kaweah SW | Kaweah River Sub-Watershed |
| KTB | Keep Taho Blue |
| Kern SW | Kern River Sub-Watershed |
| KERNRWCA | Kern River Watershed Coalition Authority |
| KIFF | KIFF Analytical |
| KRCD | Kings River Conservation District |
| Kings SW | Kings River Sub-Watershed |
| KINGSRWCA | Kings River Watershed Coalition Authority |
| KEI | Kinnetic Environmental, Inc. |
| Kinnetic | Kinnetic Laboratories, Inc. |
| KLI-Santa Cruz | Kinnetic Laboratories, Inc. Santa Cruz Office |
| KBRT | Klamath Basin Rangeland Trust |
| Klamath-Tribes | Klamath Tribes |
| KTNRD | Klamath Tribes Natural Resource Department |
| KWP | Klamath Watershed Partnership |
| Kleinfelder | Kleinfelder |
| LMCity | La Mesa City |
| LEL | Laguna Environmental Laboratory |
| LCWRD | Lake County Water Resources Department |
| LWA | Larry Walker Associates |
| CIWQS 25746 | Lehigh Southwest Cement Co Redding |
| LGCity | Lemon Grove City |
| LongBeachCity | Long Beach City |
| LBCSMD | Long Beach City Stormwater Management Division |
| LACDPW-WMD | Los Angeles County Department of Public Works |
| LSCE | Luhdorff & Scalmanini, Consulting Engineers |
| Lunkefer | Lunkefer |
| MCSTOPPP | Marin County Stormwater Pollution Prevention Program |
| MPSL-DFW | Marine Pollution Studies Laboratory-DFW |
| MPSL-MLML | Marine Pollution Studies Laboratory-MLML |
| MTS | Marine Taxonomic Services |
| MAL | Maxxam Analytics |
| MBC | MBC Aquatic Sciences |
| MCA | McCampbell Analytical Inc. |
| MEI | McCord Environmental, Inc. |
| MEC | MEC Analytical Systems |
| MERID | Merced Irrigation District |
| MLJ-LLC | Michael L. Johnson, LLC |
| Michelson | Michelson Laboratories, Inc |
| Microbac-Arcata | Microbac Laboratories Arcata |
| MOE | Mikhail Ogawa Engineering |
| MLJEnvironmental | MLJ Environmental |
| MODCSP | Modesto City Stormwater Program |
| MCU | Modesto City Utilities |
| MCWQCL | Modesto City Water Quality Control Laboratory |
| MODID | Modesto Irrigation District |
| MBAS | Monterey Bay Analytical Services |
| MBARI-JL | Monterey Bay Aquarium Research Institute; Marine Chemistry Department Johnson Laboratory |
| MBNMS | Monterey Bay National Marine Sanctuary |
| MontereyCounty | Monterey County |
| MRWPCA | Monterey Regional Water Pollution Control Agency |
| MTA | Moore Twining Associates, Inc. |
| MBNEP | Morro Bay National Estuary Program |
| MBOC | Morro Bay Oyster Company |
| MLML_Oakden | Moss Landing Marine Laboratories - Oakden Lab |
| MLML-Coale | Moss Landing Marine Laboratories Coale Lab |
| MLML-RDC | Moss Landing Marine Laboratories Regional Data Center |
| MLML-BL | Moss Landing Marine Laboratories-Benthic Lab |
| MLML-TM | Moss Landing Marine Laboratories-Trace Metals Lab |
| MRCA | Mountains Recreation and Conservation Authority |
| MC | Murrieta City |
| MWH | MWH Laboratories |
| NAPARCD | Napa County Resource Conservation District |
| NCCity | National City |
| NAUT | Nautilus Environmental |
| NNEPA-WQ | Navajo Nation EPA Water Quality Program |
| NELL | NEL Laboratories |
| NDEP | Nevada Division of Environmental Protection |
| NTCD | Nevada Tahoe Conservation District |
| NewFields | NewFields |
| NL&FC | Newhall Land and Farming Company |
| NCL | North Coast Laboratories Ltd |
