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Home > Programs > Bureau of Environmental Protection > Office of Water Resources > Water/Wastewater Permits > ISDS > Groundwater Factors


USGS
Water Table
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Groundwater Table Adjustment Factors Factors are updated as needed during the wet season. They are an approximation of the groundwater table status for the soil types listed. For further information, contact Brian Sullivan at 401-222-4700 x7720. *Note-some monitoring wells dry/factor may be greater than number indicates.

**A negative number indicates a flooded condition**
Date Glacial outwash
(inches)		 Glacial till (inches)
West Bay East Bay
4/15/08
13
33
38
4/9/08
9
27
28
3/26/08
7
19
13
3/13/08
(3" rain event on 3/8/08)
5
13
-9
2/27/08
16
32
22
2/12/08
30
48
35
1/29/08
35
71
50
1/16/08
36
76
50
1/2/08
39
89
55
4/25/07
-3
1
5
4/13/07
6
18
24
3/30/07
6
24
20
3/16/07
13
50
55
2/28/07
26
58
66
1/30/07
14
37
45
1/16/07
8
29
23
12/15/06
15
51
52
4/17/06
19
66
70
3/29/06
16
59
66
3/15/06
12
48
62
2/27/06
9
30
50
2/1/06
7
13
17
1/12/06
8
33
23
4/27/05
7
20
48
4/5/05
-8
-8
-11
3/21/05
12
38
21
2/25/05
9
23
21
1/28/05
12
33
36
12/30/04
14
40
40
11/29/04
22
-----
-----
10/29/04
26
-----
-----
10/1/04
26
-----
-----
8/24/04
46
-----
-----
8/4/04
60
-----
-----
7/4/04
57
-----
-----
6/4/04
52
-----
-----
5/26/04
12
-----
-----
4/28/04
4
9
4
4/21/04
0
2
4
4/8/04
6
20
4
3/30/04
22
57
57
2/26/04
30
64
62
2/13/04
21
53
62
1/28/04
22
47
63
1/14/04
16
40
48
12/30/03
10
27
32
11/26/03
-5
-----
-----
10/30/03
12
-----
-----
9/29/03
31
-----
-----
8/28/03
24
-----
-----
7/29/03
16
-----
-----
6/26/03
9
-----
-----
5/14/03
12
30
43
4/25/03
0
5
0
4/9/03
6
6
12
3/26/03
7.5
15
25
3/13/03
17
33
21
2/25/03
18
51
28
2/13/03
28
55
65
1/28/03
18
44
53
1/8/03
11
25
-4
5/22/02
18
34
10
5/3/02*
26
49.4
42
4/24/02*
28
65
40
4/10/02*
25
61
18
3/28/02*
29
68
41
3/15/02*
37
81
60
2/28/02*
41
91
62
1/25/02*
42
97
56
4/25/01
6
15
25
4/12/01
-2
-4
-2
4/4/01
-11
-14
-18
3/27/01
-1
-10
-9
3/20/01
(pre-rain event)
12
22
2
2/28/01
21
46
31
2/20/01
22
50
30
2/07/01
24
59
23
1/24/01
26.5
67.5
31
12/28/00
25
67
25
5/26/00
13
36
49
5/9/00
10
23
34
4/26/00
1
5
0
4/13/00
14
28
37
3/31/00
9
20
8
3/21/00
8
21
0
3/14/00
10
31
0
2/24/00
19
56
47
2/8/00
26
65
53
1/21/00
21.5
54
47.5
12/22/99
25
63
40
For General Information 222-6800 • After Hours Emergencies 222-3070 • Disclaimer
rev. 4/22/08