Water Quality in Cass Lake, MN (56633)
EPA violation data for public water systems serving ZIP code 56633.
Past Health-Based Violations
2 health-based violations were found in the past 5 years, meaning contaminant levels exceeded federal safety limits. All have since been resolved. There are also 32 monitoring/reporting violations.
More violations than 86% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
4,802
Population
170
Water Systems
34
Violations (5yr)
2
Health-Based
Location
Loading map...
Water Systems Serving This Area (170)
Palace Casino
Groundwater 2,100 people served
0 violations
Northside
All resolved Groundwater 2,086 people served
3 violations (5yr)
· All resolved
Lead tested: 1.14 ppb (limit: 15 ppb) ✓
Northern Lights Casino
1 health-based Groundwater 1,650 people served
7 violations (5yr)
· 1 health-based · All resolved
Lead tested: 0 ppb (limit: 15 ppb) ✓ Copper tested: 1890 ppb (limit: 1300 ppb)
White Oak Casino
Groundwater 900 people served
0 violations
Tract 33
Groundwater 800 people served
0 violations
Cass Lake
Groundwater 691 people served
0 violations
Stony Point Resort
Groundwater 400 people served
0 violations
Ball Club
All resolved Groundwater 333 people served
3 violations (5yr)
· All resolved
Lead tested: 0 ppb (limit: 15 ppb) ✓
Bug School - Gymnasium
Groundwater 260 people served
0 violations
Bug-O-Nay-Ge-Shig High School
Groundwater 260 people served
0 violations
Cass Lake Lodge
Groundwater 250 people served
0 violations
Palace Junction
Groundwater 200 people served
0 violations
Pike Hole Bar & Restaurant
Groundwater 200 people served
0 violations
Marclay Point Resort
Groundwater 200 people served
0 violations
Inger
1 health-based Groundwater 186 people served
4 violations (5yr)
· 1 health-based · All resolved
Lead tested: 1.11 ppb (limit: 15 ppb) ✓
Palace Hotel
Groundwater 176 people served
0 violations
Highland Resort
Groundwater 160 people served
0 violations
Cass Lake West Side Acres
Groundwater 140 people served
0 violations
Bena
All resolved Groundwater 112 people served
3 violations (5yr)
· All resolved
Lead tested: 0 ppb (limit: 15 ppb) ✓
Break On The Lake Resort
Groundwater 110 people served
0 violations
Plantation
All resolved Groundwater 105 people served
3 violations (5yr)
· All resolved
Lead tested: 0 ppb (limit: 15 ppb) ✓
Camp Kamaji
Groundwater 100 people served
0 violations
Sunset Cove Resort
Groundwater 100 people served
0 violations
Sandtrap
Groundwater 100 people served
0 violations
Leech Lake Rbc
Groundwater 99 people served
0 violations
Ball Club Head Start
Groundwater 99 people served
0 violations
Leech Lake Rbc
Groundwater 99 people served
0 violations
Onigum Head Start School
Groundwater 99 people served
0 violations
Mission Community Center
Groundwater 99 people served
0 violations
Rock Springs Resort
Groundwater 90 people served
0 violations
Birch Ridge Resort
Groundwater 90 people served
0 violations
Camp Chippewa For Boys
Groundwater 85 people served
0 violations
Maple Leaf Resort
Groundwater 80 people served
0 violations
Kingdom Hall Of Jehovah'S Witnesses
Groundwater 75 people served
0 violations
Wishbone Resort
Groundwater 75 people served
0 violations
Sah Kah Tay Beach Llc.