| NSDCWMP | North San Diego County Watershed Monitoring Program |
| NSR | North State Resources, Inc. |
| NECWA | Northeastern California Water Association |
| NAU | Northern Arizona University |
| NCNRCD | Northern California-Nevada Resource Conservation District |
| NGEM | Northgate Environmental Management, Inc. |
| NV5_Long Beach | NV5 Long Beach Office |
| NV5_Oceanside | NV5 Oceanside Office |
| OID | Oakdale Irrigation District |
| OCWUL | Oceanside City Water Utility Laboratory |
| OEC | Oilfield and Environmental Compliance |
| OCA | Orange Coast Analytical, Inc. |
| OC | Orange County |
| OCPHL | Orange County Public Health Lab |
| OCPW | Orange County Public Works |
| OCSD | Orange County Sanitation District |
| ODEQ | Oregon Department of Environmental Quality |
| PACE | Pace Analytical Service, Inc. |
| PCAS | Pacific Coast Analytical Services |
| PER | Pacific Ecorisk |
| PEL | Pacific Environmental Laboratory |
| PGE-San Ramon | Pacific Gas and Electric San Ramon |
| PVPWMG | Palos Verdes Peninsula Watershed Management Group |
| PDD | Panoche Drainage District |
| USLT_CSL_RCD | Partnernship between Upper Salinas-Las Tablas and Coastal San Luis Resource Conservation Districts |
| Pat-Chem | Pat-Chem Laboratories |
| Phycotech | Phycotech, Inc. |
| PHYSIS | PHYSIS Environmental Laboratories, Inc. |
| PNSSNS | PNSSNS Subwatershed Group |
| POLB | Port of Long Beach |
| POSD | Port of San Diego |
| PowayCity | Poway City |
| PPCG | Provost & Pritchard Consulting Group |
| PTS | PTS Laboratories |
| PCWG | Putah Creek Watershed Group |
| QVIR | Quartz Valley Indian Reservation |
| Ramboll | Ramboll Environ |
| RedHills | Red Hills Environmental, LLC |
| RESIGHINI | Resighini Racheria |
| RCDMC | Resource Conservation District of Monterey County |
| Rhithron | Rhithron Associates, Inc. |
| RiversideCounty | Riverside County |
| RCFC | Riverside County Flood Control |
| RBI | Robertson-Bryan, Inc. |
| RWQCB1 | RWQCB1-North Coast Region |
| RWQCB2 | RWQCB2-San Francisco Bay Region |
| RWQCB3 | RWQCB3-Central Coast Region |
| RWQCB4 | RWQCB4-Los Angeles Region |
| RWQCB5 | RWQCB5-Central Valley Region |
| RWQCB5F | RWQCB5-Central Valley Region (Fresno) |
| RWQCB5L | RWQCB5-Central Valley Region (Lower Sacramento) |
| RWQCB5S | RWQCB5-Central Valley Region (Sacramento) |
| RWQCB5U | RWQCB5-Central Valley Region (Upper Sacramento) |
| RWQCB6 | RWQCB6-Lahontan Region |
| RWQCB7 | RWQCB7-Colorado River Basin Region |
| RWQCB8 | RWQCB8-Santa Ana Region |
| RWQCB9 | RWQCB9-San Diego Region |
| SRCSD | Sacramento Regional County Sanitation District |
| SVWQC | Sacramento Valley Water Quality Coalition |
| SRRC | Salmon River Restoration Council |
| SBC | San Bernardino County |
| SDAA | San Diego Airport Authority |
| SDCPUD | San Diego City Public Utilities Department, La Mesa |
| SDCK | San Diego Coastkeeper |
| SDC | San Diego County |
| SDCPHL | San Diego County Public Health Laboratory |
| SDRPF | San Diego River Park Foundation |
| SFEI | San Francisco Estuary Institute |
| SFPUC-WDDNR | San Francisco Public Utilities Commission Water Department Division of Natural Resources |
| SFSU-RTC | San Francisco State University - Romberg Tiburon Center |
| SJVDA | San Joaquin Valley Drainage Authority |
