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Groundwater Protection List

List of pesticide active ingredients that could affect groundwater

The Groundwater Protection List refers to a list of pesticide active ingredients that could potentially impact groundwater due to their chemical characteristics and toxicological profile.

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Active Ingredients by Category

Herbicides

Insecticides

Fungicides

  • Acetochlor*
  • Acifluoren
  • Alachlor
  • Aldicarb
  • Atrazine
  • Bentazon
  • Bromacil
  • Cyanazine
  • Chlorthal-Dimethyl**
  • Dimethanamid
  • Diuron
  • Flufenacet
  • Fluthiacet-methyl
  • MCPA
  • Metolachlor
  • Metribuzin
  • PCP
  • Pronamide
  • Propazine
  • Simazine
  • Sulfentrazone
  • Aldicarb
  • Carbofuran
  • Dinotefuran
  • Disulfoton
  • Fenamiphos
  • Fonofos
  • Lindane
  • Methoxyfenozide
  • PCP
  • Propoxur
  • Terbufos
  • Thiamethoxam
  • Chlorothalonil
  • Cyflufenamid
  • Cyproconazole
  • Folpet
  • Kresoxim-Methyl
  • Triticonazole
  • Sedaxane

*Acetochlor update, Spring 2018:  The State-Limited Use permit requirement for Acetochlor-based products has been removed.

** Chlorthal-dimethyl is more commonly known by its trade name: Dacthal

Important Notes

Pesticide Products which are aerosols, paints, baits, animals and human products and pool products are exempt from the regulations. All pesticide products which contain active ingredients on the Groundwater Protection List are Restricted Use Products.

Very Important
If you are using any of the pesticides on the Groundwater Protection List within a town that is listed on the Zone II List, check to see if you are operating within a Zone II. New wells can be created and new Zone II areas delineated. 

Note 
Pesticide Products which are aerosols, paints, baits, animals and human products as well as pool products are exempt from the regulations

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