Suffolk Closeup: A water pollution solution

04/29/2016 12:00 PM |

lawn

In an effort to reduce the amount of nitrogen getting into bays and other water bodies and to protect groundwater, Suffolk County Legislator Bill Lindsay (D-Holbrook) has introduced a measure aimed at reducing the application of fertilizer.

A moderate amount of fertilizer produces greener grass. But “over-fertilization can be harmful to both your lawn and the environment and it wastes money,” as Cornell Cooperative Extension (CCE) reports in its online fact-sheet titled “How Best To Fertilize Your Lawn,” which can be found on the CCE website.

Mr. Lindsay’s concern is the nitrogen component of fertilizer and how it contributes to the nitrogen discharges that have been raising havoc in waterways in Suffolk, causing brown and red tides and killing marine life.

Initially, the bill introduced by Mr. Lindsay was to bar the “application and sale” of fertilizer with more than 10 percent nitrogen and 5 percent water soluble nitrogen. Fertilizer with a lower percentage of nitrogen is commercially available, but so is fertilizer with 20, 30 and 40 percent nitrogen and more. (You can tell the nitrogen percentage by the first three numbers on a fertilizer bag. For example, if it says “10-10-10,” the fertilizer contains 10 percent nitrogen, 10 percent phosphate and 10 percent potash.)

However, at an April 12 Suffolk Legislature public hearing, a lineup of landscapers, nursery owners and representatives of fertilizer manufacturing companies complained about the limits proposed in the bill. Mr. Lindsay held follow-up discussions.

The county is now considering, Mr. Lindsay said last week, limiting to seven-tenths of a pound the amount of nitrogen contained in fertilizer spread in one application over 1,000 square feet of land. Also, there would be a “per season” limit of three pounds of nitrogen on 1,000 square feet. Implementation will focus, he said, on the “point of sale.” And the initiative will be accompanied by an “educational program.”

However, changes in the bill are still being worked on and are “not finalized.”

Mr. Lindsay said he regards his bill as an economic measure as well as an environmental one. Because of degradation of Suffolk waters, which marine scientists attribute largely to nitrogen loading, “We’re spending so much money trying to clean up our waterways,and a significant portion of our economy depends on them,” the legislator said. “This is about limiting the nitrogen being utilized.”

A resident of Oakdale, Mr. Lindsay points to how portions of Great South Bay in his legislative district have been impacted.

The proposed bill notes that Suffolk “has already taken action to reduce the excessive use of nitrogen based fertilizers by enacting a local law to prohibit the application of fertilizers between November 1 and April 1 every year.” But “more can be done,” it says.

The measure would not apply to “farm operations,” golf courses or athletic fields.

It would, however, cover not just homeowners but commercial fertilizer applicators.

As for Shelter Island and the rest of the East End, Kevin McDonald, chair of the Peconic Estuary Program Citizens Advisory Committee and an official with The Nature Conservancy said the Peconic Bay system has also been hurt badly by nitrogen discharges.

“While lawn care fertilizers are only one source of the negative impacts regarding water quality, everyone can change their property maintenance practices today and lessen these impacts immediately,” Mr. McDonald said. “Each of us as individuals, as well as industry, has to do a part. Limiting fertilizer use is the quickest, most immediate and least costly way to reduce nitrogen pollution to our groundwater and our beaches, bays and harbors in Suffolk. The huge amount of nitrogen pollution entering our groundwater and traveling through it into our surface waters is so much greater than these sensitive natural systems can bear. Reductions from all sources — no matter how small they might be — must be considered. The easiest and cheapest place to start is with residentially applied turf and garden fertilizers.”

Doug Wood, associate director of Grassroots Environmental Education, said: “Lawn fertilizer accounts for anywhere from 7 to 11 percent or more of our nitrogen problem.” Moreover, “We don’t have to wait for some expensive new technology; the solution to the problem is within our reach right now, today.”

Karl GrossmanKarl Grossman’s syndicated “Suffolk Closeup” column is printed in the Shelter Island Reporter, a Times Review Media Group publication.

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