County guide

Zone 0 in Colusa County: fire law written for rice country, read through the archive

Fact-checked August 23, 2026·Sources at the end of this article

Two sets of rules, and neither one binds your fence today

As of August 23, 2026 we could find no Zone 0 or ember-resistant-zone requirement in Colusa County's code. As with several counties on our survey, the method is part of the record: the county's publisher blocks direct access, but the Internet Archive holds its one-page-per-chapter site, and we read the operative chapters from those captures, the fire chapter as served in March 2024, the building chapter from October 2023, the weed chapter from a 2008 capture we flag as dated. Every claim here carries those dates.

What the fire chapter contains is agriculture's version of fire law. Fireworks stands get siting and clearance rules. Smoking in vegetated areas is banned from May 1 to November 1. And the operative vegetation provision, the county's signature rule, is a firebreak requirement written for crops: every person in possession of land carrying inflammable grain, hay or vegetation must maintain a firebreak at least three feet wide around its outer boundary where it adjoins other farmland or a highway. Three feet, around the field, to keep a harvest fire from spreading, a rule about protecting crops from each other rather than homes from embers. The weed abatement chapter is a standard seasonal nuisance regime in which "fence" appears only inside the definition of the improvements weeds must be cleared away from. The building chapter adopts the 2016 California Fire Code without local fire amendments. Nothing anywhere addresses the first five feet around a home or what a fence is made of.

Adopted, not yet in effect: the statewide regulation, which will be the first five-foot materials standard in this county once effective. It cleared the Board of Forestry on August 19, 2026 and still needs Office of Administrative Law review and publication by the Secretary of State, so no compliance clock is running. Our timeline and enforcement guide covers the phase-in, and the register lists the eighteen jurisdictions we can prove have Zone 0 rules in force. None is in Colusa County.

Where the statewide rule will reach in this county

Most of Colusa is rice and row-crop flat where wildfire is a field-edge event. The exception is the west side, where the county climbs into the coast range: Stonyford and Lodoga under the Mendocino National Forest, the East Park Reservoir country, and the grades toward the Snow Mountain wilderness, the corner the 2020 August Complex reached. That side is State Responsibility Area, where the rule covers every hazard class under Public Resources Code section 4291 on the five-year existing-home clock once effective. The cities of Colusa and Williams sit on the valley floor on the Local Responsibility Area track where their maps say so. Start with our address lookup walkthrough.

Claims we could not verify

• Whether the code has changed since the archived captures. The fire chapter read is the page as served in March 2024; a newer ordinance would be invisible to us.
• The cities of Colusa and Williams. Not individually read; note that the city of Colusa keeps its own separate code.
• The fire districts' ordinances. Not read.

What this means for you

• Do not buy a fence because you think Colusa County requires one. Nothing we could read regulates fence materials. The statewide rule, once effective, asks for a five-foot noncombustible span where a fence attaches to the house; our fence requirements guide quotes the adopted text.
• On the west side, the state's hundred-foot duties are today's law. Stonyford and Lodoga sit in real fire country whatever the county code says. The free first-five-feet work is where to start.
• Check your track while nothing is due. Check your address against CAL FIRE's own layers, then walk the first five feet with our self-assessment, which also flags what you do not need to buy.

How often CAL FIRE inspects here

CAL FIRE's public dashboard shows no Colusa County inspections at all for July 2026, the month it currently reports. That is not a clean bill, and we are not going to guess the cause from a dashboard cell: the hundred-foot duties still apply on every State Responsibility Area parcel here, and a month with no posted inspections says nothing about whether yours would pass one.

Two things this does not tell you. These counts cover inspections by CAL FIRE and Contract Counties inside the State Responsibility Area only, so work done by local fire agencies in the Local Responsibility Area is absent entirely. And none of these inspections is checking Zone 0: they are inspections against the defensible space rules in force today, which reach from the structure out to one hundred feet and contain no ember-resistant zone requirement. See the full inspection figures and what they mean, read from CAL FIRE's public dashboard on August 23, 2026.

Not the county you were looking for? See every jurisdiction we can prove has a rule in force, and ask us to add yours.