Short answer: Clean up dry first. Put tarps under every station, cover nearby storm drains, then sweep and bag dry powder as trash before using any water. No hoses or pressure washers on paving unless all the water is collected for the sanitary sewer, with approval, even if the label says biodegradable. Finish the same day, before rain. At home, shake clothes out dry, brush hair dry, then wash colored clothes separately in cold water.
Color run cleanup has one rule that matters more than the rest: get the dry powder up before any water touches it. This page explains why, what one state environmental agency requires of color events, how to treat each surface, how to staff and supply the crew, and how to get powder out of clothes, hair, skin and cars. Agree the cleanup standard with your facilities staff in writing before you order powder, so everyone knows what "clean" means.
The dry-first rule and why it works
Color powder is mostly starch with dye. Dry, it sweeps and shakes off. Wet, it becomes a colored paste that sinks into porous surfaces, and the dye can run off toward storm drains. One powder supplier's FAQ, hosted by Coolum State School in Queensland, says dry powder won't stain but that the dye is likely to temporarily stain skin, hair and clothes once it meets water or sweat. The same reasoning applies to concrete and walls.
So the order is always the same:
- Prevent. Tarps under every station, drains covered, doors and windows closed, cars moved.
- Collect dry. Fold tarps inward and pour the powder into trash bags. Sweep hard surfaces with brooms into piles and bag them.
- Bag as trash. Tie the bags and put them in the dumpster, not in recycling.
- Only then, and only if allowed, use water. Use a damp mop or bucket on small marks and mop up the dirty water, keeping it away from drains. No hoses or pressure washers on paving unless all the water is collected for the sanitary sewer, with approval.
The same supplier's FAQ says its powder is biodegradable, will not harm waterways, and can be washed away with a bucket of water or a hose. Treat those as the manufacturer's claims. The state guidance below says the opposite about drains, and it is the standard to plan to.
What regulators say
Washington State's Department of Ecology publishes a stormwater practice written specifically for color events, BMP S436 in its 2024 stormwater manual (the practice first appeared in the 2019 edition). It is the most specific official guidance we found. Even outside Washington, it is a sound standard to show your facilities team. It says:
- Dye material and any wash water are prohibited discharges to storm drains. It adds that "biodegradable" and "non-toxic" labels do not mean a substance can go into storm drains or water bodies.
- Protect storm drains with berms, drain covers and catch basin covers, and take care when removing them so no dye goes in.
- Set up color stations at least 100 feet from any stream, pond or open stormwater feature, and don't let participants throw color within that distance.
- Don't use blowers to move dye material. Don't use hoses or pressure washers on tarps, sidewalks or paving unless all the water is collected and sent to the sanitary sewer, with approval from the local sewer agency.
- Start with handheld brooms on paved surfaces.
- Finish cleanup before the next forecast rain and no later than 24 hours after the event.
- Get the product's Safety Data Sheet from the manufacturer and review it for environmental hazards.
Cities can attach cleanup terms to a permit. In 2013, City of Lawrence, Kansas, staff recommended that a 5K color run post a $20,000 deposit before the permit was issued and pay the full cost of city services. The recommended conditions also had volunteers sweep powder away from curbs and gutters and stay at the color zones until Public Works dismissed them. A school event on its own grounds won't face terms like that, but a run on park paths or public streets might. Ask when you apply.
Local rules differ, so ask. The U.S. EPA notes that storm sewers are not designed to treat non-stormwater wastes, so what goes into them carries pollutants to nearby waters, and that cities with stormwater permits must prohibit non-stormwater discharges as far as local law allows. Some park departments set their own permit terms. Winnebago County, Wisconsin, for example, requires media barriers on storm drains and collection of colored rainwater. Your local stormwater office, facilities department and venue owner have the final say. Where their rules are stricter than this page, follow them.
