Grass Clippings and Storm Drains don’t mix!

A message from the Town of Vinton Planning and Zoning Department

With summertime weather comes the mowing season. It is important to remember not to blow grass clippings into the street. Grass clippings in the street ultimately end up in a storm drain where they can build up and cause drainage issues and localized flooding.  Grass clippings blown into the street can also create hazardous conditions for drivers, motorcyclists, and bicyclists.

Yard debris, including leaves and other organic plant material like shrubbery trimmings and grass clippings, are a significant source of stormwater pollution.

Did you know that storm drains are not connected to the sanitary sewer systems and treatment plants? There is no treatment to remove the debris from the water before it reaches nearby lakes, streams, or our Roanoke River. The primary purpose of storm drains is to carry rainwater away from developed areas to prevent flooding.

When you blow your lawn waste into the street, it can clog storm drains and cause drainage and flooding issues by clogging curb inlets and pipes, which can cause water to back up and flood within the drainage system or the creek.

Why are grass clippings and leaf litter harmful?  When yard waste is discarded within the stormwater drainage system, it will decompose. Decomposing yard waste can supercharge the creek with nutrients such as nitrogen and phosphorus, causing algae blooms resulting in low dissolved oxygen.

When yard waste is discarded within the stormwater drainage system, it can bring harmful chemicals into the creek, including fertilizers, pesticides, and herbicides. While these chemicals can be used to protect grass, they will harm aquatic life and cause additional adverse effects to water quality when released into streams.

What is so bad about algae?

Algae, the nutrient that turns lakes green, will naturally occur in lakes and ponds, but excess nutrients can lead to high levels of algae growth.

Apart from looking unsightly, excessive algae blooms can block out sunlight, and severely low dissolved oxygen levels in creeks can cause fish kills. According to the U.S. EPA, phosphorus is one of the most troublesome pollutants in stormwater runoff and it is considered the primary cause of water quality problems in our waters. It also leads to unwanted and uncontrolled growth of algae and native and non-native aquatic weeds.  One bushel of fresh grass clippings can contain 0.1 lbs. of phosphorus—enough to produce 30-50 pounds of algae growth if it finds its way to a lake or river!

What can you do to protect water quality while keeping your yard maintained?

  • If your mower shoots grass clippings out of the side, mow a couple of passes with your mower blowing towards your yard and not the street before mowing the rest of your yard.
  • If you bag grass with your mower, make sure you keep the clippings out of the street, curb inlet, ditch, or creek.
  • If you mulch mow, your mower will not blow grass out the side, and you shouldn’t have to worry about grass blowing into the street.
  • Mow when your lawn needs it, not on a fixed schedule. Mow your lawn often enough so no more than one-third the length of the grass is removed. Taller grass has deeper roots that prevents soil loss and helps the rain soak into the ground. Lawns mowed higher withstand heat stress better, need less watering, and are more resilient, reducing bare spots and soil erosion.
  • Sharpen mower blades every 1 to 3 years.
  • Leave the clippings on the lawn to improve the health of the lawn itself or compost them. According to the U.S. EPA, leaving your grass clippings on the lawn doesn’t cause thatch buildup. Grass clippings are about 90 percent water, so they decompose very quickly. Leaving grass clippings in place leaves the equivalent of 1 pound of nitrogen per 1,000 ft²–the same amount you would get from one fertilizer application. Be sure to sweep or blow clippings off paved surfaces and back onto the lawn.
  • Mix grass clippings with leaves and soil to make a backyard compost pile. Intentionally blowing or placing lawn waste in the street is a violation of the Vinton Town Code dealing with illicit discharges to the Town storm sewer system. There is no excuse for sweeping grass and/or leaves into the storm drains or waterways.
  • Fertilize only when necessary, or not at all if it might rain in the next day or two. Keeping grass clippings on your yard can save money on fertilizer by returning nutrients back into the soil and save money on watering by building organic matter in your soil. With grass recycling, use of fertilizers can be reduced by 30-40% or more! In the fall, place leaves for municipal collection along the curb–NOT IN THE STREET.
  • Clean up after your pets. Scoop up pet waste and put it in the trash. People often believe that leaving dog waste to decompose in the yard is good for the lawn, but the truth is that dog poop is toxic for your grass. Unlike cow manure, which is basically composted grass, a typical dog’s poop, which is made acidic through natural digestive processes and their microbiome, is enough to destroy the grass underneath it. For this reason, dog poop also shouldn’t be placed in your compost or used to fertilize your garden. In either case, it contains bacteria that could contaminate your vegetables. Dog waste that gets washed into waterways may carry pathogens that affect living things in the water and can make people sick that are in contact. Also, nutrients released from dog poop can stimulate the growth of algae and other plant life, making the water unsuitable for recreational uses. Dog waste could contain bacteria and parasites that are harmful to other pets and humans.
  • Only use dry cleanup methods (broom and dustpan or absorbent material) for spills of chemicals or fuels; never hose a spill into a storm drain!
  • Directing your roof drains to a rain garden can significantly reduce the stormwater runoff from your property.

