Town of Halifax MA
499 Plymouth Street, Halifax, MA 02338
Monponsett Pond and Mosquitoes
Current Monponsett Pond Information

The Town of Halifax through its agent, SOLitude Lake Management, will begin treatment of West Monponsett Pond on Monday, May 14, 2018 and end the treatment on Friday, May 18th. SOLitude will be treating West Monponsett Pond with a solution of aluminum sulfate. Aluminum sulfate binds with phosphorous, one of the key nutrients that helps algae to thrive. By making the phosphorous unavailable as a nutrient, algae growth is reduced. This is being done to improve the water quality of West Monponsett Pond and with the hope that the Pond will be open for more days this spring and summer for recreational use including boating, swimming, and fishing. The Town asks that the Pond not be used, including no boating, swimming, or fishing, on days that West Monponsett Pond is being treated. These include the periods of May 14th to May 18th. Recreational use of West Monponsett Pond while the Pond is being treated will reduce the efficiency of the treatment and may interfere with the work being done by SOLitude. Regular recreational use of the Pond will resume on Saturday, May 19th. The State Boat Ramp will be closed on the days that treatment occurs. Anyone needing additional information should contact the Halifax Board of Selectmen's Office at 781-294-1316.

Data for 2015, 2016, and 2017 can be reviewed.

The following table shows algae counts for the spring, summer and fall of 2018. A count of under 70,000 cells/ml (milliliter) is good. If there is a week in which the count goes above 70,000, it requires two consecutive counts of under 70,000 to lift the advisory on not swimming, boating, etc. At this time, West Monponsett and East Monponsett are tested once a week.


Date
Location
Cells/ml
Pond status
June 14, 2018
State Boat Ramp/Route 58 - West Monponsett
4,170
Clean result. Monponsett Pond is open.
June 14, 2018
Route 36 Boat Ramp - East Monponsett Pond
no test done
June 14, 2018
4th Avenue beach - West Monponsett
no test done
June 22, 2018
State Boat Ramp/Route 58 - West Monponsett
1,549
Clean result. Monponsett Pond is open
June 28, 2018
4th Avenue beach - West Monponsett
2,446
Clean result. Monponsett Pond is open
June 28, 2018
State Boat Ramp/Route 58 - West Monponsett
5,011
Clean result. Monponsett Pond is open
June 28, 2018
Route 36 Boat Ramp - East Monponsett Pond
0
Clean result. Monponsett Pond is open
July 3, 2018
4th Avenue beach - West Monponsett
1,196
Clean result. Monponsett Pond is open
July 3, 2018
State Boat Ramp/Route 58 - West Monponsett
1,525
Clean result. Monponsett Pond is open
July 3, 2018
Route 36 Boat Ramp - East Monponsett Pond
1,590
Clean result. Monponsett Pond is open
July 12, 2018
State Boat Ramp/Route 58 - West Monponsett
5,615
Clean result. Monponsett Pond is open
July 18, 2018
4th Avenue beach - West Monponsett
19,956
Clean result. Monponsett Pond is open
July 18, 2018
State Boat Ramp/Route 58 - West Monponsett
10,899
Clean result. Monponsett Pond is open
July 18, 2018
Route 36 Boat Ramp - East Monponsett Pond
18,567
Clean result. Monponsett Pond is open
July 24, 2018
State Boat Ramp/Route 58 - West Monponsett
24,474
Clean result. Monponsett Pond is open
July 24, 2018
4th Avenue beach - West Monponsett
Not tested
July 24, 2018
Route 36 Boat Ramp - East Monponsett Pond
24,474
Clean result. Monponsett Pond is open
July 31, 2018
State Boat Ramp/Route 58 - West Monponsett
9,101
Clean result. Monponsett Pond is open
July 31, 2018
4th Avenue beach - West Monponsett
9,890
Clean result. Monponsett Pond is open
July 31, 2018
Route 36 Boat Ramp - East Monponsett Pond
30,029
Clean result. Monponsett Pond is open
August 7, 2018
State Boat Ramp/Route 58 - West Monponsett
12,930
Clean result. Monponsett Pond is open
August 7, 2018
4th Avenue beach - West Monponsett
Not tested
August 7, 2018
Route 36 Boat Ramp - East Monponsett Pond
25,088
Clean result. Monponsett Pond is open
August 14, 2018
State Boat Ramp/Route 58 - West Monponsett
3,748
Clean result. Monponsett Pond is open
August 14, 2018
4th Avenue beach - West Monponsett
Not tested
August 14, 2018
Route 36 Boat Ramp - East Monponsett Pond
5,953
Clean result. Monponsett Pond is open
August 21, 2018
State Boat Ramp/Route 58 - West Monponsett
12,961
Clean result. West Monponsett Pond is open.
August 21, 2018
Route 36 Boat Ramp - East Monponsett Pond
97,248
Count is over 70,000. East Monponsett Pond is closed.
August 27, 2018
Route 36 Boat Ramp - East Monponsett Pond
63,234
While count is under 70,000, count must be under 70,000 two weeks in a row for Pond to be re-opened. East Monponsett Pond is closed.
August 27, 2018
State Boat Ramp/Route 58 - West Monponsett
21,738
Clean result. West Monponsett Pond is open.
September 4, 2018
State Boat Ramp/Route 58 - West Monponsett
25,017
Clean result. West Monponsett Pond is open.
September 4, 2018
Route 36 Boat Ramp - East Monponsett Pond
92,808
Count is over 70,000. East Monponsett Pond is closed.
September 10, 2018
State Boat Ramp/Route 58 - West Monponsett
26,873
Clean result. West Monponsett Pond is open
September 10, 2018
Route 36 Boat Ramp - East Monponsett Pond
29,163
While count is under 70,000, count must be under 70,000 two weeks in a row for Pond to be re-opened. East Monponsett Pond is closed.
September 17, 2018
State Boat Ramp/Route 58 - West Monponsett
73,552
Count is over 70,000. East Monponsett Pond is closed.
September 17, 2018
Route 36 Boat Ramp - East Monponsett Pond
23,763
Clean result. West Monponsett Pond is open