Surface by surface
| Surface | Before the event | Cleanup | Watch for |
|---|---|---|---|
| Grass | The easiest surface. Put stations here when you can. | Rake or sweep heavy piles onto tarps and bag them. Light dusting can stay; ask facilities how they want it handled. | Thick piles smother grass. Keep stations off slopes that drain toward ditches or creeks. |
| Blacktop | Tarps under stations; cover nearby drains. | Broom into piles, dustpan into bags. Repeat until no color moves under the broom. | Paste forms if it rains before you finish. Clean the same day. |
| Concrete | Tarps under stations and at building entrances. | Dry sweep first. Remove marks with a damp mop or scrub brush and a bucket, then mop up the dirty water. | Concrete is porous and can hold color. No pressure washing unless all the water is collected for the sanitary sewer, with approval. |
| Rubber running track | Keep stations off it entirely. | Dry brush any powder carried onto it, and ask facilities before using water. | Queanbeyan East Public School's P&C warned that track material can be porous, leading to staining. |
| Artificial turf | Ask facilities or the turf installer before you plan any station on it. | Follow the installer's instructions. | Powder can settle into infill and fibers. Field-use rules often ban staining substances on turf; one school district's form, for example, bans marking or painting the turf field. If nobody can say how it cleans, use grass instead. |
| Painted walls, doors, windows | Keep stations well away, and set them downwind of buildings. Close doors and windows. | Brush dry powder off first, then wipe with a damp cloth. | Air vents near stations will pull powder indoors. Ask facilities to shut off intakes if possible. |
| Vehicles | Move cars away from stations, the finish and the dust-off area. Warn neighbors on streets near the course. | Owners should brush or rinse dry powder off promptly, before dew or rain wets it. | Damp powder on a hot car is the classic complaint (see the Atlanta lesson below). |
| Playground equipment, benches | Keep stations away; cover what you can't avoid. | Wipe with damp cloths after dry brushing. | Children will touch it the next morning, so check it in the walk-through. |
The station layout decides most of your cleanup work. Our course and color stations guide covers placing stations on the right surface and downwind of buildings and parking.
The cleanup crew plan
The course and station planner sets the cleanup crew at two people per station with a minimum of four. That is eight people for the four-station example. Recruit them as a separate shift so they aren't the same tired applicators. Name one cleanup lead, who also owns the walk-through with facilities.
Cleanup starts at each station as soon as its last wave has passed, not after the whole event ends. Short on helpers is the usual problem: Acme School Council in Alberta noted in its minutes that it could use a couple more volunteers for teardown.
Supplies for a four-station event
| Item | How many | Basis |
|---|---|---|
| Tarps or drop cloths | 8, plus 2 for building entrances | 2 per station |
| Push brooms and dustpans | 8 of each | 1 per crew member |
| Heavy-duty trash bags | 2 boxes | Powder is heavy; don't overfill |
| Drain covers or weighted plastic sheeting | 1 per drain within reach of the course | Walk the site to count |
| Work gloves, dust masks, eye protection | 1 set per crew member | Per volunteer |
| Buckets, mops, scrub brushes | 2 of each | For marks after dry sweeping |
Read the cleanup and handling sections of your supplier's SDS before choosing tools. Powder is a combustible dust, and some SDSs restrict how to collect it. One UK supplier's SDS, for example, says to clean up with a brush and pan and not to vacuum.
The example budget includes $80 for brooms, dustpans and trash bags, plus $200 for custodial or facilities overtime. The color run cost and budget guide shows where these lines fit in the full $2,700 example.
Disposal and leftover powder
- Used powder goes in sealed trash bags into the dumpster. Don't pour it into sinks, toilets, drains or compost.
- Unopened bags may be returnable. The supplier whose FAQ Coolum State School hosts takes returns only within 14 days of the event, unopened and undamaged. Ask your own supplier about its policy before you order.
- Opened bags can be kept for a rain date or another event within the supplier's shelf life, often about six months, if they stay dry. Roll them shut, tape them, put them in a lidded bin, and store them somewhere dry and away from heat. Our supplies and color powder guide covers shelf life and storage.
- Empty bottles, cups and packets go in the trash unless your recycler accepts them clean.
The facilities walk-through and sign-off
Before the crew leaves, the cleanup lead walks the whole site with the custodian or facilities contact. Use this sign-off so there's no argument the next morning:
If rain is forecast within a day, finish the dry cleanup the same afternoon. The Washington guidance sets 24 hours as the outside limit, and rain on uncollected powder makes the job harder.
For families: clothes, hair, skin and cars
Put these tips in the family notice so parents read them before the event, not after.
Clothes
- Shake out clothes outdoors while they're dry, then brush off what's left.
- Wash colored clothes separately in cold water, ideally on their own the first time.
- Check before using the dryer. Heat can set any color that's still there, so wash again if needed.
- Keep the white shirt as a keepsake if your child wants to.
Leather and suede shoes take color easily, so send old sneakers.
Hair
Brush hair out while it's dry, outdoors, before any shower. Then wash with shampoo, more than once if needed. For light-colored hair, apply something beforehand. Bowling Green State University's protocol suggests protecting light hair with leave-in conditioner or coconut or olive oil. Tight braids or a cap also help.
