How Often Should You Change Your Storm Drain Filters?

Six signs that it's time to replace your storm drain filter

Storm drain filters defend against pollutants to ensure only clean water flows into water systems Storm drain filters are the easy solution for keeping waste out of the water system. However, like any filtration system, they only work their best for so long before you need to replace them. Regularly changing your storm drain filters is not only essential for preserving water quality but also aligns with the Environmental Protection Agency's EPA storm water pollution prevention guidelines. Because without effective filtration, contaminants can enter storm drains and eventually reach rivers, lakes, and oceans. Take a look at these six telltale signs that it’s time to replace your storm drain filter.

1. Sediment buildup

If there is a quarter-inch or more of sediment buildup, your filter insert most likely needs to be replaced.

2. Debris around the storm drain

Accumulation of large debris, such as trash, might just mean that the drain filter needs to be cleaned. But always keep an eye out for any other signs that it needs replacing.

3. Standing water

When four inches (or more) of standing water persists around the drain for 24 hours or longer after rainfall, it's a sure sign that your storm drain filter requires maintenance. Or replacing.

4. Hazardous material discharge

If any hazardous material that the filter is designed to absorb—like motor oil—is being discharged by the filter, it’s ready for a replacement.

5. Visible scum

It’s time to replace the filter if there is a visible line of scum building up around it. This is usually a sign of recurring standing water.

6. Three years

Regardless of the apparent condition or state of the filter, if three years have passed without it being replaced, it’s time for a new one!

Shop storm drain filters and more at AbsorbentsOnline

We have three different storm drain guard filter models available, so you will be sure to find one that suits your specific facility needs. Check them out on our website. Always familiarize yourself with your Storm Drain Filter Inspection and Maintenance Guide. You can also learn more tips and best practices for storm water management in our previous posts:

• Save the Environment with Smart Stormwater Runoff Practices
• Keep Runoff Away With Stormwater Management Gear
• What to Include in Your Facility’s Storm Water Pollution Prevention Plan (SWPPP)

This is a revision to a blog post with an original publication date of August 9, 2016.