Middlesex County EMS

Countywide Information

• BLS = Basic Life Support (Basic EMTs)
• INT = Intermediate Level Support
• ALS = Advanced Life Support (Paramedics)
• SMC: Saints Medical Center Paramedics (Formally GLEMS- Lowell)
• Note that town's fire frequencies are listed for Private Ambulance Companies providing 911 contracts unless noted.

EMS Provider Information

Community	EMS Providers	Frequency	Tone	Notes	Confirmation/Reconfirmations
Acton	ALS & BLS Fire Dept	453.1750	D074		See Fire Department for Confirmations
Arlington	BLS: Fire Dept	460.6000 R	82.5		See Fire Department for Confirmations
Arlington	ALS: Armstrong Ambulance	TG:155	T		2020.01.25 ecps92
Ashby	BLS: Fire Dept	460.5000 R	91.5		See Fire Department for Confirmations
Ashby	ALS: Townsend Fire	---	---
Ashland	BLS & ALS: Fire Dept	484.3875 R	123.0		See Fire Department for Confirmations
Ayer	BLS & ALS: Fire Dept	470.4250 R	D065		See Fire Department for Confirmations
Bedford	BLS & ALS: Fire Dept	453.7375 R	D125		See Fire Department for Confirmations
Bedford	Armstrong Ambulance	---	--	Primary Back Up	2020.06.18 GaryS
Belmont	ALS & BLS: Fire Dept	482.7750	77.0		See Fire Department for Confirmations
Belmont	Backup ALS: Armstrong Ambulance	---	---
Belmont	Backup ALS: Professional EMS	TG: 19824 on MSP	---		See MSP for confirmations
Billerica	ALS: Police Dept	483.0875 R	146.2	P15 P150 24 hours	2022.02.09. Matt0691
Boxborough	BLS: Fire Dept	46.5000	100.0		See Fire Department for Confirmations
Boxborough	ALS: Professional EMS	TG: 19824 on MSP	---		See MSP for confirmations
Burlington	ALS: Fire Dept	483.3625 R	131.8		See Fire Department for Confirmations
Cambridge	BLS: Professional Ambulance	800MHz Trunked	---		See Fire Department for Confirmations
Cambridge	ALS: Fire Dept	800MHz Trunked	--	Professional provides back up ALS	See Fire Department for Confirmations
Carlisle	BLS: Fire Dept	453.6375	N369		See Fire Department for Confirmations
Carlisle	ALS: Professional EMS	TG: 19824 on MSP	---		See MSP for confirmations
Chelmsford	BLS Trinity: LGH ALS is primary	---	---	Trinity A10 & A12 dedicated 911 BLS	2024.08.01 MASSBUSMARK
Concord	BLS: Fire Dept	483.5375 R	156.7		See Fire Department for Confirmations
Concord	ALS: Professional EMS	TG: 19824 on MSP	---		See MSP for confirmations
Dracut	BLS:Trinity EMS ALS:LGH Paramedics	154.4000 S	146.2	Trinity A6 & A8 Dedicated 911 BLS	2024.08.01 MASSBUSMARK
Dunstable	BLS: Trinity EMS ALS: LGH Paramedics	--- 453.3375	--- 94.8	Dispatched from Tyngsboro Base	2024.08.01 MASSBUSMARK
Everett	BLS Fire Department ALS: Cataldo Ambulance	470.0500	186.2		See Fire Department for Confirmations
Framingham	BLS & ALS: Brewster Ambulance	---	---	P4x ALS units assigned to Framingham	2020.07.18 disp617
Groton	BLS: Groton EMS ALS: Ayer Fire ALS: Townsend Fire-EMS	155.9025 R 470.4250 453.9000 R	127.3 D065 173.8
Holliston	BLS: Fire Dept	470.4750 R	D065		See Fire Department for Confirmations
Holliston	ALS: Events EMS	463.6250	88.5		2012.11.28
Hopkinton	BLS & ALS: Fire Dept	460.0875 R	D065		See Fire Department for Confirmations
Hudson	BLS & ALS: Patriot Ambulance	---	---	Paramedic 2
Lexington	BLS & ALS: Fire Dept	482.0875 R	D271		See Fire Department for Confirmations
Lincoln	BLS: Fire Dept ALS: Professional EMS	470.8500 R TG: 19824 on MSP	74.4 ---		2016.03.25 GaryS
Littleton	BLS & ALS: Fire Department	153.8150	151.4		2023.05.11 GaryS
Lowell	ALS & BLS: Trinity EMS ALS: LGH Paramedics	--- 154.2050 R	--- 186.2	LGH & Trinity split ALS responses	2024.08.01 MASSBUSMARK
Malden	BLS & ALS: Cataldo Ambulance	---	---
Marlborough	BLS & ALS: Patriot Ambulance	---	--	Paramedic 3: East Marlborough Paramedic 6: West Marlborough
Maynard	BLS: Fire Dept ALS: Professional EMS	470.9000 TG: 19824 on MSP	D065 ---		2016.03.25 GaryS
Medford	BLS & ALS: Armstrong Ambulance	---	---
Melrose	BLS & ALS Fire Department	---	---		See Fire Department for Confirmations
Natick	BLS & ALS: Fire Dept	154.2050 R	107.2		See Fire Department for Confirmations
Newton	BLS & ALS: Fallon Ambulance			Dispatched by Newton Fire	2021.06.04 GaryS
North Reading	ALS: Fire Department	453.9500 ---	D664 ---		2022.02.09 Matt0691
Pepperell	ALS: Fire Department	33.5200 --- 453.9000 R	141.3 --- 173.8		2022.02.09 Matt0691
Reading	BLS & ALS: Fire Dept	483.4125 R	146.2
Sherborn	BLS Fire Dept	483.0875	114.8		2020.06.18 GaryS
Sherborn	ALS: Brewster Ambulance	---	---
Shirley	BLS: Shirley EMS	471.5000 R	D114		2017.02.03 JBolduc
Shirley	ALS: Ayer Fire	470.4250 R	D065	Switched to SFD UHF 471.5000(D114) for dispatch
Somerville	BLS & ALS: Cataldo Ambulance	---	---
Stoneham	BLS & ALS: Cataldo Ambulance	---	---		2022.02.09 Matt0691
Stow	BLS & INT: Stow EMS ALS: Patriot Ambulance	46.5000 ---	100.0 ---
Sudbury	BLS & ALS: Fire Dept	482.7500	127.3		2016.03.25 GaryS
Tewksbury	BLS: Fire Dept	483.7125 R	100.0		2024.08.01 MASSBUSMARK
Tewksbury	ALS: LGH Paramedics	---	---		2024.08.01 MASSBUSMARK
Townsend	BLS & ALS: Townsend Fire-EMS	Tac 1: 453.9000 R	173.8		2014.06.07 N1BHH
Townsend	BLS & ALS: Townsend Fire-EMS	Tac 3: 453.7250 R	131.8
Tyngsborough	BLS: Fire Dept. ALS: LGH Paramedics	484.3750	167.9		See Fire Department for Confirmations
Wakefield	BLS & ALS: Cataldo Ambulance	483.4375	146.2	Effective November 28, 2019	2019.12.04 GaryS
Waltham	BLS & ALS: Armstrong Ambulance	TG:155	T		2021.06.04 GaryS
Watertown	BLS & ALS: Fire Department	483.7125	131.8	Back Up: Professional Ambulance	See Fire Department for Confirmations
Wayland	BLS & ALS Fire Departent	482.4125	203.5		See Fire Department for Confirmations
Westford	BLS & ALS Fire Dept	471.3250 R	N692		See Fire Department for Confirmations
Weston	BLS: Fire Dept	VHF / UHF-T			See Fire Department for Confirmations
Weston	ALS: Professional EMS	MSP		ALS:Professional EMS TG: 19824 on MSP	See MSP for confirmations
Wilmington	BLS: Fire Dept	154.2875 R	D025		See Fire Department for Confirmations
Wilmington	ALS: Action Ambulance	---	---		2022.10.10 MASSBUSMARK
Winchester	BLS & ALS: Fire Dept	483.6875	131.8		See Fire Department for Confirmations
Woburn	BLS: Fire Dept	483.6125 R	131.8		See Fire Department for Confirmations
Woburn	ALS: Action Ambulance	---	---

