 |
|
This data was collected using EPA Method 1623. Data tables represent routine monitoring only. Special monitoring projects are not included here.
BEGINNING 2004,THE DATA UNITS CHANGED FROM PER 100 LITERS TO PER ONE LITER |
|
San Antonio Reservoir (SVWTP Raw)
2007 |
|
Sample
Date
|
Total
Cryptosporidium
(Oocysts/1L) |
Total
Giardia
(Cysts/1L) |
|
03/14/2007 |
0.01 |
<0.02 |
|
03/27/2007 |
<0.01 |
0.01 |
|
04/12/2007 |
<0.01 |
0.01 |
|
05/10/2007 |
<0.01 |
0.03 |
|
06/13/2007 |
<0.01 |
<0.01 |
|
08/16/2007 |
<0.01 |
<0.01 |
|
09/13/2007 |
<0.01 |
<0.01 |
|
10/11/2007 |
<0.01 |
<0.01 | No parasite samples were collected in November and December 2007 due to treatment plant shutdown.
|
This data was collected using EPA Method 1623. Data tables represent routine monitoring only. Special monitoring projects are not included here.
BEGINNING 2004,THE DATA UNITS CHANGED FROM PER 100 LITERS TO PER ONE LITER |
|
San Antonio Reservoir (SVWTP Raw)
2006 |
|
Sample
Date
|
Total
Cryptosporidium
(Oocysts/1L) |
Total
Giardia
(Cysts/1L) |
|
01/09/2006 |
<0.01 |
<0.01 |
|
04/272006 |
0.03 |
<0.01 |
|
05/11/2006 |
<0.01 |
<0.01 |
|
05/24/2006 |
<0.01 |
<0.01 |
|
06/14/2006 |
<0.01 |
0.01 |
|
06/29/2006 |
<0.01 |
<0.01 |
|
07/12/2006 |
<0.01 |
<0.01 |
|
07/27/2006 |
<0.01 |
<0.01 |
|
08/10/2006 |
<0.01 |
<0.01 |
|
08/23/2006 |
<0.009 |
<0.009 |
|
09/13/2006 |
<0.01 |
<0.01 |
|
09/27/2006 |
<0.01 |
<0.01 |
|
10/12/2006 |
<0.01 |
<0.01 |
|
10/25/2006 |
<0.007 |
<0.007 |
|
11/08/2006 |
<0.01 |
<0.01 |
|
11/20/2006 |
0.01 |
<0.01 |
|
This data was collected using EPA Method 1623. Data tables represent routine monitoring only. Special monitoring projects are not included here.
BEGINNING 2004,THE DATA UNITS CHANGED FROM PER 100 LITERS TO PER ONE LITER |
|
San Antonio Reservoir
2005 |
|
Sample
Date
|
Total
Cryptosporidium
(Oocysts/1L) |
Total
Giardia
(Cysts/1L) |
|
01/19/2005 |
<0.01 |
0.01 |
|
02/10/2005 |
<0.01 |
0.02 |
|
03/02/2005 |
<0.02 |
<0.02 |
|
03/21/2005 |
0.05 |
<0.01 |
|
04/21/2005 |
<0.01 |
<0.01 |
|
12/13/2005 |
0.02 |
<0.01 |
|
|
|
San Antonio Reservoir
2004 |
|
Sample
Date
|
Total
Cryptosporidium
(Oocysts/1L) |
Total
Giardia
(Cysts/1L) |
|
02/09/2004 |
<0.01 |
<0.01 |
|
12/14/2004 |
<0.01 |
<0.01 |
| This data was collected using EPA Method 1623. Data tables represent routine monitoring only. Special monitoring projects are not included here. |
|
San Antonio Reservoir
2003 |
|
Sample
Date
|
Total
Cryptosporidium
(Oocysts/100L) |
Total
Giardia
(Cysts/100L) |
|
01/28/2003 |
<0.9 |
0.9 |
|
02/20/2003 |
<1 |
<1 |
|
02/27/2003 |
<1 |
<1 |
|
03/27/2003 |
<1 |
<1 |
|
04/10/2003 |
<1 |
<1 |
