Water Quality in Ann Arbor, MI (48118)
EPA violation data for public water systems serving ZIP code 48118.
Past Health-Based Violations
4 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 31 monitoring/reporting violations.
More violations than 85% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
13,246
Population
81
Water Systems
35
Violations (5yr)
4
Health-Based
Location
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Water Systems Serving This Area (81)
Ann Arbor
Surface water 241,868 people served
0 violations
Ypsilanti Community Utility Authority
Purchased surface water 53,988 people served
0 violations
Lead tested: 4.1 ppb (limit: 15 ppb) ✓
Ypsilanti Comm Utilities Auth
Purchased surface water 30,000 people served
0 violations
Chelsea
Groundwater 5,474 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Chrysler Llc
Groundwater 800 people served
0 violations
Fca Us Llc/Chelsea Prov Grnds
Groundwater 800 people served
0 violations
Dnr-Waterloo Rec Area-Sugarloaf Cg
Groundwater 660 people served
0 violations
Cassidy Lake S.A.I.
Groundwater 520 people served
0 violations
Waterloo Rec Area - Campground
Groundwater 500 people served
0 violations
Cassidy Lake S.A.I.
Groundwater 440 people served
0 violations
Triple Crane
Groundwater 300 people served
0 violations
Robin Hills Farm - Greenhouse & Market
All resolved Groundwater 300 people served
3 violations (5yr)
· All resolved
Sylvan Township
Groundwater 263 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Four Lakes Family Campground
Groundwater 260 people served
0 violations
Faith Baptist Church - Chelsea
Groundwater 200 people served
0 violations
St. Mary Catholic Church - Parish Hall
All resolved Groundwater 200 people served
2 violations (5yr)
· All resolved
St. Mary Catholic Church - Church
All resolved Groundwater 200 people served
2 violations (5yr)
· All resolved
Orchid Macdee, Llc
All resolved Groundwater 130 people served
1 violation (5yr)
· All resolved
Lead tested: 0 ppb (limit: 15 ppb) ✓
New Harvest Church
All resolved Groundwater 100 people served
1 violation (5yr)
· All resolved
Revel Run - Party Barn
All resolved Groundwater 100 people served
1 violation (5yr)
· All resolved
All Star Sports Bar
Groundwater 100 people served
0 violations
Revel Run
All resolved Groundwater 100 people served
1 violation (5yr)
· All resolved
Camp Wathana-Dining Hall
Groundwater 100 people served
0 violations
Dnr-Waterloo Rec Area-Dte Bike Tr M-52
Groundwater 100 people served
0 violations
Chelsea Gas And Goods
All resolved Groundwater 100 people served
4 violations (5yr)
· All resolved
Robin Hills - Livestock Barn/Empl Breakr
All resolved Groundwater 100 people served
3 violations (5yr)
· All resolved
North Lake United Methodist Church
All resolved Groundwater 100 people served
1 violation (5yr)
· All resolved
Chelsea Church Of The Nazarene
All resolved Groundwater 100 people served
1 violation (5yr)
· All resolved
Chelsea Church Of Christ
Groundwater 100 people served
0 violations
St Louis Sch For Boys-Sch Bldg
Groundwater 90 people served
0 violations
St Louis Sch For Boys-St J Hal
Groundwater 90 people served
0 violations
Chelsea Lumber
Groundwater 80 people served
0 violations
Dnr-Waterloo Rec Area-Green Lake
Groundwater 75 people served
0 violations
St Paul United Ch Of Christ
Groundwater 73 people served
0 violations
Dnr Waterloo R A Crooked Lake
Groundwater 70 people served
0 violations
Michigan Conservation Clubs
All resolved Groundwater 65 people served
1 violation (5yr)
· All resolved
Cauanaugh Lakeview Farm
Groundwater 60 people served
0 violations
Green Acres Driving Range
Groundwater 60 people served
0 violations
St. Louis Center
4 health-based Groundwater 56 people served
7 violations (5yr)
· 4 health-based · All resolved
Lead tested: 0 ppb (limit: 15 ppb) ✓
Dnr-Waterloo Rec Area-Dte Bike-Cassidy
Groundwater 50 people served
0 violations
Waterloo Recreation Equestrian Staging A
Groundwater 50 people served
0 violations
Mill Pond Bread
Groundwater 50 people served
0 violations
Avila Daycare Center
All resolved Groundwater 50 people served
1 violation (5yr)
· All resolved
Art Moehn Chevrolet Buick
All resolved Groundwater 50 people served
1 violation (5yr)
· All resolved
Dnr Waterloo R A-Horsemans Cg
Groundwater 40 people served
0 violations
Friends Lake Community Inc
Groundwater 40 people served
0 violations
Zion Lutheran Church - Chelsea
Groundwater 40 people served
0 violations
Cavanaugh Lakeview Farms Ltd
Groundwater 40 people served
0 violations
Camp Wathana-Watona
Groundwater 30 people served
0 violations
Chelsea Grinding Co.
