Increased in rainfall raises the likelihood of combined sewage overflows

Number of CSOs

Number of CSOs +35%

Total rainfall, mm

The additional 35% weights for the three out of five water companies that don’t report CSOs during non-bathing season

600

400

200

0

O

N

D

J

2020

F

M

A

M

J

J

A

S

Number of CSOs

Number of CSOs +35%

Total rainfall, mm

Non-bathing season

Bathing season

600

The additional 35% weights for the three out of five water companies that don’t report CSOs during non-bathing season

400

200

0

Oct

Nov

Dec

Jan 2020

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep