2023 WQCCR - FINAL

Abbreviations: mS/cm = microsiemens N/A = not applicable ND = not detectable at testing limit

NTU = Nephelometric Turbidity Units TON = Threshold Odor Number TDS = Total Dissolved Solids UCMR = Unregulated Contaminant Monitoring Rules Umho/cm = micromhos per centimeter

TT = Treatment Techniques AL = Action Level NL = Notification Level pCi/L = picocuries per liter (a measure of radiation)

ppb = parts per billion or micrograms per liter ppm = parts per million or milligrams per liter ppt = parts per trillion

Chino Hills Water System

State MCL [DLR]

Range and Average

Parameters [units]

PHG [MCLG]

Chino Hills Wells

Chino 1 Desalter

Monte Vista Water

ADDITIONAL CONTAMINANTS, Sampled 2022-2023

Range

N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A

58 - 130

N/A N/A N/A N/A

Alkalinity [ppm]

N/A

N/A

Average

89

Range

58 - 130

Bicarbonate [ppm]

N/A

N/A

Average

89

Range

28 - 54

36 - 72

Hardness [ppm] Calcium [ppm]

N/A

N/A

Average

44

25

Range

93 - 190

100 - 250

N/A

N/A

Average

150 N/A N/A

94

Range

ND - 6.4

Iron [ppb]

N/A

N/A

Average

ND

Range

5.3 - 12

3 - 18

Magnesium [ppm]

N/A

N/A

Average

9.4

7.7

Range

7 - 8

7.6 - 8

pH [units]

N/A

N/A

Average

7.6

7.8

Range

ND - 1.2

ND - 2.8

Potassium [ppm]

N/A

N/A

Average

1

2

Range

24 - 32

15 - 35

Sodium [ppm]

N/A

N/A

Average

28

34

Range

N/A 7.5 N/A N/A N/A N/A

N/A N/A

Total Silica [ppm]

N/A

N/A

Average

Range

ND - .42

Total Organic Carbon (TOC) [ppm]

TT

0.02

Average

2

Range

ND - 14

Vanadium [ppb]

NL=50

N/A

Average

4