|
06/18/2003 |
0.9 |
<0.9 |
|
07/02/2003 |
<1 |
<1 |
|
07/22/2003 |
<0.8 |
<0.8 |
|
08/25/2003 |
<1 |
<1 |
|
09/17/2003 |
<0.8 |
0.8 |
|
10/27/2003 |
0.8 |
<0.8 |
| This data was collected using EPA Method 1623. Data tables represent routine monitoring only. Special monitoring projects are not included here. |
|
San AntonioReservoir
2002 |
|
Sample
Date
|
Total
Cryptosporidium
(Oocysts/100L) |
Total
Giardia
(Cysts/100L) |
|
01/29/2002 |
< 0.7 |
< 0.7 |
|
02/20/2002 |
< 1 |
< 1 |
|
04/01/2002 |
< 0.8 |
< 0.8 |
|
05/14/2002 |
< 1 |
< 1 |
|
05/30/2002 |
< 0.8 |
< 0.8 |
|
06/1/2002 |
< 0.9 |
< 0.9 |
|
06/24/2002 |
< 1 |
< 1 |
|
07/10/2002 |
< 1 |
< 1 |
|
08/01/2002 |
< 1 |
< 1 |
|
09/10/2002 |
<1 |
<1 |
|
10/08/2002 |
<0.8 |
<0.8 |
|
10/22/2002 |
<1 |
<1 |
|
11/27/2002 |
<0.9 |
<0.9 | |
|
San AntonioReservoir
2001 |
|
Sample
Date
|
Total
Cryptosporidium
(Oocysts/10L) |
Total
Giardia
(Cysts/10L) |
|
01/08/2001 |
< 1 |
< 1 |
|
02/12/2001 |
1 |
< 1 |
|
03/12/2001 |
1 |
< 1 |
|
04/17/2001 |
< 1 |
< 1 |
|
05/02/2001 |
< 1 |
< 1 |
|
05/17/2001 |
1 |
< 1 |
|
06/06/2001 |
< 1 |
< 1 |
|
06/21/2001 |
< 1 |
< 1 |
|
07/11/2001 |
< 1 |
< 1 |
|
07/26/2001 |
< 1 |
< 1 |
|
08/10/2001 |
< 1 |
< 1 |
|
08/29/2001 |
< 1 |
< 1 |
|
10/05/2001 |
< 1 |
< 1 |
|
10/17/2001 |
< 1 |
< 1 |
|
10/18/2001 |
< 1 |
< 1 |
|
11/02/2001 |
< 1 |
< 1 |
|
11/16/2001 |
< 1 |
< 1 |
|
See note #6 for method change. |
|
Sample
Date
|
Total
Cryptosporidium
(Oocysts/100L) |
Total
Giardia
(Cysts/100L) |
|
11/30/2001 |
< 1 |
< 1 |
|
12/26/2001 |
< 1 |
< 1 |
Note:
1) "< xx" = Less than where "xx" is the detection limit.
2) NA = Not Available.
3) Detection Limit (DL) - The DL changes with each sample's water quality and volume. Lower DL's can be obtained with higher sample volumes and/or better water quality.
4) Total = The Total count is a sum of all the subcategories (“Empty”, “Amorphous”, or “With (internal) Structure(s)”). For Giardia, up to three distinct structures are seen – axonemes, median bodies, and nuclei. For Cryptosporidium, up to four sporozoites are seen. Given that the method is subject to false positives and false negatives, the “Total” column represents the most inclusive data on the conservative end. All data in each category represents a collective interpretation of the three microscopic techniques used (FA, DAPI, and DIC).
5) On September 20, 2000, our testing method switched from the Information Collection Rule (ICR) method to EPA Method 1623.
6) On November 18, 2001, our testing volume changed from 10L using the Envirochek capsule to 100L using the Envirocheck High Volume (HV) capsule. | | | | | |
|
|
