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EF/ ICR Logo Levels of Treated Water Total Trihalomethanes for ARIZONA
OCTOBER - DECEMBER 1997


REMINDER: Data Purpose: The ICR data were collected as part of a national research project to support development of national drinking water standards. They should NOT be used to determine local water systems compliance with drinking water standards, nor should they be used to make personal judgements about individual health risks.

Units: Sample measurements are taken in micrograms per Liter (ug/L) and are regulated in milligrams per Liter (mg/L). A microgram per Liter is equivalent to one contaminant part per billion (ppb). A ppb can be thought of as one grain of salt in a swimming pool. Data for Total Trihalomethanes, haloacetic acids 5, and bromate are presented in ppb. 1 mg/L = 1000 ug/L, or 0.080 mg/L = 80 ug/L = 80 ppb, which happens to be the TTHM standard in the Stage 1 DBP Rule.

Calculation in Regulations is Different: Comparisons with compliance calculations based on the existing Total Trihalomethanes standard in CFR Part 141.30 may not be warranted since the standard i s based on an annual average of public water system quarterly averages and not on treatment plant results as shown here. Also the results here are based on different types of samples.

Results of Zero: A result of zero may indicate that a sample was analyzed, but that the result was less than the lowest value that the analytical method can reliably report.




Chandler Municipal Water Department

NO DATA - Click here to find out why.



City of Glendale

Water Type - GROUND WATER
(Treated Water)

Plant Name Plant ID Water Type Quarter Total Trihalomethanes Concentration (ppb)
Wells 736 Ground Water OCT 1997 - DEC 1997 31

Water Type - SURFACE WATER
(Treated Water)

Plant Name Plant ID Water Type Quarter Total Trihalomethanes Concentration (ppb)
Cholla Water Treatment Plant 126 Surface Water OCT 1997 - DEC 1997 61.4
Pyramid Peak Water Treatment Plant 127 Surface Water OCT 1997 - DEC 1997 100.8



City of Mesa, Utility

NO DATA - Click here to find out why.



City of Scottsdale

Water Type - GROUND WATER
(Treated Water)

Plant Name Plant ID Water Type Quarter Total Trihalomethanes Concentration (ppb)
Groundwater Treatment Facility 130 Ground Water OCT 1997 - DEC 1997 27.9
Well #53 752 Ground Water OCT 1997 - DEC 1997 9.9

Water Type - SURFACE WATER
(Treated Water)

Plant Name Plant ID Water Type Quarter Total Trihalomethanes Concentration (ppb)
CAP Water Treatment Plant 129 Surface Water OCT 1997 - DEC 1997 36.3



City of Tempe

Water Type - SURFACE WATER
(Treated Water)

Plant Name Plant ID Water Type Quarter Total Trihalomethanes Concentration (ppb)
Papago Water Treatment Plant 131 Surface Water OCT 1997 - DEC 1997 57.4
South Water Treatment Plant 132 Surface Water OCT 1997 - DEC 1997 71.3



Phoenix Municipal Water System

Water Type - SURFACE WATER
(Treated Water)

Plant Name Plant ID Water Type Quarter Total Trihalomethanes Concentration (ppb)
DEER VALLEY WTP 122 Surface Water OCT 1997 - DEC 1997 43.3
SQUAW PEAK WTP 119 Surface Water OCT 1997 - DEC 1997 42.8
UNION HILLS WTP 121 Surface Water OCT 1997 - DEC 1997 29.8
VAL VISTA WTP 120 Surface Water OCT 1997 - DEC 1997 43.2



Tucson Water

Water Type - GROUND WATER
(Treated Water)

Plant Name Plant ID Water Type Quarter Total Trihalomethanes Concentration (ppb)
Avra Valley 133 Ground Water OCT 1997 - DEC 1997 2
Tucson Basin 134 Ground Water OCT 1997 - DEC 1997 .3



Results for mixed water (ground water and surface water) and purchased water can be found under water system summary reports.


How does this state's treated water compare to treated waters nationally for Total Trihalomethanes?
View national data for the same month.


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