| SJSURF | San Jose State University Research Foundation |
| SLDMWA | San Luis and Delta Mendota Water Authority |
| SLOCPHDEH | San Luis Obispo County Public Health Department Environmental Health |
| SLOCPHDL | San Luis Obispo County Public Health Department Lab |
| SLODPW | San Luis Obispo County Public Works Department |
| SLWD | San Luis Water District |
| SanMarcosCity | San Marcos City |
| SMCRCD | San Mateo County Resource Conservation District |
| SMCWPPP | San Mateo Countyside Water Pollution Prevention Program |
| SARDA | Santa Ana River Dischargers Association |
| SAWPA | Santa Ana Watershed Protection Authority |
| SBCK | Santa Barbara Channelkeeper |
| SBarbC | Santa Barbara City |
| SBCPCW | Santa Barbara County - Project Clean Water |
| SCVURPPP | Santa Clara Valley Urban Runoff Pollution Prevention Program |
| SCVWD | Santa Clara Valley Water District |
| SCC | Santa Cruz City |
| SCCEHS | Santa Cruz County Environmental Health Service |
| SMBBC_CIMP | Santa Monica Bay Beach Cities CIMP Group |
| SMCDPWWD | Santa Monica City Dept of Public Works Water Division |
| SeaWorld | SeaWorld Parks and Entertainment |
| SAL | Sequoia Analytical Laboratories, Inc. |
| SGS AXYS | SGS AXYS Analytical Services Ltd. |
| SVRCD | Shasta Valley Resource Conservation District |
| SHN-Willits | SHN Engineers & Geologists, Inc. - Willits |
| SierraLabs | Sierra Analytical Labs, Inc. |
| SEM | Sierra Environmental Monitoring, Inc. |
| SFL | Sierra Foothill Laboratory, Inc. |
| SNARL | Sierra Nevada Aquatic Research Laboratory |
| SPI-Redding | Sierra Pacific Industries - Redding |
| STL | Sierra Testing Laboratories, Inc. |
| SLKR | Silliker, Inc. |
| SilverState | Silver State Analytical Laboratories, Inc. |
| Siskiyou-RCD | Siskiyou Resource Conservation District |
| SCL | Soil Control Laboratory |
| SolanaBeachCity | Solana Beach City |
| Solano CWA | Solano County Water Agency |
| Solano RCD | Solano Resource Conservation District |
| SSA | Solano Stormwater Alliance |
| SCPRMD | Sonoma County Permit and Resource Management Department |
| SEC | Sonoma Ecology Center |
| SMC | Source Molecular Corporation |
| SDAL | South Dakota Agricultural Laboratories |
| SDSU | South Dakota State University, Olcar E. Olson Biochemical Lab/Analytical Services Lab |
| SSJID | South San Joaquin Irrigation District |
| SoSCCo_RegPartners | South Santa Clara County Regional Partners |
| SYRCL | South Yuba River Citizens League |
| SCAMIT | Southern California Association of Marine Invertebrate Taxonomists |
| SCCWRP | Southern California Coastal Water Research Project |
| SIU | Southern Illinois University |
| SSJWQC | Southern San Joaquin Water Quality Coalition |
| SAFIT | Southwest Association of Freshwater Invertebrate Taxonomists |
| Stantec_SD | Stantec Consulting Services Inc., San Diego Office |
| Stantec_ZC | Stantec Consulting Services Inc., Zephyr Cove Office |
| SFCWA | State and Federal Contractors Water Agency |
| SWRCB | State Water Resources Control Board |
| SRH | Steve Hanson and Associates |
| SWS | Stillwater Sciences |
| SunStar | SunStar Laboratories |
| SLSII | Sustainable Land Stewardship International Institute |
| TRPA | Tahoe Regional Planning Agency |
| TC | Temecula City |
| TestAmerica | Test America Laboratories, Inc. |
