HAB information 2017 season

Both Park Beach and Children’s Beach Will Be Open 6/24 and 6/25/17

Children’s Beach was reinspected by DOH on 6/19/20 and the sample was clear. Both Children’s Beach and Park Beach will be open for swimming this weekend.

Children’s Beach was closed 6/10, 6/11, 6/17, and 6/18  because of extensive weeds and possible risk of HAB. Once the algal blooms cleared, the DOH returned to sample the water for Microcystin LR, a toxin made by the blue-green algae. DOH opens the beaches when Microcystin LR concentrations are less than 4 micrograms per liter (mcg/L).

HAB at children's beach 6-11-17

HAB at Children’s Beach 6-11-17. Note: “spilled paint” appearance and bright blue color

This closure applied specifically to Children’s Beach. However, please note that the same common sense applies to all areas of the lake where blooms are observed. Do not swim through algal bloom. Do not allow small children to play in shallow water that is not clear. Keep pets out of these areas. Do not drink lake water.

What are Harmful Algal Blooms (HAB)?

Harmful Algal Blooms occur when blue-green algae, also called cyanobacteria, grow quickly in water, often (but not always) in response to increases in nutrients and hot, dry, still weather conditions. Cyanobacteria intermittently, but not always, produce toxins, potentially harmful to the health of the environment, plants, animals, and people. There are many different toxins produced by cyanobacteria. The most commonly tested toxin, or “index toxin” in our area is Microcystin LR. Its presence in concentrations higher than 4 mcg/L, is considered potentially harmful and is also indicative of the possible production of other toxins by the cyanobacteria.

How do the toxins in HAB cause illness?

Rarely, there may be skin rashes or itching. Mostly, however, the toxins must be ingested to be a problem. Therefore, for the most part, it is safe to swim in areas of the lake that are clear.   But, be reasonable; do not swim through algal bloom. Remember: Do not allow small children to play in shallow water that is not clear. Keep pets out of these areas.  Do not drink lake water. When in Doubt, Stay Out.

What can I do to decrease or prevent algal blooms?

Don’t add nutrients to the lake:

  • Use only phosphorus free fertilizers (middle number is zero) and use them sparingly
  • Plant a buffer zone of deep rooted grasses, shrubs, or natural vegetation at the shoreline. Do not cut down trees in the watershed of the lake.
  • Have your septic system inspected and pumped at least every 3 years.  Make repairs promptly and, if necessary, replace outdated or  ineffective systems
  • Use phosphate-free laundry and dishwashing soap
  • Compost or properly dispose of leaves, lawn clippings, garden waste, goose poop, etc. Not in the lake, please!

Useful Links

NY State DOH

NY State DEC

Photo Gallery: What do Harmful Algal Blooms Look Like

EPA drinking water advisory

Toxic drinking water in Ohio, Washington Post 2014

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Septic Smarts

RBLPOA has negotiated discounts for Roaring Brook Lake District residents with three septic companies: Cook, EarthCare, and Mahopac Septic.

These discounts may be helpful to you, but do not indicate the endorsement of RBLPOA. As always, be a smart consumer. Compare, talk to your neighbors, read the small print.


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Please welcome Fred S. Lubnow, PhD, our new lake manager

It is a pleasure to introduce Fred Lubnow, Director of Aquatic Programs at Princeton Hydro, who will be taking over as our lake manager at Roaring Brook Lake. Fred has extensive experience in lake and watershed management, restoration ecology, community and ecosystem ecology, cyanobacteria biology, and the use of benthic macroinvertebrate and fish in-stream bioassessment protocols.

Fred received his Bachelors of Science in Biology from Susquehanna University, PA (1988), and both his Masters degree in Environmental Sciences (1992) and his Ph.D. in Limnology (1994) from the University of California Davis.  Dr. Lubnow was the Region III Director of the North American Lake Management Society and the Treasurer for the Pennsylvania Lake Management Society. He is a committed speaker and educator and has given many talks through the years at  the New York State Federation of Lake Associations and the Cary Institute, among others.

Fred has a good feel for Putnam County lakes. He has developed Lake Management Plans for Lake Peekskill, and Lake Tonetta (Southeast) and he worked with the RBL  community on our plan to use sterile carp for weed control.

The work of sampling, measuring, testing and evaluating the data as well as forming recommendations for management will take place over about 3 years. Fred will be available to us for immediate questions or emergencies and also to discuss issues with the community at a public meeting once or twice a year.

Fred will visit our lake over the summer and will be our guest at an RBL District meeting in the fall for a talk and Q&A. Please join me in welcoming him to Roaring Brook Lake. We are delighted to have him on board and anticipate a long and fruitful relationship.

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2017 Beach Openings

OPEN 6/24 AND 6/25
SAT & SUN 11 AM – 6 PM
MON – FRI 12 PM – 5 PM

OPEN 6/24 AND 6/25
11 AM – 6 PM SAT & SUN

OPENS 7/2/17
SAT & SUN  12 PM – 6 PM

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Septic pumping discount RBL District — Mahopac Septic

Mahopac Septic

Mahopac Septic

RBL District discount — $20 off regular price

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Septic pumping discount RBL District — EarthCare


 Pumping cost is $220.00 for anything up to 1000 gallons

Over 1000 gallons is prorated by 250 gallons increments– $55.00 per 250 gallons.

 There is a $21.50 environmental disposal fee.

 Digging if necessary is a minimum of $40.00 depending on depth and difficulty. Technician will advise of price before digging.

 This cost is subject to State tax.

 Please Note: This cost cannot be combines with any other discount or offer.

Hours of Operation: Monday through Saturday. Any emergency service cost would be additional.

Erica Decoite

Customer Service Rep – EarthCare

P: 800-428-6166 | F: 973-764-6404



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Septic pumping discount RBL District –Fred A. Cook Jr. Inc.

Fred A. Cook Jr Inc.

$250.00 up to the first 1,000 gallons

$.18 per each additional gallon

$30.00  each foot of digging

Pricing is for services scheduled Monday -Friday between 8 am and 4 pm only. Pricing is not for Holiday or weekend service. emergency/Same Day service will be additionally charged. Price is based on tank being located within 150’from the Septic Truck.   *Not to be combined with any other offers*

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2017 RBLPOA Meetings and Events

2017 RBLPOA Residents’ Meetings

  • Saturday, June 24, 9:30 AM, at Children’s Beach
    • Agenda: State of the Lake 2017, Septic Pump-out Regulations, HAB and Weeds
    • Come. Ask questions. Get answers. Participate.
  • Saturday, July 8, 9:30 AM, at Children’s Beach   
    • invited guest: Sam Oliverio, Town Supervisor
  • Saturday, July 29, 9:30 AM, at Children’s Beach
  • Saturday, August 19, 9:30 AM, at Children’s Beach
    •          Elections for Officers and Board


2017 Regatta, August 5

  • Saturday, August 5, 10 am to 5 pm, at Children’s Beach

 2017 Fishing Tourney

  • Saturday, July 29, in the afternoon
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