Water Quality in Oswego, IL (60450)
EPA violation data for public water systems serving ZIP code 60450.
Active Health Violations
7 health-based violations found in the past 5 years, with at least one still unresolved. Contaminant levels have exceeded federal safety limits. Consider testing your tap water independently.
More violations than 96% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
20,783
Population
141
Water Systems
92
Violations (5yr)
7
Health-Based
Location
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Water Systems Serving This Area (141)
Oswego
All resolved Groundwater 38,169 people served
2 violations (5yr)
· All resolved
Yorkville
All resolved Groundwater 23,000 people served
1 violation (5yr)
· All resolved
Morris
Groundwater 14,775 people served
2 violations (5yr)
Lead tested: 3.41 ppb (limit: 15 ppb) ✓
Constellation Dresden Station
1 health-based Groundwater 811 people served
1 violation (5yr)
· 1 health-based · All resolved
Lead tested: 0 ppb (limit: 15 ppb) ✓
First Christian Church (138818)
Groundwater 800 people served
0 violations
Equistar Chemicals Lp
Groundwater 600 people served
20 violations (5yr)
Commonwealth Edison
Groundwater 520 people served
0 violations
Grundy County Fairgrounds
Groundwater 500 people served
0 violations
Port Of Call
Groundwater 485 people served
0 violations
Rockwell Inn
Groundwater 400 people served
0 violations
Express Lane Gas And Food Inc.
Groundwater 400 people served
0 violations
Morris Coffee Shop
Groundwater 400 people served
0 violations
Grundy County Fairgrounds
Groundwater 300 people served
0 violations
Commonwealth Edison
Groundwater 300 people served
0 violations
Downers Grove Sportsman Club
Groundwater 300 people served
2 violations (5yr)
Grundy County Fairgrl N Well
Groundwater 300 people served
0 violations
Morris Country Club
Groundwater 300 people served
0 violations
Lakes Country Club
All resolved Groundwater 300 people served
1 violation (5yr)
· All resolved
Drake'S Farm Restaurant
Groundwater 275 people served
0 violations
Morris Family Restaurant
Groundwater 250 people served
0 violations
Goose Lake Prairie State Park
Groundwater 250 people served
0 violations
Northern Petrochemical Co
Groundwater 250 people served
0 violations
Alumax Corp
Groundwater 250 people served
0 violations
Alumax Corp
Groundwater 250 people served
0 violations
Rsbp Banquet Hall
Groundwater 200 people served
0 violations
Exelon Nuclear Inprocessing Ct
Groundwater 200 people served
0 violations
Honest Abes Tap And Grill
1 health-based Groundwater 162 people served
3 violations (5yr)
· 1 health-based
Nigas Northern Il Gas Corp
Groundwater 150 people served
0 violations
East Brooklyn
Groundwater 140 people served
0 violations
Orica Nitrogen
Groundwater 130 people served
0 violations
Twice The Ice Ice House Coal City
Purchased surface water 100 people served
0 violations
Sam'S Restaurant
Groundwater 100 people served
0 violations
Cafe Cabaret
Groundwater 100 people served
0 violations
Airport Snack Shop
Groundwater 100 people served
0 violations
Church Of Christ
Groundwater 100 people served
0 violations
Church Of Christ
Groundwater 100 people served
0 violations
Loyal Order Of Moose #967
Groundwater 100 people served
0 violations
Dresden Island Lock And Dam
Groundwater 100 people served
0 violations
Jensie'S
Groundwater 100 people served
0 violations
Nouryon Surface Chemistry Llc
All resolved Groundwater 100 people served
4 violations (5yr)
· All resolved
Lead tested: 9.1 ppb (limit: 15 ppb) ✓
General Electric-Morris
Groundwater 100 people served
0 violations
Goose Lake Prairie St.Pk. Work
Groundwater 100 people served
0 violations
Heatherfield Subdivision
Groundwater 90 people served
1 violation (5yr)
A P Green Refractories
Groundwater 80 people served
0 violations
A P Green Refractories
Groundwater 80 people served
0 violations
Northfield Block Company 2
All resolved Groundwater 75 people served
2 violations (5yr)
· All resolved
Hatcher Recreation Area
Groundwater 75 people served
0 violations
First Christian Church Pre-Sch
Groundwater 75 people served
0 violations
Northfield Block Company 3
All resolved Groundwater 75 people served
1 violation (5yr)
· All resolved
Bell'S Landing
Groundwater 75 people served
0 violations
Bell'S Landing
Groundwater 75 people served
0 violations
Bi-Met Inc
Groundwater 60 people served
0 violations
Ridgecrest North Subdivision
Groundwater 60 people served
8 violations (5yr)
Lead tested: 7 ppb (limit: 15 ppb) ✓
N I Gas (S N G Plant)
Groundwater 52 people served
0 violations
Faith Baptist Church
Groundwater 50 people served
0 violations
M & M Specialties Ltd
Groundwater 50 people served
0 violations
Armak Co C/O Jerry Erzen
Groundwater 50 people served