Skin
Brush off dry powder, then wash with soap and water. Wash again if a tint remains. Ears, necklines and the backs of knees collect the most. Anyone whose skin reacts should stop and follow the advice in our color powder safety guide.
Cars
Put a towel or old sheet over car seats before the ride home. Dust everyone off before they get in. If powder lands on your car's paint, brush or rinse it off soon, before it gets damp and sits in the sun.
A lesson from a big event
A large commercial color race at Atlanta's Piedmont Park in 2012 left residue on streets and cars. WSB-TV reported that one resident's new white SUV was stained from bumper to bumper with purple spots. The organizers agreed to pay to have the paint buffed and contracted 40 workers to clean up. A school event is far smaller, but the lesson scales down. Keep powder away from cars and property you don't control, tell neighbors ahead of time, and clean up the same day.
If cleanup is the part of a color run your facilities team won't accept, a plain walking event raises money the same way with none of it. Our main walk-a-thon guide covers that format.
- Cleanup checklistBefore the event, after the last wave, the walk-through, and family stepsDownload PDF
- Family noticeWhat to wear, what to bring, how to wash up, and the private powder-free request slipDownload PDF
Sources
- Coolum State School (hosting), Colour Powder Event Organiser FAQs (a powder supplier's FAQ hosted by Coolum State School). coolumss.eq.edu.au (accessed October 20, 2026)
- Washington State Department of Ecology (hosted by Kitsap County), BMP S436: BMPs for Color Events, 2024 Stormwater Management Manual for Western Washington (Pub. 24-10-013). kitsap.gov (accessed October 20, 2026)
- City of Lawrence, Kansas, Color Run memorandum (Aug 19, 2013, for Aug 27, 2013 City Commission agenda). assets.lawrenceks.gov (accessed October 20, 2026)
- Queanbeyan East Public School P&C, P&C Colour Run update (Mar 30, 2022). queanbeyae-p.schools.nsw.gov.au (accessed October 20, 2026)
- Acme School Council, School Council minutes, Jun 17, 2024. acmeschool.ca (accessed October 20, 2026)
- Bowling Green State University Risk Management, Color Run Safety and Protocol (08-11-16). bgsu.edu (accessed October 20, 2026)
- Kohler School District, Ebben Field application form (rev. 1/23/18). kohlerpublicschools-cdn.fxbrt.com (accessed October 20, 2026)
- U.S. Environmental Protection Agency, Stormwater Phase II Final Rule Fact Sheet 2.5: Illicit Discharge Detection and Elimination (Aug 2023). epa.gov (accessed October 20, 2026)
- Winnebago County Parks Department, Wisconsin, Run, Walk, Roll permit requirements. co.winnebago.wi.us (accessed October 20, 2026)
- WSB-TV, Color Run leaves some upset (Apr 1, 2012). wsbtv.com (accessed October 20, 2026)
- Supplier SDS hosted by Purbrook Infant School, Coloured powder Safety Data Sheet (No. EVC 002, Mar 3, 2022). purbrook-inf.hants.sch.uk (accessed October 20, 2026)
Frequently asked questions
Will rain wash the powder away if we leave it on the grass?
Some suppliers say rain will clean powder off grass and hard surfaces. That is a manufacturer's claim, and it isn't a cleanup plan. Rain turns piles into paste on paving and carries dye toward drains, which is why Washington's color-event guidance says to finish cleanup before the next forecast rain. A light dusting on a large lawn is a judgment call for your facilities staff. Heavy piles at stations should always be collected and bagged.
Can we use a leaf blower for cleanup?
No. Washington's color-event guidance says not to use blowers to move dye material. Blowers also spread powder into the air and toward drains, and a gas-powered blower is a spark source near combustible dust. Use push brooms and dustpans on paving and rakes on grass, and fold the station tarps inward to collect the heaviest piles. Brooms are slower, but they keep the powder where you can bag it, and they need no one's permission.
Who pays if powder damages someone's car or property?
Your group may, so prevention is cheaper. Move vehicles away from stations, warn neighbors, and photograph the area before and after. Ask your school, PTA insurer or venue now whether your liability coverage applies to property damage at the event, and get the answer in writing. If someone reports a mark, respond the same day and ask a professional detailer what removal would cost. Don't argue about blame on the spot.
Is color powder bad for the environment?
Suppliers often describe their powder as biodegradable. That word is the manufacturer's, and it doesn't settle the question. State stormwater guidance treats the dye and the wash water as pollutants that must stay out of storm drains, whatever the label says. In practice, the environmental risk depends on what you do. Collecting powder dry and bagging it keeps it out of the water, and hosing it into the gutter does the opposite.