Current Mosquito Information


Latest Mosquito Information (September 20, 2018)

The Massachusetts Department of Public Health has announced the first Eastern Equine Encephalitis (EEE) positive mosquito sample in the species Culiseta melanura ( a bird-biting swamp mosquito) from Lakeville collected on September 17, 2018. DPH continutes to rate the risk in Halifax as "low".

Due to the significant number of positive results for mosquitoes carrying the West Nile Virus (WNV), the Commonwealth has labeled Halifax’s risk status as "Moderate". Samples have been confirmed throughout much of Massachusetts, including five samples in Halifax on September 4, 2018. The results have been found in a variety of Cluex mosquitoes. Natural and artificial containers are the preferred larval habitat of Culex mosquitoes. It feeds almost primarily on birds but has been known to bite humans on occasion. This species is typically collected from May to October but can be found year round as it readily overwinters in man-made structures. Cx restuans has been implicated as a vector of WNV. Take this bird biter as a warning. People have control over stagnant water in containers: buckets, tarps, tires, etc. Rinse them out, turn them over. Rinse bird baths at least twice a week.

Residents should continue to take precautions including removing all containers with standing water such as accumulating junk in the yard, not maintaining swimming pools and allowing them to sit with green stagnant water, along with toys, tarps and tires. The peak time for transmission of EEE will continue through at least some of September. The types of mosquitoes most likely to carry EEE are considered to be active dusk to dawn but the timing of that activity can be impacted by temperature, humidity, cloud cover and day length. In addition, active participation in outdoor sports increases our availability to mosquitoes. Physical exertion and sweating may also change individual attractiveness to mosquitoes and may decrease the time that repellents are effective.

