Worldwide wastewater treatment observatory · 
United States · California
Aguas SB Observatory · public data to understand water
WWTP Willits WWTF
Willits · official identifier CWNS2022_06001027001
7MGD reported design flow (2022) · 1207th of 15,772 (tied with 44 others)
EPA Clean Watersheds Needs Survey 2022 · official identifier CWNS2022_06001027001 · reported size 7 MGD reported design flow · reported treatment: Advanced · data year 2022. 1207th of 15,772 records with reported size in the inventory of United States (tied with 44 others); 0.01 % of the sum of those 15,772 records in MGD (sum of records, not national capacity); nearest inventoried plant at 24.8 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 | 39.4181, -123.3465 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 |
|---|---|---|---|
| CALPELLA WWTP | 24.8 km | 0.04 | Secondary |
| Ukiah WWTF | 36.6 km | 3.01 | Advanced |
| Fort Bragg WWTP | 40.3 km | 1 | Secondary |
| Mendocino City WWTF | 41.5 km | 0.31 | Advanced |
| Covelo WWTP | 41.8 km | 0.1 | Secondary |
Distances are between reported coordinates; proximity does not establish a hydraulic connection.
QUESTIONS
Frequently asked questions about this plant
What capacity does WWTP Willits WWTF report?
Reported size: 7 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.