U.S. EPA National Drinking Water Contaminant Occurrence Database
August 1999
| Drinking Water Data | ||||||||||||
National |
||||||||||||
Surface Water |
||||||||||||
| Contaminant/ PWS Size | Total Analyses |
# Analyses w/Detects |
# PWS w/Analyses |
# PWS w/Detects |
Units (UOM) |
Min |
Max |
Median |
Average |
Std. Dev. |
||
| SODIUM | ||||||||||||
| Small | 501-3,300 | 1 |
0 |
1 |
0 |
|||||||
| Medium | 3,301-10,000 | 2 |
2 |
2 |
2 |
UG/L |
3 |
9500 |
9500 |
4751.5 |
6715.3931 |
|
| Large | 10,001-100,000 | 56 |
55 |
17 |
17 |
UG/L |
3 |
47900 |
47900 |
8723.7909 |
14622.3431 |
|
| All Systems | 59 |
57 |
20 |
19 |
UG/L |
3 |
47900 |
47900 |
8584.4123 |
14405.7559 |
||
|
||||||||||||
Drinking Water Data |
||||||||||||
National |
||||||||||||
Ground Water |
||||||||||||
| Contaminant/ PWS Size | Total Analyses |
# Analyses w/Detects |
# PWS w/Analyses |
# PWS w/Detects |
Units (UOM) |
Min |
Max |
Median |
Average |
Std. Dev. |
||
| SODIUM | ||||||||||||
| Very Small | 0-500 | 16 |
16 |
15 |
15 |
UG/L |
3 |
37800 |
37800 |
6606.0625 |
11045.6386 |
|
| Small | 501-3,300 | 13 |
13 |
11 |
11 |
UG/L |
2 |
104000 |
104000 |
15993.6154 |
28238.5752 |
|
| Medium | 3,301-10,000 | 19 |
19 |
6 |
6 |
UG/L |
3 |
115000 |
115000 |
20191.5263 |
35275.8205 |
|
| Large | 10,001-100,000 | 7 |
7 |
4 |
4 |
UG/L |
3 |
170000 |
170000 |
24290.7143 |
64251.7559 |
|
| All Systems | 55 |
55 |
36 |
36 |
UG/L |
2 |
170000 |
170000 |
15768.8727 |
33552.5264 |
||
