Inorganic Contaminants
CONTAMINANT & UNIT OF MEASUREMENT
DATES OF SAMPLING (MO/YR)
MCL VIOLATION (Y/N)
Level Detected
Likely Source of Contamination
Range of Results
MCLG MCL
Runoff from fertilizer use; leaching from septic tanks, sewage; erosion of natural deposits
Nitrate (ppm)
12/24
N
0.04
N/A
10
10
Discharge of drilling wastes; discharge from metal refineries; erosion of natural deposits
Barium (ppm)
07/23
N
0.0031
N/A
2
2
Salt water intrusion, leaching from soil
Sodium (ppm)
07/23
N
25
N/A
N/A
160
Stage 1 Disinfectants and Disinfection By-Products
MCLG or MRDLG
CONTAMINANT & UNIT OF MEASUREMENT
DATES OF SAMPLING (MO/YR)
MCL VIOLATION (Y/N)
Level Detected
MCL or MRDL
Likely Source of Contamination
Range of Results
By-product of drinking water disinfection
MCLG = 0
Bromate* (ppb)
1/24 - 12/24
N
0.18
ND - 2.1
MCL = 10
Chlorine and Chloramines** (ppm)
MRDLG = 4
MRDL = 4.0
Water additive used to control microbes
1/24 - 12/24
Y
4.1***
0.6 - 5.4
**During the second quarter of 2024, the City of Daytona Beach had an MRDL Violation which occurred when the disinfectant Running Annual Average residual of Chlorine/Chloramines was found to be greater than the MRDL. The Running Annual Average during that period was 4.1 ppm, 0.1 ppm over the MRDL of 4 ppm. The overall disinfectant residual was reduced within the distribution system and fell below the MRDL by the next quarter, where it has remained. The potential adverse health affects for drinking or using water which contains chlorine or chloramines well in excess of the MRDL are listed below. **Chloramines: Some people who use water containing chloramines well in excess of the MRDL could experience irritating effects to their eyes and nose. Some people who drink water containing chloramines well in excess of the MRDL could experience stomach discomfort or anemia. **Chlorine: Some people who use water containing chlorine well in excess of the MRDL could experience irritating effects to their eyes and nose. Some people who drink water containing chlorine well in excess of the MRDL could experience stomach discomfort. 8 2025 Water Quality Report
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