Combined Sewer Overflow Update

Real Time Combined Sewer Overflow Monitoring

The table below reflects the current operational status of the Combined Sewer Overflow (CSO) monitoring sites in the City of Spokane. As of January 1, 2023 there are 20 monitoring sites. If a site is flashing, that represents that a CSO overflow event is occurring or has occurred in the last 48 hours. The date and time listed is the start time of the overflow event and will automatically shut off after 48 hours.

All residents and visitors to the area, as a precaution, should avoid water contact sports and activities (ie. swimming, boating, fishing, etc...) during rainfall and snowmelt conditions that result in a discharge (CSO overflow) as observed in the field or as indicated on the table below.

Also, residents can help locate and solve sewer system problems by calling (509) 344-FISH whenever they observe a discharge from the CSO pipe to the river (especially during the summer months). Just make sure to note the CSO two (2) digit number on the sign located next to the outfall pipe so City staff will know exactly where the overflow occurred. The City will then confirm whether the discharge is from a combined sewer system or stormwater system.

CSO #	OUTFALL LOCATION	STATUS	OVERFLOW DATE & TIME
CSO2	0.6 miles downstream of RPWRF Map	IS	none
CSO6	0.25 miles upstream of RPWRF Map	IS	none
CSO7	0.5 miles upstream of RPWRF Map	IS	none
CSO10	At T.J.Meenach Bridge Map	IS	none
CSO12	At T.J.Meenach Bridge Map	IS	none
CSO14	2.0 miles upstream of T.J.Meenach Bridge Map	IS	none
CSO15	2.5 miles upstream of T.J.Meenach Bridge Map	IS	none
CSO16	1 mile downstream of Monroe St. Dam Map	IS	none
CSO19	At High Bridge (East Side) Map	IS	none
CSO23-1	0.3 miles downstream of Monroe St. Bridge Map	IS	none
CSO24-1	0.3 miles downstream at Monroe St. Bridge Map	IS	none
CSO25	0.3 miles downstream of Monroe St. Bridge Map	IS	none
CSO26	At Monroe St Bridge Map	IS	none
CSO33-1	0.1 miles upstream of J.Keefe Bridge Map	IS	none
CSO33-2	0.1 miles upstream of J.Keefe Bridge Map	IS	none
CSO34-1	South of Trent Bridge Map	IS	none
CSO38-1	0.25 miles upstream of Mission Map	IS	none
CSO41	0.5 miles upstream of Greene Map	IS	none
CSO42	1.1 miles upstream of Greene Map	IS	none
RPWRF Bypass	At RPWRF Map	IS	none

Flow monitoring equipment is subject to periodic malfunctions due to debris which may foul the sensors. The event table above is subject to revision and is for informational purposes only. Official verification of actual overflow frequency, duration, and volume is available in the monthly overflow reports.