CMED Information

Middlesex EMS Agencies and Hospitals are handled by 3 different CMED's
As of 2012 Merrimack Valley CMED is completing Narrowband conversion and at the same time changing PL Tones to 123.0 Hz
As of December 31, 2012 Boston CMED has completed Narrow-banding conversion and at the same time changing PL Tones to 136.5 Hz.
It is not known as to the availability of Med 9 and Med 10 for Non Boston EMS users, as these two channels have different tones and different designations by Boston EMS

Agency	Frequency/System	Type	Tone	Use/Notes	Confirmation/ReConfirmations
CMED-Med 1	463.0000 468.0000	D	123.0	Framingham Hospital	2016.02.08 ecps92
CMED-MED 12	463.0125 468.0125	D	136.5	Newton-Wellesley Hospital	2021.06.13 ecps92
CMED-Med 2	463.0250 468.0250	D		Cambridge Hospital	2012.12.15 ecps92
CMED-MED 22	463.0375 468.0375	D	136.5	Lahey Hospital Winchester Hospital	2025.01.16 ecps92
CMED-Med 3	463.0500 468.0500	D	136.5	Emerson Hospital MetroWest Medical Winchester Hospital	2023.05.24 ecps92
CMED-MED 32	463.0625 468.0625	D
CMED-Med 4	463.0750 468.0750	D	136.5	Boston CMED -Call in Frequency	2024.02.01 ecps92
CMED-MED 42	463.0875 468.0875	D	123.0	Call in Frequency for North Shore	2013.09.07 ecps92
CMED-Med 5	463.1000 468.1000	D	136.5	Mount Auburn Hospital	2024.02.02 ecps92
CMED-MED 52	463.1125 468.1125	D	110.9	Marlboro Hospital	2019.04.12 ecps92
CMED-Med 6	463.1250 468.1250	D
CMED-MED 62	463.1375 468.1375	D	136.5	Emerson Hospital	2024.09.07 ecps92
CMED-Med 7	463.1500 468.1500	D	123.0	Melrose Hospital	2014.03.22 ecps92
CMED-Med 7	463.1500 468.1500	D	123.0	Whidden Hospital	2013.09.07 ecps92
CMED-MED 72	463.1625 468.1625	D
CMED-Med 8	463.1750 468.1750	D
CMED-MED 82	463.1875 468.1875	D
CMED-Med 9	462.9500	R	123.0	Lawrence General Paramedics Disp	2019.02.16 ecps92
CMED-MED 92	462.9625 467.9625	D
CMED-Med 10	462.9750	R
CMED-MED 102	462.9875	R	123.0	Statewide Med 102 MCI Channel Northeast CMED Interop with Municipal EMS Disp and Private EMS Disp	2012.11.28

Middlesex County Fire Departments Middlesex County Police Departments Middlesex County EMS Middlesex County Sheriff Department State Police in Middlesex County Middlesex County Municipal Departments and Utilities

Main Page Statewide Portal How to Add Info