If 2,367 gallons of sewage overflow and only 2,200 gallons are captured, what category SSO is this?

The classification of Sanitary Sewer Overflows (SSOs) is based on the volume of sewage overflow and the amount that is recovered or captured. In this scenario, a total of 2,367 gallons of sewage overflowed, but only 2,200 gallons were captured, which means there is a loss of 167 gallons.

Category 1 SSOs are defined as those where the total volume of the overflow is less than 1,000 gallons and all of the overflow is captured; however, in this case, since the total overflow exceeds that threshold, it is important to consider the overall category structure.

Category 2 SSOs typically involve spills between 1,000 gallons and 10,000 gallons with some portion captured. Since the total gallons overflowed here (2,367) fits this range and reflects that not all overflow was captured, this scenario qualifies as a Category 2 SSO.

Thus, the correct classification for this scenario is Category 2, not Category 1. Understanding the volume of wastewater spilled in relation to what was captured is vital in determining the appropriate category of SSO.