Stormwater Treatment

Stormwater treatment is evolving as a means to protect the natural environment. As councils treat the stormwater from new roading works, so industry must play its part and improve stormwater from its own sites.

Even the best run industrial plant will have some impact on the local environment. This might be from the tracking of contaminants on vehicle wheels to oil loss from vehicles on the site. To continually reduce point and non-point source pollution stormwater treatment is increasingly a requirement for industry.

This is usually a treatment train that includes:

• Source control – the exclusion of process contaminants from stormwater
• Stormwater displacement – keeping stormwater out of dirty areas
• Stormwater treatment devices around the site or at the final discharge point – interceptors, sandfilters, swales, wetlands…

There is often a tension between sending large volumes of stormwater to the sewer and the sewer capacity to receive this. IWS specialises in reducing contaminated stormwater and controlled release to the sewer – with the associated council negotiations and consents.

In-ground stormwater sandfilter after construction

Stormwater swale after construction