Pollution in Door County, Wisconsin
As shown on the map, these lower currents carry polluted air from major urban areas.
[9] In 2022, the Environmental Protection Agency decided that the northern part of the county met its standard for ozone.
The newest is in a relatively shallow layer of sand and gravel, but tends to not to provide enough water except in the southeastern part of the county.
When the snow melted in the spring, the water coming up from one well changed 9 days later to reflect the character of the new meltwater.
It had one of the highest specific conductance measurements (995 μS/cm) among the springs studied, due to the minerals dissolved in the water.
[15] A study of wells, springs, and surface waters in six county wetlands took samples from September 2017 to June 2018.
In wells that are contaminated, bacterial concentrations peak during the following rains in the late summer and early fall.
[21] In 1968, 44 people on Washington Island were sickened with hepatitis, a food and water-borne disease, and one girl died.
[22] The porous and fractured dolomite bedrock was implicated as a factor in a June 2007 epidemic when 239 patrons and 18 employees[23] of the newly opened Log Den restaurant were sickened by a norovirus.
"[25] For transient non-community public wells such as the one supplying the restaurant, state only regulated for contaminants within a 200-foot radius unless flow studies had previously been done.
[26] In September 2014, 16 people feel ill from drinking wellwater after rainwater washed manure went down a sinkhole in Jacksonport.
[27] Short-term rentals are thought to contaminate the groundwater whenever more people stay in a house or cottage than the septic system was designed to handle.
[28] The Wisconsin Department of Natural Resources reports 137 leaking underground storage tank sites, 385 spill locations, and 104 other areas involving contamination, such as of soils and groundwater, including 24 cases which polluted one or more neighboring properties and 82 open cases such as cherry orchards left with arsenic and lead-contaminated soils from pesticide use during the 1960s and earlier.
Mines, prior landfills, and former orchard sites are considered impaired lands and specially marked on an electronic county map.
[34] A different electronic map shows the locations of private wells polluted with lead, arsenic, copper, and other contaminants down to the section level.
It changes direction at Pensaukee,[40] north of Long Tail Point and continues northward to Sturgeon Bay.
[52] After a rain, E. coli counts may increase up to three times the normal amount and persist at a higher concentration for up to 12 hours.