Groundwater 75 people served
0 violations
Trinity Lutheran Church Elca
Groundwater 75 people served
0 violations
Bayshore Resort
Groundwater 70 people served
0 violations
Cass Lake West
Groundwater 64 people served
0 violations
Birch Villa Resort
Groundwater 60 people served
0 violations
Morning Star Resort
Groundwater 60 people served
0 violations
Horseshoe Resort
Groundwater 55 people served
0 violations
Oak Point Resort
Groundwater 50 people served
0 violations
Ojibway Resort
Groundwater 50 people served
0 violations
Norway Beach Resort
Groundwater 50 people served
0 violations
Little Wolf Resort
Groundwater 50 people served
0 violations
Ball Club North
Groundwater 45 people served
0 violations
Shangri La Resort
Groundwater 45 people served
0 violations
Sugar Point
Groundwater 45 people served
0 violations
Bemidji Head Start
All resolved Groundwater 45 people served
2 violations (5yr)
· All resolved
Lead tested: 1.88 ppb (limit: 15 ppb) ✓
Oak Point
All resolved Groundwater 45 people served
3 violations (5yr)
· All resolved
Lead tested: 1.06 ppb (limit: 15 ppb) ✓
Tom'S Harbor Owners Association
Groundwater 40 people served
0 violations
O & M'S Wings
Groundwater 35 people served
0 violations
Old Agency
All resolved Groundwater 30 people served
3 violations (5yr)
· All resolved
Lead tested: 0.93 ppb (limit: 15 ppb) ✓
Trees Homeowner'S Association
Groundwater 30 people served
0 violations
Saddle Bar
Groundwater 25 people served
0 violations
Cut Foot Sioux Warehouse Usfs
Groundwater 25 people served
0 violations
Plug Hat Point Picnic Area
Groundwater 25 people served
0 violations
Bug Vocational
Groundwater 25 people served
0 violations
Eichberg Minnows
Groundwater 25 people served
0 violations
Clubhouse Lake Rec Area South
Groundwater 25 people served
0 violations
Vfw Post No 722
Groundwater 25 people served
0 violations
Cottage Cafe
Groundwater 25 people served
0 violations
Three Lakes Resort
Groundwater 25 people served
0 violations
Ojibway Recreation Area
Groundwater 25 people served
0 violations
Ponderosa Ranch
Groundwater 25 people served
0 violations
Ron
Groundwater 25 people served
0 violations
Star Island Rec Area
Groundwater 25 people served
0 violations
Sugar Pt Head Start & Comm Ctr
Groundwater 25 people served
0 violations
Dick
Groundwater 25 people served
0 violations
Laundromat
Groundwater 25 people served
0 violations
Onigum Head Start
All resolved Groundwater 25 people served
2 violations (5yr)
· All resolved
Lead tested: 4.66 ppb (limit: 15 ppb) ✓
Ottertail Camp
Groundwater 25 people served
0 violations
Idle Hour Bar
Groundwater 25 people served
0 violations
Nushka Group Camp
Groundwater 25 people served
0 violations
Old Agency Cws
Groundwater 25 people served
0 violations
Do Nut Shop
Groundwater 25 people served
0 violations
A And W Drive-In
Groundwater 25 people served
0 violations
Central Shop
Groundwater 25 people served
0 violations
View Point Resort
Groundwater 25 people served
0 violations
Leroys Minnows
Groundwater 25 people served
0 violations
United Farm Agency
Groundwater 25 people served
0 violations
Ball Club Head Start
All resolved Groundwater 25 people served
1 violation (5yr)
· All resolved
Lead tested: 0 ppb (limit: 15 ppb) ✓
Long Pine Cafe
Groundwater 25 people served
0 violations
Minnewahkan (Concordia Language)
Groundwater 25 people served
0 violations
Anderson
Groundwater 25 people served
0 violations
Morning Star Camp
Groundwater 25 people served
0 violations
Marcell Benahouse Usfs
Groundwater 25 people served
0 violations
Jim'S Golden Grill
Groundwater 25 people served
0 violations
Omega Resort
Groundwater 25 people served
0 violations
Sneaky Pines Golf Club
Groundwater 25 people served
0 violations
Ball Club Community Center
Groundwater 25 people served
0 violations
Pine Acres
Groundwater 25 people served
0 violations
Big Wolf Resort, Inc.
Groundwater 25 people served
0 violations
Bena Roadside
Groundwater 25 people served
0 violations
Anglers Beach Resort
Groundwater 25 people served
0 violations
Birch Villa Resort
Groundwater 25 people served
0 violations
Hook
Groundwater 25 people served
0 violations
Mission
Groundwater 25 people served
0 violations
Wolf View Resort
Groundwater 25 people served
0 violations
Logjammerz Bar And Grill
Groundwater 25 people served
0 violations
American Legion Post 284
Groundwater 25 people served
0 violations
Longville Construction
Groundwater 25 people served
0 violations
Mission Com Water Supply
Groundwater 25 people served
0 violations
West End Cafe
Groundwater 25 people served
0 violations
Watershed Lab Usfs
Groundwater 25 people served
0 violations
Blackduck Ranger Station
Groundwater 25 people served
0 violations
Shady Rest Resort
Groundwater 25 people served
0 violations
Winnie Rec Area
Groundwater 25 people served
0 violations
Bay Shore Resort
Groundwater 25 people served
0 violations
Fontana'S
Groundwater 25 people served
0 violations
Plantation Wat Sup
Groundwater 25 people served
0 violations
Marcell Residence Usfs
Groundwater 25 people served
0 violations
Merv