Presently, the Town effectively prohibits discharge of yard wastes to the storm drain system and drainage-ways through the use of enforceable regulations, specifically the Stormwater Ordinance, Chapter 79, Article III, Division 3 Section 79-77 (a) (b) (5) which state:

(a) It shall be unlawful and a violation of this article to allow any discharge that is not composed entirely of stormwater, except as described in subsection (c) below, that enters, or has the potential of entering, the MS4.

(b) Illicit discharges include, but are not limited to:

  • Discharging, or causing or allowing to be discharged, sewage, industrial wastes, yard wastes, or other wastes, into the storm sewer system, or any component thereof, or onto driveways, sidewalks, parking lots, the ground, or any other areas draining to the storm sewer system.
  • Connecting, or causing or allowing connection of any sanitary sewer to the storm sewer system, including any sanitary sewer connected to the storm sewer as of the date of the adoption of the ordinance from which this article derives.
  • Connecting, or causing or allowing any connection to the storm sewer system, without a valid VSMP, VPDES, or NPDES permit, any structure that conveys any liquid other than stormwater or discharges listed in subsection (c), including, but not limited to, pipes, drains, sanitary sewer lines, washing machine drains, or floor drains.
  • Prohibitions (2) and (3) listed in this subsection expressly include, without limitations, illicit connections made in the past, regardless of whether the connection was permissible under law or practices applicable or prevailing at the time of the connection.
  • Throwing, placing, or depositing, or causing to be thrown, placed, or deposited in the storm sewer system anything that impedes or interferes with the free flow of stormwater therein, or adversely affects water quality.”

Additionally, Chapter 79, Article III, Division 5 Section 79-79 -Violations; penalties and remedies states:

(a) Any person who violates any of the provisions of this article shall be guilty of a Class I misdemeanor and, upon conviction, is subject to punishment by a fine of not more than $2,500.00 per violation per day and confinement in jail for not more than 12 months, either or both.

(b) Each day during which a violation of this article occurs or continues shall be deemed a separate and distinct violation of this article.

(c) Any person who commits any of the acts prohibited by this article or violates any of the provisions of this article shall be liable to the town for all costs of testing, containment, cleanup, abatement, removal, disposal, and any other related costs or expenses that the town may incur in connection with the enforcement of this article and/or the prohibition and/or correction of a violation of this article.

(d) The administrator and/or his/her authorized agent may bring legal action to enjoin a violation of this article and the existence of any other remedy shall be no defense to any such action.

(e) In addition to any of the remedies set forth above, the administrator and/or his/her authorized agent may seek to impose, or have imposed by the appropriate authority, any of the remedies provided for by § 62.1-44.15:48, Code of Virginia (1950), as amended, which are incorporated herein by reference.

(f) In any court action that may result from enforcement of this article, a judge hearing the case may direct the person responsible for the violation or the property owner to correct the violation and each day that the violation continues shall constitute a separate violation of this article.

(g) Any person who knowingly makes any false statements, representations, or certifications in any record, report, or other document, either filed or requested pursuant to this ordinance, or who falsifies, tampers with, or knowingly renders inaccurate any monitoring device or method required or used by the administrator and/or his/her authorized agent under this article in monitoring discharges, shall be guilty of a violation of this article.

(h) The remedies set forth in this section shall be cumulative, not exclusive, and it shall be no defense to any action that one or more of the remedies set forth in this section has been sought or granted.

We appreciate your cooperation in maintaining the quality of our Town’s water by practicing appropriate yard waste disposal methods. Failure to comply with this may result in a citation or additional enforcement action. Town of Vinton residents can play a big part in keeping our lakes and creeks clean and healthy.

Want to know more?

  • Visit the Town of Vinton’s Stormwater page at:
  • Or contact: Vinton Planning and Zoning, 311 S. Pollard Street, Vinton, VA 24179 / phone: 540-983-0605.

For more information visit the Town of Vinton’s Stormwater page at: or contact Vinton Planning and Zoning, at 311 South Pollard in Vinton, or phone 540-983-0605.

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