|
Regulated Contaminants with a Primary MCL |
|
Constituent (units) |
MCL |
PHG
(MCLG) |
Range of Detection |
Average Level |
MCL
Violation? |
Most Recent Sampling Date |
Typical Source of Constituent |
|
Radioactive Constituents |
|
Gross Alpha particle activity (pCi/L) |
15 |
NS |
0 -2.4 |
0.8 |
No |
2004 |
Erosion of natural deposits |
|
Inorganic Constituents |
|
Barium (ppm) |
1 |
(2) |
.03 - .14 |
0.09 |
No |
2007 |
Discharges of oil drilling wastes and from metal
refineries; erosion of natural deposits |
|
Hexavalent Chromium (ppb) |
50 |
(100) |
2.8 - 13 |
7.0 |
No |
2007 |
Discharge from steel and pulp mills and chrome plating;
erosion of natural deposits |
|
Fluoride (ppm) |
2 |
1 |
0.16 - 0.22 |
0.18 |
No |
2007 |
Erosion of natural deposits |
|
Nitrate as nitrate (ppm) |
45 |
45 |
0.4 - 19.0 |
7.81 |
No |
2007 |
Runoff and leaching from fertilizer use; leaching from
septic tanks and sewage; erosion of natural deposits |
|
Regulated Contaminants with a Secondary MCL |
|
Color (PCU) |
15 |
NS |
1 - 2 |
1.6 |
No |
2005 |
Naturally-occurring organic materials |
|
Corrosivity |
Non-corrosive |
NS |
|
Corrosive |
Yes |
2002 |
Natural or industrially-influenced balance of hydrogen,
carbon, and oxygen in the water; affected by temperature
and other factors |
|
Iron (ppb) |
300 |
NS |
<5 - 210 |
44.2 |
No |
2007 |
Leaching from natural deposits |
|
Threshold Odor (TON) |
3 |
NS |
0 - 1.7 |
0.54 |
No |
2005 |
Naturally-occurring organic materials |
|
Turbidity (NTU) |
5 |
NS |
0.06 - 0.66 |
0.228 |
No |
2005 |
Soil runoff |
|
Total Dissolved Solids (ppm) |
1000 |
NS |
140 - 840 |
511 |
No |
2005 |
Runoff/leaching from natural deposits; seawater
influence |
|
Specific Conductance (µmhos/cm) |
1600 |
NS |
230 - 860 |
518 |
No |
2005 |
Substances that form ions when in water; seawater
influence |
|
Chloride (ppm) |
500 |
NS |
29 - 130 |
61.4 |
No |
2005 |
Runoff/leaching from natural deposits; seawater
influence |
|
Sulfate (ppm) |
500 |
NS |
4.3 - 40 |
19.2 |
No |
2005 |
Runoff/leaching from natural deposits; seawater
influence |
|
Unregulated Constituents |
|
Hardness of CaCO3 (ppm) |
NS |
NS |
69 - 420 |
227.1 |
NS |
2006 |
Leaching from natural deposits |
|
Sodium (ppm) |
NS |
NS |
22 - 53 |
34.2 |
NS |
2005 |
Leaching from natural deposits |
|
Calcium (ppm) |
NS |
NS |
11 - 57 |
31.8 |
NS |
2005 |
Runoff/leaching from natural deposits; seawater
influence |
|
Magnesium (ppm) |
NS |
NS |
8 - 53 |
28.7 |
NS |
2005 |
Runoff/leaching from natural deposits; seawater
influence |
|
pH (Unit) |
NS |
NS |
6.48 - 7.87 |
7.18 |
NS |
2006 |
Runoff/leaching from natural deposits; seawater
influence |
|
DISTRIBUTION SYSTEM WATER QUALITY |
|
Constituent (units) |
Primary
MCL |
PHG (MCLG) |
Range of Detection |
Average Level |
MCL Violation? |
Most Recent Sampling Date |
Typical Source of Constituent |
|
Bacteriological Constituents |
|
Total Coliform
Bacteria
monthly positive samples) |
More than 5.0
(% of monthly samples are positive |
(0) |
Present or Absent |
Absent |
No |
2007 |
Naturally present in the environment |
|
Volatile Organic Compounds |
|
Total Trihalomethanes (ppb) |
100 |
NS |
ND |
ND |
No |
2007 |
By-product of drinking water chlorination |
|
Lead and Copper Rule |
|
Lead (ppb) |
AL = 15 |
2 |
< 5 - < 5 |
<5 |
No |
2007 |
Internal corrosion of household water plumbing systems;
erosion of natural deposits |
|
Copper (ppb) |
AL = 1300 |
627 |
< 5 - 1000 |
533 |
No |
2007 |
Internal corrosion of household water plumbing systems;
erosion of natural deposits |
|
Reactive Phosphate as PO4 (ppm) |
NS |
NS |
0.30 - 1.16 |
0.69 |
No |
2007 |
Internal corrosion of household water plumbing systems;
erosion of natural deposits |