2024 Collier County Drinking Water Quality Report

DRINKING WATER QUALITY DATA

INORGANIC CHEMICALS

Contaminant and Unit of Measurement

Dates of sampling (mo./yr.)

MCL Violation Y/N

Level Detected

Range of Results

MCLG

MCL

Likely Source of Contamination

Erosion of natural deposits; discharge from fertilizer and aluminum factories. Water additive which promotes strong teeth when at optimum level of 0.7 ppm

N

Fluoride (ppm)

3/23

0.23

NA

4

4

N N N

Nitrate (as Nitrogen) (ppm)

4/24 3/23 3/23

0.11 57.8

ND – 0.11

10

10

Runoff from fertilizer use; leaching from septic tanks, sewage; erosion of natural deposits

Sodium (ppm) Barium (ppm)

45.6 – 57.8 ND – 0.0033

N/A

160

Salt water intrusion, leaching from soil

0.0033

2

2

Discharge of drilling wastes; discharge from metal refineries; erosion of natural deposits

STAGE 1 DISINFECTANTS AND DISINFECTION BY-PRODUCTS

Dates of sampling (mo./yr.)

MCL Violation Y/N

Level Detected

Range of Results

MCLG or MRDLG MRDLG = 4

MCL or MRDL MRDL = 4

Contaminant and Unit of Measurement

Likely Source of Contamination

N

Chloramines (ppm)

Monthly 2024

3.4

1.6 - 4.1

Water additive used to control microbes

STAGE 2 DISINFECTANTS AND DISINFECTION BY-PRODUCTS

Dates of sampling (mo./yr.)

MCL Violation Y/N

Level Detected

Range of Results 17.7 - 34.6 34.1 - 75.4

MCLG or MRDLG

MCL or MRDL

Contaminant and Unit of Measurement

Likely Source of Contamination

N N

Haloacetic Acids (HAA5) (ppb)

Quarterly 2024 Quarterly 2024

29.5 60.4

NA NA

60 80

By-product of drinking water disinfection By-product of drinking water disinfection

Total trihalomethanes (TTHM) (ppb)

LEAD AND COPPER (TAP WATER)

Contaminant and Unit of Measurement

Dates of sampling (mo./yr.)

AL Exceeded Y/N

# of sampling sites exceeding the AL

90th Percentile Result

MCLG

AL (Action Level)

Likely Source of Contamination

Corrosion of household plumbing systems; erosion of natural deposits; leaching from wood preservatives

N

Copper (tap water) (ppm)

8/23 – 9/23

0.0378

0

1.3

1.3

N

Lead (tap water) (ppb)

8/23 – 9/23

1.2

0

0

15

Corrosion of household plumbing systems, erosion of natural deposits

7

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