Torrential rains caused widespread problems across the region this summer, ruining crops, washing out roads and flooding homes.
But there鈥檚 another, often unnoticed, consequence of all that rainwater pouring onto the ground 鈥� private wells are getting contaminated.
established in September 2022 saw more wells contaminated with coliform bacteria this summer, according to Mike Dietz, an extension educator, and director of the 黑料吃瓜网 Institute of Water Resources.
Half of the water samples at the lab were positive for total coliform this summer, up from 30% in months prior, Dietz said. It鈥檚 a concern, because 黑料吃瓜网鈥檚 thousands of private wells are less regulated than city water.
鈥淎ny public water supplier is required to test that water frequently, and have to meet all the EPA Safe Drinking Water Act requirements,鈥� Dietz said. 鈥淧rivate well owners are only required to do that when the well goes in. The responsibility is on every person that owns that well.鈥�
Coliform itself isn鈥檛 dangerous, but can indicate the presence of from shallow groundwater leaking into residential wells, like E. coli,
According to the state Department of Public Health, about rely on private wells. Currently, the EPA does not regulate private wells or provide recommended standards 鈥� and the state doesn鈥檛 require 黑料吃瓜网 homeowners to test their wells annually. Because of this, testing doesn鈥檛 happen enough.
Dietz said residents should test every one or two years, and testing if there is local flooding.
Wells with positive coliform samples are typically disinfected with bleach, a process which takes at least a week to complete. Then the lab tests the water again to ensure it鈥檚 safe. Health experts until the issue is corrected.
This newer testing program at UConn doesn鈥檛 have a long-term record to compare data, Dietz said. According to state Department of Health spokesperson Christopher Boyle, before Oct. 1, 2022, DPH was not receiving water quality test results from private commercial laboratories that test private wells for contamination. Now, that all private well test results submitted to the DPH be kept confidential.
Boyle added that the department can鈥檛 easily draw conclusions on well-related health issues 鈥� individuals with gastrointestinal symptoms that may have been impacted by such bacterial contamination aren鈥檛 required to report their illness to the DPH.
As larger, more powerful storms are predicted to continue with climate change, excess rain poses more of a risk to water quality in rural areas.
鈥淲hen we have a lot of rainfall 鈥� like we have this past summer 鈥� that excess rain gets down into the shallow groundwater, and can change the way that shallow groundwater moves and gets into the well itself,鈥� Dietz said.
He added that his team is looking to continue the grant-funded program to expand the contaminants they can test for, and continue offering testing to residents at a low cost.
Information on certified labs and water testing through local and state health departments.
This story has been updated.
