About this Dataset

Surface Water - Chemistry Results

This data provides results from the California Environmental Data Exchange Network (CEDEN) for field and lab chemistry analyses. The data set contains two provisionally assigned values (“DataQuality” and “DataQualityIndicator”) to help users interpret the data quality metadata provided with the associated result.

Due to file size limitations, the data has been split into individual resources by year. The entire dataset can also be downloaded in bulk using the zip files on this page (in csv format or parquet format), and developers can also use the API associated with each year's dataset to access the data.

Users who want to manually download more specific subsets of the data can also use the CEDEN Query Tool, which provides access to the same data presented here, but allows for interactive data filtering.

NOTE: Some of the field and lab chemistry data that has been submitted to CEDEN since 2020 has not been loaded into the CEDEN database. That data is not included in this data set (and is also not available via the CEDEN query tool described above), but is available as a supplemental data set available here: Surface Water - Chemistry Results - CEDEN Augmentation. For consistency, many of the conditions applied to the data in this dataset and in the CEDEN query tool are also applied to that supplemental dataset (e.g., no rejected data or replicates are included), but that supplemental data is provisional and may not reflect all of the QA/QC controls applied to the regular CEDEN data available here.
Organization: State of California
Last updated: 2025-10-23T12:52:21.365815
Tags: assessment, benthic, bioassessment, bivalves, ceden, contaminant, fish, monitoring, organisms, pollutant, sediment, surface-water, taxonomy, water-quality, water-quality-monitoring

Tables

CEDEN Water Chemistry Data Prior To 2000

@usgov.ca_gov_surface_water_chemistry_results.ceden_water_chemistry_data_prior_to_2000

22.41 MB
1,334,873 rows
79 columns

2000 CEDEN Water Chemistry Data

@usgov.ca_gov_surface_water_chemistry_results.n_2000_ceden_water_chemistry_data

3.05 MB
204,877 rows
79 columns

2001 CEDEN Water Chemistry Data

@usgov.ca_gov_surface_water_chemistry_results.n_2001_ceden_water_chemistry_data

4.76 MB
277,868 rows
79 columns

2002 CEDEN Water Chemistry Data

@usgov.ca_gov_surface_water_chemistry_results.n_2002_ceden_water_chemistry_data

8.08 MB
401,629 rows
79 columns

2003 CEDEN Water Chemistry Data

@usgov.ca_gov_surface_water_chemistry_results.n_2003_ceden_water_chemistry_data

9.21 MB
454,310 rows
79 columns

2004 CEDEN Water Chemistry Data

@usgov.ca_gov_surface_water_chemistry_results.n_2004_ceden_water_chemistry_data

8.66 MB
428,691 rows
79 columns

2005 CEDEN Water Chemistry Data

@usgov.ca_gov_surface_water_chemistry_results.n_2005_ceden_water_chemistry_data

12.03 MB
564,397 rows
79 columns

2006 CEDEN Water Chemistry Data

@usgov.ca_gov_surface_water_chemistry_results.n_2006_ceden_water_chemistry_data

10.4 MB
522,557 rows
79 columns

2007 CEDEN Water Chemistry Data

@usgov.ca_gov_surface_water_chemistry_results.n_2007_ceden_water_chemistry_data

11.86 MB
578,951 rows
79 columns

2008 CEDEN Water Chemistry Data

@usgov.ca_gov_surface_water_chemistry_results.n_2008_ceden_water_chemistry_data

16.14 MB
822,983 rows
79 columns

2009 CEDEN Water Chemistry Data

@usgov.ca_gov_surface_water_chemistry_results.n_2009_ceden_water_chemistry_data

12.21 MB
512,112 rows
79 columns

2010 CEDEN Water Chemistry Data

@usgov.ca_gov_surface_water_chemistry_results.n_2010_ceden_water_chemistry_data

15.25 MB
603,024 rows
79 columns

2011 CEDEN Water Chemistry Data

@usgov.ca_gov_surface_water_chemistry_results.n_2011_ceden_water_chemistry_data

16.64 MB
642,356 rows
79 columns

2012 CEDEN Water Chemistry Data

@usgov.ca_gov_surface_water_chemistry_results.n_2012_ceden_water_chemistry_data

19.92 MB
944,897 rows
79 columns

2013 CEDEN Water Chemistry Data

@usgov.ca_gov_surface_water_chemistry_results.n_2013_ceden_water_chemistry_data

21.66 MB
1,044,884 rows
79 columns

2014 CEDEN Water Chemistry Data

@usgov.ca_gov_surface_water_chemistry_results.n_2014_ceden_water_chemistry_data

21.12 MB
949,522 rows
79 columns

2015 CEDEN Water Chemistry Data

@usgov.ca_gov_surface_water_chemistry_results.n_2015_ceden_water_chemistry_data

18.93 MB
997,893 rows
79 columns

2016 CEDEN Water Chemistry Data

@usgov.ca_gov_surface_water_chemistry_results.n_2016_ceden_water_chemistry_data

22.15 MB
1,195,250 rows
79 columns

2017 CEDEN Water Chemistry Data

@usgov.ca_gov_surface_water_chemistry_results.n_2017_ceden_water_chemistry_data

23.02 MB
898,346 rows
79 columns

2018 CEDEN Water Chemistry Data

@usgov.ca_gov_surface_water_chemistry_results.n_2018_ceden_water_chemistry_data

22.31 MB
762,879 rows
79 columns

2019 CEDEN Water Chemistry Data

@usgov.ca_gov_surface_water_chemistry_results.n_2019_ceden_water_chemistry_data

17.95 MB
605,151 rows
79 columns

2020 CEDEN Water Chemistry Data

@usgov.ca_gov_surface_water_chemistry_results.n_2020_ceden_water_chemistry_data

8.38 MB
286,017 rows
79 columns

2021 CEDEN Water Chemistry Data

@usgov.ca_gov_surface_water_chemistry_results.n_2021_ceden_water_chemistry_data

10.95 MB
516,836 rows
79 columns

2022 CEDEN Water Chemistry Data

@usgov.ca_gov_surface_water_chemistry_results.n_2022_ceden_water_chemistry_data

9.93 MB
479,916 rows
79 columns

2023 CEDEN Water Chemistry Data

@usgov.ca_gov_surface_water_chemistry_results.n_2023_ceden_water_chemistry_data

11.15 MB
538,847 rows
79 columns

2024 CEDEN Water Chemistry Data

@usgov.ca_gov_surface_water_chemistry_results.n_2024_ceden_water_chemistry_data

6.33 MB
242,099 rows
79 columns

2025 CEDEN Water Chemistry Data

@usgov.ca_gov_surface_water_chemistry_results.n_2025_ceden_water_chemistry_data

1.05 MB
68,150 rows
79 columns