Why You Shouldn’t Throw Yard Waste and Trash in Drainage Ditches and Storm Drains

HCMUD 0712026-09-30T11:14:54-05:00September 30, 2026|

Storm drains and drainage ditches throughout the community are designed to carry stormwater runoff from rainfall, not trash or yard debris. What many people don’t realize is that stormwater runoff flows into neighborhood lakes, detention ponds, drainage channels, and local bayous without treatment. That means materials dumped or washed into storm drains or ditches can be carried into the water we share with our neighbors and local wildlife.

Materials that could potentially be harmful to our waterways include grass clippings, leaves, soil, mulch, fertilizer, household chemicals, motor oil, paint, litter, and other waste that should never enter the stormwater system. Even small amounts of pollution and debris can have a big impact.

Importantly, it is a violation of HCMUD 71’s Rate Order to dispose of unauthorized chemical or materials in the storm drainage system. Violations of the Rate Order are subject of fines of up to $20,000 per violation.

Trash and Yard Waste Can Pollute Our Lakes and Cause or Worsen Flooding

When yard debris and other waste enter the stormwater system, they may release harmful pollutants and excessive nutrients into the water that can lead to:

• Algae blooms, which rob water of oxygen and harm fish and aquatic life
• Elevated bacteria levels, increasing the risk of illness for people and animals
• Cloudy water, foul odors, and an overall decline in water quality
• Contaminated runoff, as fertilizers and pesticides cling to organic debris

These effects are especially noticeable in detention ponds and neighborhood lakes, where the water is relatively still. Polluted runoff harms the beauty, safety, and health of these shared spaces.

Additionally, when debris and materials are placed into drainage ditches, they can impede the flow of storm water which may cause or worsen flooding in nearby areas.

What You Can Do

• Keep yard waste out of the street and ditch areas
• Use a mulching mower or bag or bundle yard waste for proper disposal
• Avoid using chemicals before heavy rain, and store them properly to avoid spills
• After applying pesticides or fertilizer, sweep and collect any excess off hard surfaces, and water it into the soil
• Secure items intended for trash and recycling pickup

Everyone Has a Role

Lakes, detention ponds, and green spaces are part of what makes the HCMUD 71 community a great place to live. Protecting them is a shared responsibility, and it begins in our own yards.

Clean water and flood prevention start with small actions at home. By keeping trash, yard clippings, and chemicals out of the stormwater system, residents can help preserve the health of our lakes and detention ponds and help reduce the risk of flooding issues.

Protecting Storm Drains from Yard Chemicals

HCMUD 0712026-09-23T12:04:44-05:00September 23, 2026|

Many residents use fertilizers, weed killers, pesticides, and other lawn products to maintain their yards and landscaping. When used properly, these products can support healthy turf and plants. However, when yard chemicals are overapplied, spilled, or washed into the street, they can enter the storm drainage system and affect nearby waterways.

Storm drains are designed to collect rainwater runoff from streets, sidewalks, driveways, and yards. Unlike wastewater from sinks, showers, and toilets, stormwater is not treated at a wastewater treatment facility before it moves through the drainage system. In many cases, runoff travels through storm sewer pipes, ditches, swales, detention ponds, and regional drainage channels before reaching local bayous and creeks.

Anything left on hard surfaces or carried by runoff can move with stormwater. Fertilizer granules, herbicides, pesticides, and other lawn chemicals can be washed from driveways, sidewalks, curbs, and streets into storm drains during rainfall or irrigation runoff. Even small amounts can contribute to algae growth, affect aquatic life, or create potentially hazardous chemical buildup in ponds and drainage areas.

In order to protect our area waterways, it is a violation of HCMUD 71’s Rate Order to dispose of unauthorized chemicals or materials in the storm drainage system. Violations of the Rate Order are punishable by fines of up to $20,000 per violation.

How Can You Help?

Residents can reduce the risk by applying lawn products carefully and only as directed on the label. More product does not mean better results, and overapplication can harm plants, waste money, and increase the chance that chemicals will wash away before they are absorbed.

Additionally, avoid applying fertilizers, herbicides, or pesticides before heavy rain is expected as they will likely be washed into the storm drains.

After applying yard products, residents should sweep any excess granules or material off sidewalks, driveways, and curbs and back onto the lawn or landscape bed where they can be properly watered into the soil. Do not rinse these materials into the street with a hose, as that sends them directly toward the storm drainage system.

Proper storage matters as well. Lawn chemicals should be kept in sealed containers, stored in a covered area, and protected from rain. Spills should be cleaned up promptly according to the product label, and unused or unwanted chemicals should be disposed of according to local household hazardous waste guidance rather than poured outside or into a drain.

HCMUD 71 encourages residents to be mindful of how yard chemicals are used and stored. Small habits, such as checking the forecast, applying only what is needed, sweeping hard surfaces after application, and keeping materials out of storm drains, can help protect detention ponds, drainage channels, and the waterways downstream.

By using lawn products responsibly, residents can maintain attractive yards while helping protect the water resources that serve the broader Katy area.