Department of Water Supply
"By Water All Things Find Life"
2006 Water Quality Monitoring Results for the Wailuku System

This water has been tested and meets all Federal and State Standards. The following data is about your drinking water.

This water serves: Kahului, Kihei, Makena, Paia, Wailea, Wailuku, Maalaea

Source Name Origin Treatment
Iao Tunnel UV/Chlorination
Iao Ditch Surface Microfiltration, Chlorination
Kepaniwai Groundwater Chlorination
Mokuhau Groundwater Chlorination
Kanoa Groundwater Chlorination
North Waihee Groundwater Chlorination
Waiehu Heights Groundwater Chlorination
Waihee Groundwater Chlorination

If a contaminant is NOT SHOWN, IT WAS NOT DETECTED

Detected Primary Contaminants Unit Highest Average Range EPA's Allowable Limits MCL EPA's Allowable Limits MCLG Typical Source of Contaminant Is Your Water Safe? Compliance
Detected at the sources
Barium ppm 0.012 ND-0.012 2 2 Erosion of natural deposits YES
Chromium ppb 3.4 ND-3.4 100 100 Erosion of natural deposits YES
Nitrates ppm 1.1 <0.30-1.1 10 10 Erosion of natural deposits YES
Detected in the distribution system
TTHM's
(Total trihalomethanes)
ppb 6.3 ND-17 80 N/A Disinfection by-product YES
HAA's
(Haloacetic Acids)
ppb 1.9 ND-8.8 60 N/A Disinfection by-product YES

Contaminant Sample Date Unit 90th Percentile Reading Action Level # Samples Above Action Level Is Your Water Safe? Compliance met?
Lead 2003 ppb <5 15 0 YES
Copper 2003 ppm 0.11 1.3 0 YES

Infants and young children are typcially more vulnerable to lead in drinking water than the general population. It is possible that lead levels at your home may be higher than at homes in the community as a result of materials used in your home's plumbing. If you are concerned about elevated lead levels in your home's water, you may wish to have your water tested. As a general practice, you should flush your tap for 30 seconds to 2 minutes before using the tap water, if you have not used it for 4-6 hours. Additional information is available from the Safe Drinking Water Hotline at 1-800-426-4791.

Microbiological Contaminants Detected in the distribution system Unit Result MCL MCLG Typical Source of Contaminant Is Your Water Safe? Compliance
Total Coliform Bacteria CFU/100 ml 0.17% Highest monthly percentage of positive samples > or = 5% of monthly samples 0 Naturally present in the environment YES

Definitions
MCL Maximum Contaminant Level The highest level of a contaminant that is allowed in drinking water
MCL's are set as close to the MCLG's as feasible using the best available technology
MCLG Maximum Contaminant Level Goal The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLG's allow for a margin of safety.
MF/L   Million Fibers per liter
Action Level   The concentration of a contaminant which, if exceeded, triggers treatment or other requirements which a water system must follow.
CFU/100 ml   Colony Forming Units per 100 milliliter
Mrem/yr Millirems per year A measure of radiation
pCi/L Picocuries per liter A measure of radioactivity

Abbreviations   Compared to
ppm Parts per million milligrams per liter One second every 12 days
ppb Parts per billion micrograms per liter One second every 32 years
ppt Parts per trillion nanograms per liter One second every 32,000 years
ND Not Detected    
NQ Not Quantifiable    
< Less than    
NYA Not Yet Available