Table 1 – SAMPLING RESULTS SHOWING the detection of coliform bacteria
|
Microbiological Contaminants
|
No. of Detections
|
No. of Months in Violation
|
MCL
|
MCLG
|
Typical Source of Bacteria
|
Fecal Coliform or E. coli
(state Total Coliform Rule)
|
0
|
0
|
0
|
0
|
Human and animal fecal waste
|
Table 2 – SAMPLING RESULTS SHOWING THE detection of Lead and copper
|
Lead and Copper
|
Sample Date
|
No. of samples collected
|
90th percentile level detected
|
No. sites exceeding AL
|
AL
|
PHG
|
No. of Schools Requesting Lead Sampling
|
Typical Source of Contaminant
|
Lead (ppb)
|
9/19/2018
|
26
|
ND
|
0
|
15
|
0.2
|
1 |
Internal corrosion of household water plumbing systems; discharges from industrial
manufacturers; erosion of natural deposits
|
Copper (ppm)
|
9/19/2018
|
26
|
.096
|
0
|
1.3
|
0.3
|
Not applicable |
Internal corrosion of household plumbing systems; erosion of natural deposits; leaching
from wood preservatives
|
Table 3 – SAMPLING RESULTS FOR sodium and hardness
|
Chemical or Constituent
|
Sample Date
|
Level Detected
|
Range of Detections
|
MCL
|
PHG (MCLG)
|
Typical Source of Contaminant
|
Sodium (ppm)
|
11/14/16 11/19/18
|
24.4 |
23-26
|
none
|
none
|
Salt present in the water and is generally naturally occurring
|
Hardness (ppm)
|
11/13/17 11/19/18 12/17/18
|
109.4
|
97-110
|
none
|
none
|
Sum of polyvalent cations present in the water, generally magnesium and calcium, and are usually naturally occurring
|
Table 4 – detection of contaminants with a Primary Drinking Water Standard
|
Chemical or Constituent
|
Sample Date
|
Level Detected
|
Range of Detections
|
MCL
[MRDL]
|
PHG
(MCLG)
[MRDLG]
|
Typical Source of Contaminant
|
Nitrate (As NO3)
|
11/13/17 11/19/18 12/17/18 |
.65 mg/L
|
.53-.90 mg/L
|
10 ppm
|
n/a
|
Erosion of natural deposits; Runoff and leeching from fertilizer use; leeching from septic tanks and sewage.
|
Gross Alpha
|
10/02/17 11/13/18 11/19/18
|
6.72 pCi/L
|
3.78-10.1 pCi/L
|
15 pCi/L
|
n/a
|
Erosion of natural deposit.
|
Uranium
|
10/02/17 11/19/18
|
4.38 pCi/L
|
3.25-6.28 pci/L
|
20 pCi/L
|
n/a
|
Erosion of natural deposit.
|
Table 5 – detection of contaminants with a Secondary Drinking Water Standard
|
Chemical or Constituent
|
Sample Date
|
Level Detected
|
Range of Detections
|
MCL
|
PHG
(MCLG)
|
Typical Source of Contaminant
|
Bicarbonate Alkalinity
|
11/13/17 11/19/18 12/17/18
|
122 mg/L
|
110-130 mg/L
|
None
|
n/a
|
Naturally-occurring organic materials.
|
Calcium
|
11/13/17
11/19/18 12/17/18
|
32 mg/L
|
29-38 mg/L
|
None
|
n/a
|
Naturally-occurring organic materials.
|
Chloride
|
11/14/16
11/19/18
|
10.02 mg/L
|
8.3-12 mg/L
|
500 mg/L
|
n/a
|
Runoff/leaching from natural deposits; seawater influence.
|
Fluoride
|
11/14/16 11/13/17 11/19/18 |
.67 mg/L
|
.55-.7 mg/L
|
2 mg/L
|
.1 mg/L
|
Erosion of natural deposits; water additive that promotes healthy teeth; discharge
from fertilizer and aluminum.
|
Magnesium
|
11/13/17 11/19/18 12/17/18
|
6.9 mg/L
|
5.7-7.9 mg/L
|
None
|
n/a
|
Naturally-occurring organic materials.
|
pH. Laboratory
|
11/13/17 11/19/18 12/17/18
|
8.2 mg/L |
8.2-8.2 mg/L |
None
|
n/a
|
Naturally-occurring organic materials.
|
Specific Conductance
|
11/14/16 11/19/18
|
334 uS/cm
|
300-390 uS/cm
|
2200 uS/cm
|
1600 uS/cm
|
Substances that form ions when in water; seawater influence.
|
Sulfate
|
11/14/16 11/19/18 |
23.6 mg/L
|
19-30 mg/L
|
500
|
500 mg/L
|
Runoff/leaching from natural deposits; Industrial wastes.
|
Total Dissolved Solids
|
11/13/17 11/19/18 12/17/18
|
182 mg/L
|
140-220 mg/L
|
1000
|
n/a
|
Runoff/leaching from natural deposits.
|
Chromium (Total)
|
11/13/17 11/19/18 12/17/18
|
13.6 ug/L
|
11-15 ug/L
|
50 ug/L
|
(100) ug/L
|
Erosion of natural deposits; Discharge from steel and pulp mills and chrome plating.
|