0 violations
Aux Sable
Groundwater 50 people served
0 violations
I&M Canal Aux Sable Access #1
Groundwater 50 people served
0 violations
Grace Baptist Church
Groundwater 50 people served
0 violations
Grace Lutheran Church
Groundwater 50 people served
0 violations
Amoco Oil Service Sta
Groundwater 50 people served
0 violations
Faith Baptist Church
Groundwater 50 people served
0 violations
Aux Sable Liquid Products Inc
Groundwater 50 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Waupecon Valley Handpump
Groundwater 50 people served
0 violations
Grace Lutheran Church
Groundwater 50 people served
0 violations
Nettle Creek School
All resolved Groundwater 50 people served
3 violations (5yr)
· All resolved
Lead tested: 0 ppb (limit: 15 ppb) ✓
Grace Baptist Church
Groundwater 50 people served
0 violations
Erienna Grade School
Groundwater 50 people served
0 violations
Whispering Pines Camper Sales
Groundwater 50 people served
0 violations
Hawthorn Estates Subdivision
Groundwater 49 people served
3 violations (5yr)
Lead tested: 0.63 ppb (limit: 15 ppb) ✓
Morris Country Club
Groundwater 45 people served
0 violations
Gippers Ii
Groundwater 45 people served
0 violations
Att Services Morris
Groundwater 42 people served
0 violations
Dresden Lakes Fishing Kamp
Groundwater 40 people served
0 violations
Royal Yacht Club
Groundwater 35 people served
0 violations
Royal Yacht Club
Groundwater 35 people served
0 violations
Dresden Island Lock & Dam
Groundwater 35 people served
0 violations
Gebbard Woods State Park
Groundwater 30 people served
0 violations
N C O
Groundwater 30 people served
0 violations
Stockdale Fertilizer Co
Groundwater 30 people served
0 violations
Dresden Lakes Fishing Kamp
Groundwater 30 people served
0 violations
General Electric-Edward Secko
Groundwater 25 people served
0 violations
Rainbow Council Scout Reservat
Groundwater 25 people served
0 violations
Goose Lake Twp Hall
Groundwater 25 people served
0 violations
Our Savior Lutheran Church
Groundwater 25 people served
0 violations
Goose Lake Club - Main Well
Groundwater 25 people served
0 violations
Kingdom Hall Jehova Witness
Groundwater 25 people served
0 violations
Grundy County Agricultural Dis
Groundwater 25 people served
0 violations
Rockwell Inn
Groundwater 25 people served
0 violations
Standing In The Word Ministries
Groundwater 25 people served
0 violations
Morris Construction Company
Groundwater 25 people served
0 violations
Kingdom Hall Jehova Witness
Groundwater 25 people served
0 violations
Grundy County Rod & Gun Club
Groundwater 25 people served
0 violations
First Christian Church
Groundwater 25 people served
0 violations
Goose Lake Prairie State Park (93856)
Groundwater 25 people served
0 violations
Shabbona Camping Resort
Groundwater 25 people served
0 violations
Morris Fruit Market
Groundwater 25 people served
0 violations
Material Service Corp
Groundwater 25 people served
0 violations
K & K Well & Pump
Groundwater 25 people served
0 violations
Morris Construction Company
Groundwater 25 people served
0 violations
Bower Home Sales
Groundwater 25 people served
0 violations
Pine Bluff Animal Hospital
Groundwater 25 people served
0 violations
Junior Acres Preschool
Groundwater 25 people served
0 violations
Constellation Midwest Fire Training Acad
Groundwater 25 people served
0 violations
Morris Boat Club Inc
Groundwater 25 people served
0 violations
Our Savior Lutheran Church
Groundwater 25 people served
0 violations
I&M Canal Aux Sable Access #2
Groundwater 25 people served
0 violations
Bi-Met
Groundwater 25 people served
0 violations
Hatcher Woods Recreational Ass
Groundwater 25 people served
0 violations
H B Fuller
1 health-based Groundwater 25 people served
12 violations (5yr)
· 1 health-based · All resolved
Lead tested: 9.3 ppb (limit: 15 ppb) ✓
Goose Lake Club
Groundwater 25 people served
0 violations
Great Water Usa
Purchased groundwater 25 people served
0 violations
Rainbow Council Scout Res Care
Groundwater 25 people served
0 violations
John Deere - Walker Sales
Groundwater 25 people served
0 violations
Waupecan Valley Park
Groundwater 25 people served
0 violations
Bower Home Sales
Groundwater 25 people served
0 violations
Faith Baptist Church Morris
All resolved Groundwater 25 people served
2 violations (5yr)
· All resolved
Northfield Block Company 1
All resolved Groundwater 25 people served
2 violations (5yr)
· All resolved
Royal Yacht Club
Groundwater 25 people served
0 violations
Bennet Explosives
Groundwater 25 people served
0 violations
Morris Fruit Market
Groundwater 25 people served
0 violations
Grundy County Agricultural Dis
Groundwater 25 people served
0 violations
Barr'S Camp
Groundwater 25 people served
0 violations
Lisbon North, Inc.
