The EPA and State of Arizona require us to monitor for certain contaminants at various locations throughout the City. Testing is done at 6 entry points to the distribution system that represent the treated source water. We also perform tests throughout the distribution system at over 90 different locations to ensure the water entering your home or business remains safe and reliable. These tables show the results of our monitoring for the period of January 1 to December 31, 2023 for PWS 04-07088 & PWS 04-07025. Some of the data, though representative, are more than one year old. The State allows monitoring for some contaminants less than once per year because the concentrations of these contaminants do not change frequently. A single value displayed in the table denotes only one test performed.
Sources of Contamination in Drinking Water
Erosion of natural deposits, runoff from orchards, runoff from glass and electronics production wastes Discharge of drilling wastes; discharge from metal refineries; erosion of natural deposits
Discharge from steel and pulp mills; erosion of natural deposits Erosion of natural deposits; water additive which promotes strong teeth; discharge from fertilizer and aluminum factories Runoff from fertilizer use; leaching from septic tanks, sewage; erosion of natural deposits Discharge from petroleum and metal refineries; erosion of natural deposits; discharge from mines
Erosion of natural deposits Erosion of natural deposits Erosion of natural deposits
Soil runoff Lowest Quarterly RAA Ratio
1.5 (lowest RAA) Analyte
Units MCL or secondary standard*
Turbidity pH* Temperature Calcium NTU SU °C ppm Magnesium ppm Sodium Naturally present in the environment
Sources of Contamination in Drinking Water Naturally present in the environment; used as an indicator that other, potentially harmful, waterborne pathogens may be present or that a potential pathway exists through which contamination may enter the drinking water distribution system.
Human and animal fecal waste By-product of drinking water disinfection By-product of drinking water disinfection
By-product of drinking water disinfection
Water additive used to control microbes Water additive used to control microbes Corrosion of household plumbing systems; erosion of natural deposits
Corrosion of household plumbing systems; erosion of natural deposits Sulfate* Hardness
Grains per Gallon
Alkalinity
Total Dissolved Solids*
Iron* ppm ppm ppm gpg ppm 5 6.5 - 8.5 NA NA NA NA 250 NA NA NA
2023 WATER QUALITY PARAMETERS MCLG Range
City of Avondale NA NA NA NA NA NA NA NA NA NA
Low- High
Avg.
Low- High
Avg.
Low- High
Avg.
Low- High
Avg.
Low- High
Avg.
Low- High
Avg.
Low- High
Avg.
Low- High
Avg.
Low- High
Avg.
Low- High
Avg. ppm 500 NA
Low- High
Avg. ppm 0.03 NA
Low- High
Avg.
Water Hardness is characterized by the following scale. Grains per gallon (GPG) 6 0 – 3 = soft 6 3.5 – 7.0 = moderately hard
0.14 - 3.95
1.01
7.18 - 7.76
7.38
18.4 - 28.0
24.3
15.0 - 130.0
78.9
7.6 - 82.0 44.1
71.0 - 150.0
111.0
23.6 - 118.0
72.2
69.0 - 660.0
378.0 NA
22.1
117.0 - 194.0
156.0
292.0 - 1120.0
707.0
Delivered water from City of Phoenix
NA NA
7.6 - 8.4 NA
14.0 - 35.0
NA
38.0 - 70.9
NA
12.8 - 29.7
NA
58.5 - 144.0
NA
28.0 - 225.0
NA
148.0 - 288.0
NA
8.6 - 16.8 NA
98.0 - 205.0
NA
368.0 - 626.0
NA
ND - 0.81 ND - 0.04 0.31
NA
6 7.0 – 10.5 = hard 6 >10.5 = very hard water
*A secondary standard is not enforceable by the EPA and is a water quality guideline.
PAGE 7 2023 AVONDALE WATER QUALITY REPORT
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