PAGE 16
ANALYTE NAME
UNITS OF
MEASURE
MCL/
sMCL
NL/
RL
PHG
DLR
ATTRIBUTE
ELSINORE
GROUNDWATER
BLEND
TEMESCAL
VALLEY
PIPELINE BLEND
AULD VALLEY
PIPELINE BLEND
TEMESCAL
GROUNDWATER
BLEND
MCL
VIOLATION
MAJOR SOURCES IN DRINKING WATER
CLARITY
MWD-MILLS TP
MWD-SKINNER TP
TURBIDITY (Treatment Plant Combined Filter Effluent)
NTU
0.1
Highest
% Less Than 0.3
N/A
0.07
0.07
N/A
No
Soil Runoff
N/A
100%
100%
N/A
TURBIDITY (Entry Points to Distribution System)
NTU
0.1
0.1
Range
0.19-1.9
0.18-0.87
ND-2.5
0.18-0.61
No
Soil Runoff
Average
0.47
0.39
0.12
0.37
INORGANIC CHEMICALS
ALUMINUM
ppb
1000,
200(s)
600
50
Range
ND
ND-90
ND-180
ND-56
No
Residue from water treatment process; runoff
and leaching from natural deposits
Average
ND
ND
97
ND
ARSENIC
ppb
10
0.004
Range
2.5-7.4
ND-4.0
ND-9.1
ND-2.2
No
Natural deposits erosion, glass and electronics production wastes
Average
4.4
ND
ND
ND
BARIUM
ppb
1000
2000
100
Range
ND-150
ND
ND-143
ND
No
Oil and metal refineries discharge; natural deposits erosion
Average
ND
ND
ND
ND
FLUORIDE
ppm
0.1
Range
0.13-1.2
0.29-0.8
ND-0.8
0.29-0.31
No
Internal corrosion of household plumbing systems; erosion
of natural deposits; leaching from wood preservatives
Average
0.49
0.56
0.55
0.3
NICKEL
ppb
100
12
10
Range
ND
ND-29
ND
ND
No
Erosion of natural deposits; discharge from metal factories
Average
ND
ND
ND
ND
NITRATE (as Nitrogen)
ppm
10
10
0.4
Range
ND-6.4
ND-6.9
ND-3.6
0.96-2.0
No
Runoff and leaching from fertilizer use; septic
tank and sewage; natural deposits erosion
Average
1.23
1.28
ND
1.32
PERCHLORATE
ppb
Range
ND
ND-2.5
ND
ND
No
Industrial waste discharge
Average
ND
ND
ND
ND
SELENIUM
ppb
50
30
Range
ND-17.0
ND
ND-9.3
ND
No
Refineries, mines, and chemical waste
discharge; runoff from livestock lots
Average
6.89
ND
ND
ND
RADIOLOGICALS
GROSS ALPHA PARTICLE ACTIVITY
PCI/L
15
Range
ND-6.9
11.6-15.5
ND-10.6
11.6-15.5
No
Erosion of natural deposits
Average
ND
ND
ND
13
GROSS BETA PARTICLE ACTIVITY
PCI/L
50
Range
ND
6.1
ND-20.0
6.1
No
Decay of natural and man-made deposits
Average
ND
ND
ND
6.1
RADIUM-228
PCI/L
0.019
Range
ND-1.8
ND-1.0
ND
ND
No
Erosion of natural deposits
Average
ND
ND
ND
ND
COMBINED URANIUM
PCI/L
20
0.43
Range
ND-5.5
8.0-15.0
ND-6.6
8.0-15.0
No
Erosion of natural deposits
Average
1.4
2.5
1.7
12.0
LEGEND:
* = Secondary Aesthetic Standard for Aluminium is 200 ppb
** = Includes Federal UCMR-5 monitoring results
PAGE 17
Annual Water Quality Report 2023