Worldwide wastewater treatment observatory · 
United States · California
Aguas SB Observatory · public data to understand water
WWTP Watsonville WWTF
Watsonville · official identifier CWNS2022_06003044001
12MGD reported design flow (2022) · 722nd of 15,772 (tied with 62 others)
EPA Clean Watersheds Needs Survey 2022 · official identifier CWNS2022_06003044001 · reported size 12 MGD reported design flow · reported treatment: Advanced · data year 2022. 722nd of 15,772 records with reported size in the inventory of United States (tied with 62 others); 0.02 % of the sum of those 15,772 records in MGD (sum of records, not national capacity); nearest inventoried plant at 18.7 km. Reported data with their source; estimates are not measurements of the plant.
Aguas SB does not manage this wastewater treatment plant.
WHAT THE DATA REPORT
Reported data official data · 2022
| Treatment | Advanced · reported levels |
|---|---|
| Reported coordinates | 36.8870, -121.7851 precision reported by the source: 4 m what it means |
| Source and year | EPA Clean Watersheds Needs Survey 2022 · dataset record |
REGULATORY REFERENCES
Referencia normativa: United States
Regulatory framework of United States. Individual applicability is not determined in this profile.
NEARBY PLANTS
Nearby wastewater treatment plants
| Plant | Distance | MGD reported design flow | Treatment |
|---|---|---|---|
| Monterey One Water (Regional WWTP and Advanced Water Purification Facility) | 18.7 km | 29.6 | Advanced |
| SAN JUAN BAUTISTA WWTF | 21.8 km | 0.27 | Advanced |
| SANTA CRUZ WWTF | 23.3 km | 17 | Secondary |
| South County Regional Wastewater Treatment and Reclamation Facility | 25.0 km | 9 | Advanced |
| SCOTTS VALLEY WWTF | 27.5 km | 1.5 | Secondary |
Distances are between reported coordinates; proximity does not establish a hydraulic connection.
QUESTIONS
Frequently asked questions about this plant
What capacity does WWTP Watsonville WWTF report?
Reported size: 12 MGD reported design flow. Units are retained without conversion.
What treatment is reported?
Treatment Advanced. Nitrogen, phosphorus and UV are shown only when explicitly reported.
SOURCE AND CORRECTIONS
Source
reported data · EPA Clean Watersheds Needs Survey 2022 · data 2022 · edition 2022 · source licence: Public domain (EPA geospatial default; see LICENCIA.txt) · JSON for this plant · suggest a correction · catalogue 2026-11-06. Reported data, not a current inspection; no compliance judgements.