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Longmont, CO Trash & Recycling: Illegal Dumping (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified August 2026

Key Facts

Prohibited materials
litter, offal, dead animals, excrement, garbage
Covers
public & private grounds and streets
Also liable
anyone who 'causes or permits' dumping
Correction period
at least 14 days
Abatement surcharge
cost + 20% admin fee
Default fine
up to $500, 90 days

Summary

Longmont bans dumping bottles, cans, litter, dead animals, excrement, garbage, or any other offensive matter on any private or public ground or street. Longmont Municipal Code § 9.04.080 declares the act a public nuisance, enforced through the city's nuisance-abatement notice process and the Code's default fine of up to $500.00.

No person shall throw or deposit, or cause or permit to be thrown or deposited, any bottles, cans or other litter, any offal composed of animal or vegetable substance, or both, or any dead animal, excrement, garbage or other offensive matter whatever, upon any private or public grounds or streets.

Full Breakdown

Section 9.04.080 sits inside chapter 9.04's nuisance code and reads in full: "No person shall throw or deposit, or cause or permit to be thrown or deposited, any bottles, cans or other litter, any offal composed of animal or vegetable substance, or both, or any dead animal, excrement, garbage or other offensive matter whatever, upon any private or public grounds or streets." The ban covers public property, streets, alleys, and parks, and private property belonging to someone else; it also reaches a property owner or occupant who merely "causes or permits" another person to dump, not just the person physically doing the dumping.

Because chapter 9.04 is titled "Nuisances" and defines a nuisance as "any state of things this Code specifies as a nuisance or public nuisance" (§ 9.04.010), illegal dumping under § 9.04.080 is enforced through the same abatement machinery as Longmont's other nuisance sections. An authorized officer gives written notice with "a correction order allowing at least 14 days to make the repairs and improvements required to abate the nuisance" and notice of the right to appeal to chapter 16.30 (§ 9.04.150.B). If the dumped material is not removed in time, the city may clean it up itself and certify "the cost, plus a 20 percent administrative service charge" as a lien on the property, collected through the county treasurer like a property tax (§ 9.04.150.F). The city attorney may also go directly to court for an injunction against a person who keeps dumping, and the property owner remains liable to the city, "jointly and severally with every person creating or maintaining the nuisance," for the city's abatement expense (§ 9.04.150.I).

Violations & Fines

Chapter 9.04 sets no separate fine specifically for § 9.04.080, so a dumping conviction falls to the Code's default penalty in § 1.12.010: up to a $500.00 fine and up to 90 days in jail, or both. Failing to abate a dumping nuisance after notice is a further offense under § 9.04.150.D, and the owner also owes the city's cleanup cost plus the 20 percent administrative surcharge on top of any court fine.

Frequently Asked Questions

Is dumping trash on someone else's private property illegal in Longmont, or just public land?
Both. Section 9.04.080 bars dumping litter, garbage, or offensive matter "upon any private or public grounds or streets," so dumping on a neighbor's vacant lot is just as much a violation as dumping in a city park or alley.
Can a property owner be cited for dumping someone else did?
Yes, in a sense. Section 9.04.080 makes it unlawful to "cause or permit" material to be dumped, and separately, § 9.04.150.I holds the property owner liable to the city "jointly and severally" with whoever created the dumping nuisance for the cost of cleaning it up.
What happens after the city finds illegal dumping on my property?
You get written notice with a correction order giving at least 14 days to clean it up and information on your right to appeal under chapter 16.30. If it isn't cleaned up in time, the city can remove it and bill you the cost plus a 20 percent administrative fee.
What's the criminal penalty for illegal dumping in Longmont?
Chapter 9.04 sets no dumping-specific fine, so it defaults to the Code's general penalty in § 1.12.010: up to a $500.00 fine and up to 90 days in jail, on top of any abatement costs the city recovers separately.

Sources & Official References

Other rules in Longmont

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