DPH is writing to ask you to help us get the word out to residents, schools and athletic groups, that it is important to take steps to avoid mosquito bites. Know the drill – mosquito repellents, clothing and limiting outdoor activity during peak mosquito activity hours. In case they are useful, the DPH wants to remind you of the short PSA videos that it has available online for you to download and use (or link to). They are available at www.mass.gov/mosquitoesandticks.

Also, keep in mind that our residents travel between cities and towns regularly and some of those may travel from areas not familiar with EEE.  They may not be mindful of the importance of preventing mosquito bites.  Please remind them.

To call for ground spraying of your property, call Plymouth County Mosquito Control at 781 585 5450

Individuals can call the Project, between 8:00am and 3:00pm on Monday through Friday, to request that their property be sprayed. The Project’s phone number is (781) 585-5450, fax (781) 582-1276 or mail us at P.O. Box 72, Kingston, MA 02364. To find out where the spray routes are going to be call (617) 582-6219 (during spray season). Plymouth County Mosquito Control Project

For more information on EEE and WNv, please see DPH's site at:



Monponsett Pond - Frequently Asked Questions

What is the enabling legislation that allows the City of Brockton to divert water from Monponsett Pond?

There was legislation approved in 1893, 1896 and 1899 concerning Silver Lake and in 1885 concerning water resources in Rockland, Abington and "South Abington".

The Massachusetts State Legislature approved the enabling legislation in 1964. This was modified in 1981. The MA Department of Environmental Protection modified this slightly to allow for diversion to Silver Lake during the summer months under certain conditions.

The MA Department of Public Works approved a license for the diversion infrastructure in 1965.

Who do I contact to hold a fishing tournament, a boat contest or a similar event on Monponsett Pond?

Contact the Commonwealth of Massachusetts. Permit forms can be downloaded or you can contact David Diotalevi, Access Program Coordinator, 53 Groton Shirley Road, Ayer, MA 01432. Tel. 978-772-4658; Fax. 978-772-9824; Email david.diotalevi@state.ma.us 

How can I obtain a copy of the presentation made by Lycott Environmental in early 2013 concerning algae remediation?

A copy of the presentation is available on the Town's web site.

What studies are available about the natural and manmade water flows in the area?

The Division of Marine Fisheries published a report on the Forge Pond Dam, which is between Silver Lake and the Jones River in 2013. While not specific to Monponsett Pond, because Brockton is allowed to divert water from Monponsett Pond to Silver Lake, Monponsett Pond is mentioned a number of times. The Sustainable Water Management Initiative report concerning Silver Lake, Monponsett Pond and Stump Brook was completed in the summer of 2013.

What records are available for water flows to and from Monponsett Pond?

Diversion data for Monponsett Pond and other bodies of water (1996-2013) - Excel workbook
"[Link]Legend" for columns in the Excel workbook
Flows through the fish ladder at the Brockton Dam on Stump Brook (2013) - Text file

What examples exist of work being done on similar ponds in Massachusetts?

The White Island Pond (a pond in Wareham and Plymouth) Conservation Alliance has issued its brochure for 2013. It contains advice how how residents and others can lower the amounts of phosphorous going into White Island Pond along with a progress report of the work begin done. In addition, the Massachusetts Bureau of Resource Protection (part of DEP) issued a report (2010) on the Final Total Maximum Daily Load of Total Phosphorous for the pond, establishing a benchmark.

How much water can be diverted on a daily basis from Monponsett Pond to Silver Lake? How much water could be diverted downstream via Stump Brook?

According to Princeton-Hydro, the Silver Lake Diversion Pipe can divert a maximum of 40 cubic feet per second (cfs) or 25.8 million gallons per day (MGD).

The maximum amount of water that can be sent downstream using the fish ladder at the Brockton Dam on Stump Brook is 15 cfs or 9.7 MGD.

If the water level at the Brockton Dam is six inches above the height of the dam, then 80 cfs or 51.7 MGD will go over the dam.

If the water level at the Brockton Dam is one foot above the height of the dam, then 200 cfs or 129.3 MGD will go over the dam.