Groundwater 25 people served
0 violations
Reedy
Groundwater 25 people served
0 violations
Leech Lake Tract 33
Groundwater 25 people served
0 violations
Richards Townsite
Groundwater 25 people served
0 violations
Jerry Lynch Bait Shop
Groundwater 25 people served
0 violations
Shingobee Old
Groundwater 25 people served
0 violations
Cass Lake West Housing
Groundwater 25 people served
0 violations
Onigum Community Center
Groundwater 25 people served
0 violations
Kago Lake
Groundwater 25 people served
0 violations
Webster Lake Picnic Area
Groundwater 25 people served
0 violations
Bug-O-Nay-Ge-Shing School
Groundwater 25 people served
0 violations
South Pike Bay West
Groundwater 25 people served
0 violations
West Winnie Campground Usfs
Groundwater 25 people served
0 violations
Mounds Resort
Groundwater 25 people served
0 violations
Palace Day Care
Groundwater 25 people served
0 violations
Webster Lake Campground
Groundwater 25 people served
0 violations
Squaw Point Housing
Groundwater 25 people served
0 violations
Six Mile Lake Campground
Groundwater 25 people served
0 violations
Longville Plbg And Htg
Groundwater 25 people served
0 violations
Longville Dairy
Groundwater 25 people served
0 violations
West Side Acres Cws
Groundwater 25 people served
0 violations
Chain-O-Lakes Resort
Groundwater 25 people served
0 violations
Woodtick Trailhead Usfs
Groundwater 25 people served
0 violations
Whispering Pines Motel
Groundwater 25 people served
0 violations
Northern Lights Day Care
Groundwater 25 people served
0 violations
Allen
Groundwater 25 people served
0 violations
Ball Club North Housing
Groundwater 25 people served
0 violations
Sailstar Campground/Court
Groundwater 25 people served
0 violations
Norway Beach Annex
Groundwater 25 people served
0 violations
Northwoods Store
Groundwater 25 people served
0 violations
Sanford Motel
Groundwater 25 people served
0 violations
Crescent Beach Resort
Groundwater 25 people served
0 violations
Inger Wat Sup
Groundwater 25 people served
0 violations
Lake N Woods Campground
Groundwater 25 people served
0 violations
Shogen Dam Rec Area Usfs
Groundwater 25 people served
0 violations
Noma Lake Picnic Area
Groundwater 25 people served
0 violations
Bena Water Sup
Groundwater 25 people served
0 violations
Buckhorn Resort
Groundwater 25 people served
0 violations
Longville Garage
Groundwater 25 people served
0 violations
Norway Beach Log House
Groundwater 25 people served
0 violations
Sugar Point Head Start/Community Center
Groundwater 25 people served
0 violations
Straight Arrow Resort
Groundwater 25 people served
0 violations
Pike Hole Resort
Groundwater 25 people served
0 violations
Lake Erin Wayside
Groundwater 25 people served
0 violations
Benjamin Picnic Usfs
Groundwater 25 people served
0 violations
Winchester Restaurant
Groundwater 25 people served
0 violations
Dick
Groundwater 25 people served
0 violations
Ball Club Wat Sup
Groundwater 25 people served
0 violations
Shepard'S Subs
Groundwater 25 people served
0 violations
Longville Campgrounds
Groundwater 25 people served
0 violations
Hoglunds Resort
Groundwater 25 people served
0 violations
Birches Picnic Usfs
Groundwater 25 people served
0 violations
Oakdale Grove Resort
Groundwater 25 people served
0 violations
Vic Cabin
Groundwater 25 people served
0 violations
Pine Acres Com Water Supply
Groundwater 25 people served
0 violations
Steamboat Lake Resort
Groundwater 25 people served
0 violations
Middle Pigeon Campground
Groundwater 25 people served
0 violations
Contaminants Found
Lead and Copper RuleHealth-Based
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
7 violations
All resolved
Revised Total Coliform RuleMonitoring
Missed testing deadlines — not a detection of bacteria.
9 violations
All resolved
ChlorineMonitoring
Used to disinfect water — generally safe at regulated levels.
7 violations
All resolved
CYANIDEMonitoring
7 violations
All resolved
LEAD AND COPPER RULE REVISIONSMonitoring
3 violations
All resolved
AsbestosMonitoring
1 violation
All resolved
Lead & Copper Levels
Lead (Pb)
Within limit1.11 ppb measured
Action level: 15 ppb
Sampled: Jul 2025
Copper (Cu)
Exceeds limit1890 ppb measured
Action level: 1300 ppb
Sampled: Jan 2022
How Does This Compare?
Cass Lake (56633) has more violations than 86% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 34.
Fewer violations 86th percentile More violations
Recommended Water Filters
Based on health-based violations detected in your area, these filter types are commonly used to address similar contaminants. Consult your water utility's Consumer Confidence Report for the most current data.
Reverse Osmosis System
Highly effective at removing heavy metals, dissolved solids, and a wide range of contaminants. Recommended for homes with lead or arsenic concerns.
Targets:Lead, Copper, Arsenic, Mercury, Cadmium
Look for:NSF/ANSI 58 certified
Always look for filters certified by NSF International for the specific contaminants you want to remove. This is general educational information, not an endorsement of any specific product.