Draft plan eyes projects to mitigate key pollutant in lake
By Zachary Matson
Editor’s note: This story has been updated with a new, extended deadline of April 5 for public comments to the plan
New York continues to fall short of phosphorus targets in Lake Champlain, and a new state plan outlines strategies to minimize the key nutrient and major contributor to algal blooms.
The state’s draft Lake Champlain Watershed Implementation Plan aims to meet phosphorus limits known as the Total Maximum Daily Load (TMDL), or the amount of phosphorus that can be “loaded” into the lake from different sources and at different locations without imperiling the lake’s many uses.
Eric Howe, director of the Lake Champlain Basin Program, likened the lake’s TMDLs to a “pollutant diet for a lake.” That diet is divided between New York and Vermont and is required under the federal Clean Water Act.
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Since the lake’s original TMDL was adopted in 2002, millions of dollars of federal, state and local money has been invested in upgrading wastewater plants, improving agricultural practices and limiting erosion in Lake Champlain’s massive watershed.
“The challenge is despite efforts across the entire Lake Champlain basin in New York, Vermont and in Quebec to reduce phosphorus loading, the amount of phosphorus delivered to the lake has continued to increase in the past 20 years,” Howe said.
The total phosphorus load to the lake was estimated at 647 metric tons per year during the 1991 hydrologic base year, according to TMDL documents. The current phosphorus load estimated in Lake Champlain now is above 900 metric tons per year.
Howe said the investments have paid off, citing significant improvements to how phosphorus is treated at wastewater plants in the watershed and noting that phosphorus pollution would have been much worse without steps to limit it under the TMDL mandate. The wastewater treatment plants on both sides of the lake are discharging less phosphorus than their allocations.
“What would the lake look like if we had not done all of that work over the years?” Howe said.
Up for public comment through April 5, the draft plan outlines the latest data on phosphorus loading from New York tributaries to the lake and lists state-funded programs that aim to reduce phosphorus.
Meanwhile, New York is working to update the underlying phosphorus limits that make up the TMDLs for the state’s portion of the watershed. The update, which must commence by 2026, will account for new science and provide for a fresh public engagement process.
The federal Environmental Protection Agency updated the Vermont TMDLs in 2016 after the original limits were challenged in court, increasing allocations on that side of the lake by nearly 25%.
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The bulk of phosphorus pollution in the lake originates from Vermont, estimated to currently contribute around 631 metric tons per year, about three times New York’s contribution. Agriculture is the top source of phosphorus across the watershed.
New York represents 37% of the watershed’s land area, nearly 90% of which is forested land. Vermont accounts for 56% of the watershed, and 7% of the land is in Quebec. For TMDL planning, the lake is divided into 13 segments, seven of which include part of New York. Each segment has a target specific to its conditions.
New York’s current overall phosphorus allocation is 119 metric tons per year, but its actual loading is estimated at around 211 metric tons per year.
Lake Champlain basin grants coming soon
The federal Bipartisan Infrastructure Law approved in 2021 boosted funding to the Lake Champlain Basin Program by a total of $40 million over five years.
The federal funding will boost the basin program’s ability to invest in projects around the lake to protect land, fund farm practices that minimize phosphorus, improve erosion controls and conserve wetlands.
The basin program plans to award around $13 million in grants this year. Howe said grant programs would be open for submission in the coming weeks. The grants will include funds for:
- Supporting tree nurseries, towns and watershed organizations to increase the supply and the lower the cost of plants used to buffer stream corridors;
- Helping towns and groups purchase equipment used to combat invasive species;
- Supporting projects to conserve or restore wetland areas on the New York side of the basin;
- Removing and replacing undersized culverts and other barriers that limit important passage for aquatic species.
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Todd Miller says
Clearly, Vermont has to do better in reducing their load of phosphorous into Lake Champlain. Based on the data presented in this article, Vermont produces roughly twice as much of phosphorous per acre that washes into Lake Champlain than does New York.
Thomas W Mangum says
Well Vermont should take a big cost to change their situation and what they are doing to this lake of history and it’s beauty the more they ignore what they are doing it’s going to cost them more than they can afford wake up Vermont and pay attention to what you are doing your not going to cover it up and get over on your neighboring state of New York I grew up in Plattsburgh you want to be called the green mountain state well all your Green can go to clean the lake up and this can mean higher taxes for all of you in Vermont wake up and help with keeping the lake up and too preserve it for many future generations please I can’t stress this enough this is one of many of God’s creations of beauty and Vermont wants us the state of New York to pay for their stupidity not happening Vermont your state will die out long before this beautiful state of New York and the Adirondacks is this is my childhood home and always will be there is nothing more beautiful to me then these mountains and woodlands and you should feel the same as I and anyone who grew up in the Adirondacks mountains do your part of helping too keep it up and for generations to come thank you Thomas W Mangum Plattsburgh New York.