| TetraTech | Tetra Tech, Inc. |
| BFMB | The Bay Foundation of Morro Bay |
| MCCCL | The Monterey County Consolidated Chemistry Lab |
| TNC-BIGSPRINGS | The Nature Conservancy Big Springs |
| TNC-KFALLS | The Nature Conservancy Williamson River Delta |
| TSF | The Sierra Fund |
| TWL | The Twining Laboratories, Inc. |
| TA | Thomas Analytical |
| TOCWWTPL | Thousand Oaks City WasteWater Treatment Plant Laboratory |
| TPC | Timber Products Company |
| Torrent | Torrent Laboratory, Inc. |
| TOTALFLOW | Total Flow, Inc. |
| ToxScan | ToxScan |
| TRWC | Truckee River Watershed Council |
| Truesdail | Truesdail Laboratories, Inc. |
| TBWQC | Tule Basin Water Quality Coalition |
| Tule SW | Tule River Sub-Watershed |
| TuolumneRCD | Tuolumne County Resource Conservation District |
| TuolumneRT | Tuolumne River Trust |
| TID | Turlock Irrigation District |
| USBR-SCCAO | U.S. Bureau of Reclamation - SCCAO |
| USBR-CGBRO | U.S. Bureau of Reclamation California-Great Basin Regional Office |
| USBR-KFALLS | U.S. Bureau of Reclamation Klamath Falls |
| USBR-NC | U.S. Bureau of Reclamation Northern California Area Office, NC 312 |
| USBR-TRINITY | U.S. Bureau of Reclamation Trinity |
| USFWS-Arcata | U.S. Fish and Wildlife Service Arcata Fish and Wildlife Office |
| USFWS-Klamath | U.S. Fish and Wildlife Service Klamath Falls Office |
| USFS-AREMP | U.S. Forest Service AREMP |
| USFS-FREMONT-WINEMA | U.S. Forest Service Fremont Winema |
| USFS-KLAMATH | U.S. Forest Service Klamath Butte |
| USFS-MODOC | U.S. Forest Service Modoc |
| USFS-San Bernardino | U.S. Forest Service San Bernardino |
| USFS-SHASTA-TRINITY | U.S. Forest Service Shasta Trinity |
| USFS-SIX-RIVERS | U.S. Forest Service Six Rivers |
| USFS-VALLEJO | U.S. Forest Service Vallejo |
| USGS-KFALLS | U.S. Geological Survey Klamath Falls |
| USGS-CAWSC | U.S. Geological Survey-California Water Science Center |
| USGS-CB | U.S. Geological Survey-Carnelian Bay Field Office |
| USGS-FRESC | U.S. Geological Survey-Forest and Rangeland Ecosystem Science Center |
| USGS-MRL | U.S. Geological Survey-Mercury Research Laboratory |
| USGS-NWQL | U.S. Geological Survey-National Water Quality Laboratory |
| USGS-Scto | U.S. Geological Survey-Water Resources-Sacramento |
| USGS-WERC | U.S. Geological Survey-Western Ecological Research Center |
| UCD-SIF | UC Davis Stable Isotope Facility |
| UCD-AHPL | UC Davis-Aquatic Health Program Laboratory |
| UCSD-SIO | UCSD Scripps Institution of Oceanography Oceanic |
| USD | Union Sanitary District |
| UCSB-MSI | University of California at Santa Barbara Marine Science Institute |
| UCB-WL | University of California Berkeley-Weston Lab |
| UCCE_Monterey | University of California Cooperative Extension Monterey County |
| UCD-ATW | University of California Davis Atwill Lab |
| UCD-GGE | University of California Davis Graduate Group in Ecology |
| UCD-PES | University of California Davis Plant and Environmental Sciences Department |
| UCD-WFCB | University of California Davis Wildlife, Fish and Conservation Biology |
| UCD-WRTZ | University of California Davis Wuertz Lab |
| ZALOM | University of California Davis, Zalom Entomology Laboratory |
| UCD-ALL | University of California Davis-Aquatic Limnology Lab |
