[City of Iowa City]

1999 Consumer 
Confidence Report 

 [faucet]

IOWA CITY WATER DIVISION
Page 1Page 2Page 3Page 4Page 5

1998 DRINKING WATER QUALITY REPORT
SUBSTANCE
HIGHEST LEVEL
ALLOWED (MCL)
IOWA CITY
COMPLIANCE
RESULTS
IOWA CITY
RANGE
EPA MCLG
(EPA GOAL)
 SOURCES OF CONTAMINANT
 
MICROBIOLOGICAL CONTAMINANTS
  
Total Coliform Bacteria
5%
positive
<1%
positive
<1%
positive
0
positive
 Human and Animal Waste
Turbidity*
0.5  
NTU  
0.21 
NTU
.12-.21
NTU 
 N/A  Soil Runoff  
 
RADIONUCLIDES
  
Gross Alpha (1998)
15.0
pCi/l
4.0
pCi/l
4.0
pCi/l
15.0
pCi/l

Erosion of Natural Deposits
Radium 226 & 228
(combined) (1998)
5.0
pCi/l
2.2
pCi/l
2.2
pCi/L
 N/A

Erosion of Natural Deposits
 
INORGANIC CHEMICALS
  
Barium
2.0
mg/l
0.6
mg/l
0.6
mg/l
2.0
mg/l
 Geology, Industry
Fluoride
4.0
mg/l
1.2
mg/l
1.0-1.3
mg/l
4.0
mg/l
 Additive to Promote Strong Teeth
Nitrate (as N)
10.0
mg/l
7.7
mg/l
2.0-7.7
mg/l
10.0
mg/l
 Agriculture, Geology
Sodium N/A
48.0
mg/l
   N/A Erosion of Natural Deposits
Sulfate N/A
80.0
mg/l
   N/A Erosion of Natural Deposits
 
ORGANIC CONTAMINANTS
  
Atrazine
3.0
mg/l
1.7
mg/l
.21-1.7
mg/l
3.0
mg/l
 Runoff from Herbicide Use
TTHM
100.0
mg/l
56.0
mg/l
19.0-108
mg/l
 N/A Chlorination By-product
 SUBSTANCE
 ACTION LEVEL
 MAXIMUM 90%
DETECTION
 UTILITY
SAMPLES
 EPA MCLG
(EPA GOAL)
 SOURCES OF CONTAMINANT
 
 COPPER AND LEAD - Regulated at Customer Tap
  
Copper (1996)
1.3
mg/l
0.19
mg/l
<0.05-.30
mg/l
1.3
mg/l
 Corrosion of Home Plumbing
Lead (1996)
15.0
mg/l
11.0
mg/l
<1.0-11.0
mg/l
0
mg/l
 Corrosion of Home Plumbing

NOTE: The EPA requires monitoring for over 80 drinking water contaminants. Those listed are the only contaminants detected in your drinking water. For a complete list, contact Iowa City Water Division.

NOTE: Two homes exceeded the Action level of 15 mg/l for lead

*The Iowa City Water Division uses a treatment technique to reduce turbidity in the water. Steps include coagulation of silt and removal by sedimentation. The water is then filtered and chlorine is added for disinfection. Turbidity has no health effects. However, turbidity can interfere with disinfection and provide a medium for bacterial growth. Turbidity may indicate the presence of disease-causing organisms. These organisms include bacteria, viruses, and parasites that can cause such symptoms as nausea, cramps, diarrhea, and associated headaches.

For Additional
Information...

For more information on this Consumer Confidence Report or water quality, please call:
    Iowa City Water Division
    Carol Sweeting
    410 East Washington Street
    Iowa City, IA 52240-1826
    Phone: (319) 356-5164 •Fax: (319) 356-5167
    e-mail: carol_sweeting@iowa-city.org

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