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 Stewart, Minnesota (Round 2)

Site Information
Location: Stewart, MN
Population: 600
Address: 841 Croyden St.
Stewart, MN 55385
Contact: James Kalenberg, Mayor
Demonstration Site: 841 Croyden St.
Enclosed Space: 300 ft2
Source Water: Ground Water
Maximum Daily Flow: 65,000 gpd
Existing Treatment: ADEdge Iron Removal with Iron Media AD33
Arsenic Removal Technology: ADEdge Iron Removal with Iron Media AD33
Disposal Option: Sewer


Project Status
Cooperative Research and Development Agreement (CRADA) signed Completed
CRADA approved by legal Completed
EPA/contractor site visit Completed
Contractor/system agreement Completed
Plans submitted Completed
Plans approved Completed
Equipment installed Completed
Study began Completed
Study completed Completed
Six-month report cleared N/A
Final report cleared N/A


Source Water Quality
Analysis mg/L Analysis mg/L
Total As 0.039 pH – Units 7.8
As (III) 0.039 Ca 115
As (V) 0 Mg 115
Fe 1.4 Na 87
Mn 0.024 Chloride 6.5
PO4 – P 0.02 Hardness as CaCO3 230
SiO2 24 T. Alkalinity as CaCO3 415
SO4 7.4 TOC 6.8

Note: All data provided by utility except as noted.


Tom Sorg

See Also

Fact Sheet, EPA’s Water Treatment Demonstration Project to Reduce Amount of Arsenic in Stewart, MN, Drinking Water (PDF) (2 pp, 128 KB) June 2006

Federal Register Environmental Documents: Arsenic Treatment Demonstrations

How to Participate

Demo Site Information form (PDF) (2 pp, 57 KB)

Frequently Asked Questions

Publications on Arsenic

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