Groundwater 30 people served
0 violations
Dnr-Waterloo Rec Area-Mill Lake Outdoor
Groundwater 30 people served
0 violations
Camp Wathana-Kikewagan & Manuka
Groundwater 30 people served
0 violations
Camp Wathana-Yawanoh
Groundwater 30 people served
0 violations
Chelsea Rod & Gun Club
Groundwater 30 people served
0 violations
Ann Arbor Wastewater Treat Plt
Groundwater 30 people served
0 violations
Riding Stables - Waterloo Rec Area
Groundwater 25 people served
0 violations
Daniels Enterprises
Groundwater 25 people served
0 violations
Stuckeys Pecan Shop
Groundwater 25 people served
0 violations
Pierce Lake Golf Course
Groundwater 25 people served
0 violations
Stivers
Groundwater 25 people served
0 violations
Dnr Waterloo R A Sugarloaf
Groundwater 25 people served
0 violations
The Point
Groundwater 25 people served
0 violations
Inverness Country Club-Proshop
Groundwater 25 people served
0 violations
Chrysler Llc
Groundwater 25 people served
0 violations
Trudex Corp
Groundwater 25 people served
0 violations
Dnr-Waterloo Rec Area-Horsemans Staging
Groundwater 25 people served
0 violations
St. John'S United Church
Groundwater 25 people served
0 violations
Tuttle Spring Design
Groundwater 25 people served
0 violations
Dnr Waterloo Rec. Area
Groundwater 25 people served
0 violations
Friends Lake Community
Groundwater 25 people served
0 violations
Fca Chelsea Proving Grounds Adas Buildin
All resolved Groundwater 25 people served
2 violations (5yr)
· All resolved
Lead tested: 0 ppb (limit: 15 ppb) ✓
Dnr-Waterloo Rec Area-Horeseman'S Cg
Groundwater 25 people served
0 violations
Inverness Country Club House
All resolved Groundwater 25 people served
2 violations (5yr)
· All resolved
Dnr-Waterloo Horsemans Cg
Groundwater 25 people served
0 violations
F&J Rental Properties, Llc
Groundwater 25 people served
0 violations
Dnr-Waterloo Sugarloaf Cg
Groundwater 25 people served
0 violations
Michigan Friend Center
All resolved Groundwater 25 people served
1 violation (5yr)
· All resolved
Dnr-Waterloo Rec Area-Eddy Center
Groundwater 25 people served
0 violations
Seva Foundation
Groundwater 25 people served
0 violations
Chrysler Llc
Groundwater 25 people served
0 violations
Inverness Inn
Groundwater 0
0 violations
Contaminants Found
ArsenicHealth-Based
A naturally occurring element that can cause cancer and other health effects at high levels.
4 violations
All resolved
Revised Total Coliform RuleMonitoring
Missed testing deadlines — not a detection of bacteria.
21 violations
All resolved
NitrateMonitoring
At high levels, nitrate can cause blue baby syndrome in infants.
7 violations
All resolved
Lead and Copper RuleMonitoring
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
2 violations
All resolved
StyreneMonitoring
1 violation
All resolved
Lead & Copper Levels
Lead (Pb)
Within limit4.1 ppb measured
Action level: 15 ppb
Sampled: Jan 2025
How Does This Compare?
Ann Arbor (48118) has more violations than 85% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 35.
Fewer violations 85th 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.