All resolved Groundwater 25 people served
16 violations (5yr)
· All resolved
Lead tested: 0 ppb (limit: 15 ppb) ✓
Pine Bluff Animal Hospital
Groundwater 25 people served
0 violations
Indian Creek Ranch Club
Groundwater 25 people served
0 violations
Illinois Youth Center
Groundwater 25 people served
0 violations
Morris Boat Club
Groundwater 25 people served
0 violations
Lake View Restaurant
Groundwater 25 people served
0 violations
Loyal Order Of Moose
Groundwater 25 people served
0 violations
Goose Lake Club
Groundwater 25 people served
0 violations
Saratoga Twp Hall
Groundwater 25 people served
0 violations
John Deere - Walker Sales
Groundwater 25 people served
0 violations
Saratoga Twp Hall
Groundwater 25 people served
0 violations
Goose Lake Twp Hall
Groundwater 25 people served
0 violations
Junior Acres Preschool
Groundwater 25 people served
0 violations
Goose Lake Prairie State Park (147389)
Groundwater 25 people served
0 violations
Material Service Corp
Groundwater 25 people served
0 violations
Barr'S Camp
Groundwater 25 people served
0 violations
Seneca Mobile Homes Llc
4 health-based Groundwater 10 people served
6 violations (5yr)
· 4 health-based · All resolved
Lead tested: 13.5 ppb (limit: 15 ppb) ✓
Contaminants Found
Combined Radium (-226 and -228)Health-Based
6 violations
All resolved
Revised Total Coliform RuleHealth-Based
Missed testing deadlines — not a detection of bacteria.
6 violations
All resolved
LEAD AND COPPER RULE REVISIONSHealth-Based
4 violations
Has active
Lead and Copper RuleMonitoring
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
10 violations
Has active
Consumer Confidence RuleMonitoring
Annual water quality report delivery requirement.
8 violations
Has active
Public NoticeMonitoring
8 violations
Has active
NitrateMonitoring
At high levels, nitrate can cause blue baby syndrome in infants.
4 violations
All resolved
ChlorineMonitoring
Used to disinfect water — generally safe at regulated levels.
3 violations
All resolved
BariumMonitoring
2 violations
All resolved
MercuryMonitoring
2 violations
All resolved
Antimony, TotalMonitoring
2 violations
All resolved
Thallium, TotalMonitoring
2 violations
All resolved
SeleniumMonitoring
2 violations
All resolved
ChromiumMonitoring
2 violations
All resolved
CYANIDEMonitoring
2 violations
All resolved
CadmiumMonitoring
2 violations
All resolved
Beryllium, TotalMonitoring
2 violations
All resolved
ArsenicMonitoring
A naturally occurring element that can cause cancer and other health effects at high levels.
2 violations
All resolved
StyreneMonitoring
1 violation
All resolved
EthylbenzeneMonitoring
1 violation
All resolved
TolueneMonitoring
1 violation
All resolved
TTHMMonitoring
1 violation
All resolved
Total Haloacetic Acids (HAA5)Monitoring
1 violation
All resolved
Lead & Copper Levels
Lead (Pb)
Within limit3.41 ppb measured
Action level: 15 ppb
Sampled: Jul 2025
How Does This Compare?
Oswego (60450) has more violations than 96% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 92.
Fewer violations 96th 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
UV Water Purifier
Uses ultraviolet light to neutralize bacteria, viruses, and parasites without chemicals. Ideal for homes with microbial contamination concerns.
Targets:E. coli, Coliform, Giardia, Cryptosporidium
Look for:NSF/ANSI 55 (Class A) 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.