Household hazardous waste drop-off in Maryland
In Maryland, programs may be called HHW, household chemical waste collection — the listings below use each agency's own name.
This page lists 5 permanent drop-off sites and 6 collection events or mobile collections in Maryland, compiled from 8 official sources. Listings cover 10 cities and towns, including Street, Annapolis and Baltimore. 6 of 11 were read directly from the agency's page, and 10 of 11 have a street-level map pin — the rest say so on their own page.
11 listings (5 permanent drop-offs, 6 collection events). Not every local program in Maryland is listed yet.
Call ahead. Hours, fees, residency rules, appointments and accepted materials change. Check the official page or call before you go. Never mix chemicals, and keep products in their original containers. Every listing links to its official source.
By city and county
All listings in Maryland
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Anne Arundel County Household Hazardous Waste Drop-Off — Heritage Office Complex
2662 Riva Road, Annapolis, MD
Dates: March 20, 2027 · Select Saturdays, 8:00 a.m.–2:00 p.m., at the Heritage Office Complex. The official 2027 dates are March 20, April 17, May 22, June 12, September 18 and October 9.
Hours: Saturday collection days 8:00 a.m.–2:00 p.m. The next posted date is March 20, 2027, with additional 2027 Saturdays on April 17, May 22, June 12, September 18 and October 9.
Source: Anne Arundel County Bureau of Waste Management Services · checked
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Baltimore City Sisson Street Household Hazardous Waste Drop-Off
2840 Sisson Street, Baltimore, MD
Dates: December 4, 2026 – December 5, 2026
Hours: Friday, December 4, and Saturday, December 5, 2026, 9:00 a.m.–5:00 p.m. at the Sisson Street Residential Recycling Center. The city page lists first Friday and Saturday drop-off dates each month through December.
Source: Baltimore City Department of Public Works · checked
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Baltimore County Central Acceptance Facility Household Hazardous Waste
201 West Warren Road, Cockeysville, MD
Hours: Monday–Saturday 7:00 a.m.–4:00 p.m. The entrance is on Drop Off Drive, off Warren Road, about one-quarter mile west of York Road.
Source: Baltimore County Bureau of Solid Waste Management · checked
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Shady Grove Transfer Station Household Hazardous Waste Drop-Off
16101 Frederick Road, Derwood, MD
Hours: During transfer station hours: Monday–Saturday 7:00 a.m.–5:00 p.m.; Sunday 9:00 a.m.–5:00 p.m. (Route 355 / Frederick Road entrance). The facility closes for bad weather, holidays and emergencies.
Source: Montgomery County (MD) Department of Environmental Protection · checked
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Baltimore County Western Acceptance Facility Household Hazardous Waste
3310 Transway Road, Halethorpe, MD
Hours: Monday–Saturday 7:00 a.m.–4:00 p.m. The facility is at the end of Transway Road, off the 4500 block of Hollins Ferry Road (I-695 exit 9).
Source: Baltimore County Bureau of Solid Waste Management · checked
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Charles County Household Hazardous Waste Collection
10430 Audie Lane, La Plata, MD
Dates: First Saturday of each month, 9:00 a.m.–3:00 p.m.
Hours: First Saturday of each month, 9:00 a.m.–3:00 p.m. at the Department of Public Works, 10430 Audie Lane.
Source: Charles County Department of Public Works · checked
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Prince George's County Too Toxic To Trash Collection — Largo Government Center
9200 Basil Court, Largo, MD
Dates: November 14, 2026
Hours: Saturday, November 14, 2026, 8:00 a.m.–1:00 p.m., rain or shine, at Largo Government Center.
Source: Prince George's County Department of the Environment · checked
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Howard County Alpha Ridge Landfill Household Hazardous Waste Collection
2350 Marriottsville Road, Marriottsville, MD
Dates: Saturdays from April through November, 8:00 a.m.–4:00 p.m. The 2026 season’s last collection is Saturday, November 28, 2026. The page says there are typically three special Saturday collections during the winter off-season.
Hours: Saturdays from April through November, 8:00 a.m.–4:00 p.m. at the Residents’ Convenience Center.
Source: Howard County Bureau of Environmental Services · checked
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Harford County Household Hazardous Waste Collection
3139 Scarboro Road, Street, MD
Dates: November 14, 2026
Hours: Saturday, November 14, 2026, 8:00 a.m.–noon at the Harford Mulch & Compost Facility. Free on-site document shredding is limited to four boxes per vehicle.
Source: Harford County · checked
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Harford Waste Disposal Center Used Oil and Automotive Drop-Off
3241 Scarboro Road, Street, MD
Hours: Monday–Saturday 7:00 a.m.–3:00 p.m.
Source: Harford County · checked
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Baltimore County Eastern Sanitary Landfill Household Hazardous Waste
6259 Days Cove Road, White Marsh, MD
Hours: Monday–Saturday 7:30 a.m.–3:30 p.m. There is no admittance after 3:15 p.m., and residents must finish unloading by 3:30 p.m.
Source: Baltimore County Bureau of Solid Waste Management · checked
Neighboring states
Many programs serve residents only, so a site across the state line may not take your waste — check its official page first.
Sources for Maryland: Anne Arundel County Bureau of Waste Management Services; Baltimore City Department of Public Works; Baltimore County Bureau of Solid Waste Management; Charles County Department of Public Works; Harford County; Howard County Bureau of Environmental Services; Montgomery County (MD) Department of Environmental Protection; Prince George's County Department of the Environment. How complete is this?