Humboldt Waste Management Authority — Household Hazardous Waste
Find household hazardous-waste receiving programs, eligibility and appointments.
Source checked October 15, 2026[1]www.hwma.net
Opens this office’s own website. CountyWiki does not process applications, take payments or provide personal records.
Contact details & office locations ↓Online services & information
These links were found on official source pages. Each service is handled by the office.
Hawthorne Street HHW receiving program, closed noon–1 pm. Check specific material exclusions and contact the hotline before transporting damaged containers.
Before you start
- Appointments · Business hazardous waste
- Business hazardous waste is by appointment Monday–Friday. [4]
- Availability · Household material limits
- Resident drop-off limit: 15 gallons or 125 lb; liquid volume is based on container size. [5]
- Availability · Medication exclusion
- HWMA facilities do not accept prescription or over-the-counter medications; use a medication-specific collection program. [6]
Fees
Fees are quoted only when a source document supports the amount and conditions.
Check the official website for its current fee schedule. No fee should be assumed to be free.
Forms & documents
Official forms and document pages for this office’s services.
Sources & last checked2 source pages · 8 citations
Sources were checked by an AI-assisted research process. A checked website does not mean every service or fee on it has been reviewed.
- [1] About Us - Humboldt Waste Management Authority (opens in a new tab)
County / official waste program · Waste service — reviewed program
Source reviewed October 15, 2026View supporting excerpt
Humboldt Waste Management Authority (HWMA) was established by a Joint Powers Agreement
- [2] About Us - Humboldt Waste Management Authority (opens in a new tab)
County / official waste program · Waste service — 06023
Source reviewed October 15, 2026View supporting excerpt
HWMA does not provide or oversee any curbside services, nor the rental of boxes or bins.
- [3] Hazardous Waste - Humboldt Waste Management Authority (opens in a new tab)
County / official waste program · Waste service — HHW receiving facility — materials, hours and hotline
Source reviewed October 15, 2026View supporting excerpt
Residential customers may drop off hazardous materials Monday thru Saturday from 8 am until noon and from 1 pm until 3 pm.
- [4] Hazardous Waste - Humboldt Waste Management Authority (opens in a new tab)
County / official waste program · Waste service — Business hazardous waste
Source reviewed October 15, 2026View supporting excerpt
Business by appointment only Monday - Friday
- [5] Hazardous Waste - Humboldt Waste Management Authority (opens in a new tab)
County / official waste program · Waste service — Household material limits
Source reviewed October 15, 2026View supporting excerpt
Residents may drop off up to 15 gallons, or 125 pounds of household hazardous waste.
- [6] Hazardous Waste - Humboldt Waste Management Authority (opens in a new tab)
County / official waste program · Waste service — Medication exclusion
Source reviewed October 15, 2026View supporting excerpt
Pharmaceuticals, whether prescription or over the counter will not be accepted at HWMA's facilities.
- [7] Hazardous Waste - Humboldt Waste Management Authority (opens in a new tab)
County / official waste program · Waste service — HWMA hazardous-waste hotline
Source reviewed October 15, 2026View supporting excerpt
Hazardous Waste Hotline: (707) 441-2005
- [8] Hazardous Waste - Humboldt Waste Management Authority (opens in a new tab)
County / official waste program · Waste service — Hawthorne Street HHW facility
Source reviewed October 15, 2026View supporting excerpt
Hours of Operation: Monday - Saturday 8:00 AM to 3:00 PM (Closed from 12:00 PM to 1:00 PM)