General statement from the State Reclamation & Mosquito Control Board


Central Mass. Mosquito Control Project

Weekly Report- 8/6/17-8/12/17

EPI Week #32



Cumulative Surveillance Summary

Target Species

Ae. vex

Cq. per

Cs. mel

Oc. can


All Species

No. Pools







Total Specimens







No. Pools WNV +







No. Pools EEE +







†Pool of WNV+ Culex species collected in Milford on 7/27/17

†Pool of WNV+ Culex species collected in Ashland on 7/27/17

†Pool of WNV+ Culex species collected in Chelmsford on 8/1/17

†Pool of WNV+ Culex species collected in Millbury on 8/4/17


Weather Summary (Northborough, MA):       The weather for this particular week averaged 68.91°F with a recorded high temperature of 88.20°F and a recorded low temperature of only 54.50°F.  For this week there was also a total of 0.12 inches of rain observed.  Compared to the previous week, it was approximately 2.78°F cooler on average, and rained about 0.51 inches less.  There has been 0.75 inches of rain accumulated in August, after 2.04 inches for the month of July.


CMMCP Mosquito Summary*-

Target Species                Δ From        Δ From        Predominant Trap Site(s)

                                        Last Week    Last Year

Aedes vexans



Lunenburg, Lowell, Westford

Coquillettidia perturbans



Tewksbury, Westford, Billerica

Culiseta melanura



Hopkinton, Lowell, Ayer

Ochlerotatus canadensis



Acton, Westford, Lowell

Culex Species



Westford, Webster

All Species



Westborough, Westford, Tewksbury

The predominant mosquito for the week was Cq. perturbans followed by Culex spp.


Epi week #32 narrative:


The temperatures for EPI week 32 averaged approximately 2.78 degrees cooler than the previous week, with 0.12 inches of precipitation observed.  Overall collection numbers decreased by 13.91% from EPI week 31.  The only target mosquitoes not to increase from the prior collection period were Coquillettidia perturbans and Culex.  To this point in the season, all target species have been collected in lower numbers compared to 2016 aside from Ae. vexans and Culex.  This week Cq. perturbans was the most abundant mosquito in the CMMCP service area followed by Culex.  Cq. perturbans may continue to decrease as the season progresses.  Two additional mosquito pools collected in EPI week 31 were determined to be WNV positive.  One collection was from a trap site in Chelmsford, with the other originating from Millbury.  Additionally, Aedes albopictus was detected in Ayer through mosquito eggs collected in CMMCP ovitraps. 


We have received 183% more service requests than the 14 year average (15,065 in 2017 v. 8,236 14 yr. avg.), and 5% more than this time in 2016 (15,065 in 2017 v. 14,340 in 2016). Service requests decreased 2.17% from Epi week 31. 537 service requests were received and 630 requests were performed in Epi week 32 with favorable weather conditions. Vector spraying was done in Chelmsford on August 9 after confirmation of WNV in Culex and coordination with local health officials.


Submitted by Frank Cornine, CMMCP Staff Biologist

Massachusetts Monthly Rainfall Graph – 2017 vs. 37 year average

CMMCP Weekly Rainfall Graph – 2017 vs. 12 year average (CMMCP/Northborough weather station)

2017 District Graphs

2017 Mosquito Collections – Submitted to MDPH

Service request history – 2017 vs. 14 year average

2017 rainfall vs. request graph

CMMCP trap locations - 2017 (.pdf)


What is an “Epi Week”?

Click here for the html version of the 2017 Epi Week calendar courtesy of CMMCP; includes .pdf links to our weekly surveillance reports as they become available.

Click here for the pdf version of the 2017 Epi Week calendar courtesy of Jennifer Forman-Orth of MDAR.


2017 surveillance data

2016 surveillance data

2015 surveillance data

2014 surveillance data

2013 surveillance data

2012 surveillance data

2011 surveillance data

2010 surveillance data

2009 surveillance data

2008 Surveillance data

2007 Surveillance data

2006 Surveillance data

CMMCP District information – the 41 cities and towns in the CMMCP service area are broken down into 5 Districts. Each District has a Crew Leader and Field Technician assigned full time. A general description of these Districts would be: District 1 (yellow), Northeast; District 2 (blue), Northwest; District 3 (green), Central; District 4 (red), Southeast and District 5 (magenta), Southwest. Town in gray belong to other mosquito districts.