WWTP St. Chas. Miss. River STP

Saint Charles · official identifier CWNS2022_29001021002

9.63MGD reported design flow (2022) · 935th of 15,772

EPA Clean Watersheds Needs Survey 2022 · official identifier CWNS2022_29001021002 · reported size 9.63 MGD reported design flow · reported treatment: Advanced · data year 2022. 935th of 15,772 records with reported size in the inventory of United States; 0.02 % of the sum of those 15,772 records in MGD (sum of records, not national capacity); nearest inventoried plant at 9.1 km · 1 within 10 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

9.63MGD reported design flow

935th of 15,772by reported size among the 15,772 records with a size in the inventory · 0.02 % of the sum of those records (sum of records, not national capacity) · the largest plants in the country · how it is calculated

Treatment	Advanced · reported levels
Reported coordinates	38.8763, -90.5193 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.

LOCATION

Missouri: this plant on the map

this plant on the map · regional directory.

NEARBY PLANTS

Nearby wastewater treatment plants

Plant	Distance	MGD reported design flow	Treatment
St. Chas MO River STP	9.1 km	7.54	Advanced
Spencer Creek STP	11.2 km	9.5	Advanced
Missouri River WWTP	14.7 km	38	Advanced
O'Fallon STP	15.8 km	11.25	Advanced
Portage Des Sioux WWTP	16.2 km	0.06	Advanced

Distances are between reported coordinates; proximity does not establish a hydraulic connection.

QUESTIONS

Frequently asked questions about this plant

What capacity does WWTP St. Chas. Miss. River STP report?

Reported size: 9.63 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.