Water Quality - Effluent - Electronic Self-Monitoring Report (eSMR) Data

Wastewater discharges are regulated by the Water Board. Those regulated are generally required to submit Self-Monitoring Reports to the State or Regional Water Board. Some dischargers submit their reports through the electronic Self-Monitoring Report (eSMR) module of the California Integrated Water Quality System (CIWQS). Generally these are for discharges into surface waters regulated by an individual National Pollutant Discharge Elimination System (NPDES) permit, though other dischargers may be included in this dataset as well. This dataset are the monitoring results that have been submitted as data points after the submitters have been approved for electronic submittals (i.e. after the "all electronic date").

Note that this dataset does not include records where the sampling date falls outside of the years shown below. The excluded records include: records where the sampling date is missing, records where the sampling date is invalid (e.g., records with sampling dates in the future or unreasonably far in the past), and records for samples taken prior to year 2006. The excluded records represent approximately 0.1% of all records in the complete eSMR dataset.

Data and Resources

Additional Info

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Field Value
Public Access Level Public
Rights No restrictions on public use
Program Contact Name State Water Resources Control Board, Office of Information Management and Analysis
Program Contact Email [email protected]
Homepage URL https://www.waterboards.ca.gov/water_issues/programs/ciwqs/chc_npdes.html
Frequency Monthly
Temporal Coverage

Varies, depending on facility and when it was approved for electronic submittals
Granularity Sampling event of a regulated discharge
Geographic Coverage Location Statewide
Language English
Related Resources

https://data.ca.gov/dataset/surface-water-water-quality-regulated-facility-information
Last Updated April 2, 2024, 22:10 (UTC)
Created September 9, 2021, 21:59 (UTC)