| UCD-ATL | University of California Davis-Aquatic Toxicology Lab |
| UCD-BML | University of California Davis-Bodega Marine Laboratory |
| UCD-GC | University of California Davis-Granite Canyon |
| UCD-LAWR | University of California Davis-LAWR |
| UCD-TERC | University of California Davis-Tahoe Environmental Research Center |
| UCD-TATE | University of California Davis-Tate Laboratory |
| UCSB | University of California Santa Barbara |
| UCSB-HOLDEN | University of California Santa Barbara - Holden Laboratory |
| UCSC-CASFS | University of California Santa Cruz - Center for Agroecology and Sustainable Food Systems |
| UCSC-OL | University of California Santa Cruz - Division of Natural Sciences |
| UCSC-DET | University of California Santa Cruz - Environmental Toxicology |
| UCSC-IMS | University of California Santa Cruz - Institute of Marine Sciences |
| UCSC-Shenn | University of California Santa Cruz - Shennan Laboratories |
| UCD-AEAL | University of California-Aquatic Ecoystems Analysis Laboratory |
| UCOB | University of Colorado Boulder |
| UGA | University of Georgia Atlanta |
| UIASL | University of Idaho Analytical Science Laboratory |
| UM-CES | University of Maryland Center for Environmental Science |
| UM-AGNR | University of Maryland, College of Agriculture and Natural Resources |
| UM-HPEL | University of Maryland, Horn Point Environmental Laboratory |
| UU-EGI | University of Utah, Energy and Geoscience Institute |
| UFRWG | Upper Feather River Watershed Group |
| UMRWC | Upper Merced River Watershed Council |
| USLT_RCD | Upper Salinas-Las Tablas Resource Conservation District |
| URS | URS Corporation |
| USGS-PFRG-OCRL | US Geological Survey-Pesticide Fate Research Group (PFRG), Organic Chemistry Research Laboratory (OCRL) |
| USU-WCMAFE | Utah State University WCMAFE |
| VSFCD | Vallejo Sanitation and Flood Control District |
| VCPWA | VCPWA-County Stormwater Program |
| VCEHD | Ventura County Environmental Health Division |
| VCHCA | Ventura County HCA Laboratories |
| VCSQMP | Ventura County Stormwater Quality Monitoring Program |
| VCWPD | Ventura County Watershed Protection District |
| VESTRA | VESTRA Resources, Inc. |
| VCE | Visalia City Engineering |
| VAL | Vista Analytical Laboratory |
| VistaCity | Vista City |
| DFW-WPCL | Water Pollution Control Lab - DFW |
| WKL | Weck Laboratories, Inc. |
| WCILP | Westcoast Coalition for Irrigated Lands Program |
| WETLAB | Western Environmental Testing Laboratory |
| WSRCD | Western Shasta RCD |
| WSC | Westlands Stormwater Coalition |
| WWD | Westlands Water District |
| WestonSolu | Weston Solutions |
| WSJRWC | Westside San Joaquin River Watershed Coalition |
| WWQC | Westside Water Quality Coalition |
| WLDC | Wildomar City |
| WRS | Willamette Research Station |
| WFI | Windset Farms, Inc. |
| WCCA | Wolf Creek Community Aliance |
| WoodAquaticTox | Wood Aquatic Toxicology Laboratory |
| WoodGroup | Wood Group, Inc. |
| WoodMolec | Wood Molecular Services Lab |
| WoRMS | World Register of Marine Species |
| WSPAquaticToxSD | WSP Aquatic Toxicology Laboratory San Diego |
| WSP_SD_MSL | WSP San Diego Molecular Services Laboratory |
| WSP_SD_SkyPkwy | WSP San Diego Sky Parkway |
| Zone7 | Zone 7 Water Agency |