Westchester County Environmental Labs are state and nationally accredited for over 700 analytes.

General contact information:
Tel:   (914) 231-1620
Fax:  (914) 231-4458
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Hours of Operation:
Monday - Friday
8 a.m. - 4 p.m.
Unless otherwise specified:
multiple samples must arrive by 3:30 pm
single samples must arrive by 3:45 pm

Saturday & Sunday
(by appointment)

Please call client services for sample collection and submission inquiries.

One of the Department of Laboratories and Research's distinctions is to fulfill the medicolegal, criminalistic, public health, and environmental needs and requirements of Westchester County. This is accomplished through laboratory analyses and death investigation; and by conducting professional research in these areas.

Among the governmental organizations within the counties and New York State, Westchester's Department of Laboratories and Research remains unusual. The department represents a fusion between the Medical Examiner Office, and the associated laboratory functions of Toxicological and Forensic Science Services, with the County's Public Health Laboratories.

This arrangement groups nearly all county laboratories under one single administrative control, concentrating laboratory expertise and sophisticated instrumentation for the good of all sections. This permits an interchange of scientific knowledge, technology, and data. This arrangement works favorably toward the department's goal, which is fulfillment of the medicolegal and public health needs; and requirements of Westchester County through service and developmental research.

Our physical and mailing address is 10 Dana Road, Valhalla, NY, 10595.  The general telephone number is (914) 231-1610 and our fax number is (914) 231-1772. To get to our offices follow the appropriate of directions below: 

From the Sprain Brook Parkway

• If you are traveling north or south, take the Eastview, Rte. 100C Exit.
• If traveling north, take a left at the top of the exit ramp (a light), pass over the Sprain, to the third traffic light and make a right onto Walker Road (formerly Bee-line Boulevard).
• If traveling south, make a right at the end of the exit ramp (a light) to the second traffic light and make a right onto Walker Road.
• Travel to the end of Walker Road where it terminates at Dana Road. Make a right onto Dana Road.
• Westchester County Department of Laboratories & Research is the building immediately on the right after the stop sign at the top of the hill. 

From the Saw Mill Parkway

• If you are traveling north or south, take the Eastview Exit (Exit 23).
• If traveling north, take a right at the bottom of the exit ramp (a light).
• If traveling south, take a left at bottom of exit ramp (a light).
• Pass under the archway of the building that spans across the road.
• Stay in the left lane and pass over Rt. 9A. Immediately after, take a left onto Rt. 9A North.
• Travel north on 9A approximately 100 yards to the first traffic light and make a right onto Dana Road.
• Westchester County Department of Laboratories & Research is the building immediately on the right after the stop sign at the top of the hill. 

From the Tappan Zee Bridge

After passing through the tolls, stay to the right and follow signs to Exit 8A Saw Mill Pkwy North.

• See directions above for "Saw Mill Parkway, North". 

From I87 - New York State Thruway (Major Deegan)

• Take I87 North to Exit 8, Saw Mill Parkway North.
• See directions above for "Saw Mill Parkway, North". 

From New York City

• Take the Sprain Brook Parkway Northbound. See directions above "From the Sprain Brook Parkway." 

From I95 (New England Thruway)

• Take I287 Westbound (Cross Westchester Expressway) and get off at Exit 3.
• Follow signs for Sprain Brook Parkway Northbound (bear left).
• See directions above "From the Sprain Brook Parkway."

From the Taconic State Parkway

• The Taconic Southbound becomes the Sprain Brook Parkway right after the Bronx River Parkway Exit.
• See directions above "From the Sprain Brook Parkway." 

If you're interested in employment with the Microbiological or Environmental Laboratory Services sections of the Department of Laboratories & Research, visit the Westchester County Department of Human Resources job postings. 

New job openings are posted each week and are accessible for a specific period of time (usually 10 business days) during which time you may submit your application. 

Read more about civil service exams and exam announcements.