total coliform rule ( tcr ) monitoring in south dakota 2007 rob kittay sdwwa conference-sept 11,...
Post on 18-Dec-2015
214 Views
Preview:
TRANSCRIPT
Summary of Active PWS inSouth Dakota-2007
Total PWS 657
Community PWS 455
NTNC/NC 202
There are 6050 total compliance
periods for all systems in state.
September 11, 2008
2007 TCR Violations
Total Coliform MCL*
36
Fecal Coliform MCL*
4
Monitoring/Reporting
62*-Maximum Contaminant Level
There were a total of 36 MCL violations in 2007 during 6050 system/comp periods* for a 99.4% compliance rate.
* A “system/comp period” is a compliance period when a PWS was open and serving water to public. This could be either a month or a calendar qtr depending on the type of water system.
There were a total of 62 monitoring violations in 2007 during 6050 system/comp periods for a 99% compliance rate.
It is possible for a system to have more than one monitoring violation in a month.
September 11, 2008
2007 Monitoring Violations
No Routine Samples 31
Insufficient Routine Samples
15
No Repeat samples 9
Insufficient Repeat Samples
7
Of the 15 “insufficient routines” violations, 13 were for not enough samples in the month following an unsafe sample.
Under TCR, systems must submit at least five routine samples in month following unsafe sample.
Of the 31 “no routine sample” violations, ALL but four were for systems that had to submit only ONE sample.
September 11, 2008
2007 TCR Violationsby System Category Total CWS NTNC TNC
TC MCL 36 18 3 15
FC MCL 4 2 1 1 M/R
62
38
5
19
September 11, 2008
2007 TCR Violations
by Population Group Total < 500 500-
3300 >3300
TC MCL 36 30 5 1
FC MCL 4 4 0 0 M/R
62
53
8
1
September 11, 2008
Violations by System Type-2007
FC MCL TC MCL M/R
RWS/San Dist
0 4 0
Municipalities
0 2 21
HD/TC 2 12 16
NTNC 1 3 5
TNC 1 15 19
September 11, 2008
MCL Violations by Year
0
20
40
60
80
100
120
140
160
180
1992 1994 1996 1998 2000 2002 2004 2006 2008
FC
TC
September 11, 2008
Monitoring Violations by Year
0
100
200
300
400
500
600
1992 1995 1998 2001 2004 2007
# of M/R Violations
Note-Beginning in 2005, NC systems sample on a quarterly basis.
September 11, 2008
MCL Violations by Season
0
10
20
30
40
50
60
70
80
90
Jan-Mar Apr-Jun Jul-Sep Oct-Dec
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
September 11, 2008
MCL Violations by Month
All Systems
0
1
2
3
4
5
6
7
8
9
Jan Mar May July Sept Nov
200520062007
September 11, 2008
What is DWP Doing?
• Annual monitoring schedules• Reminders sent-Can automatically
generate emails for systems that have not sampled
• Violation notices if necessary
September 11, 2008
Conclusions• Compliance is good but can be much
better• There are still too many violations of TCR• Lower compliance rate for NC PWS vs
Community PWS• There should be no monitoring
violations-Operators should know when and how to sample.
September 11, 2008
• 85% of all TCR violations are by systems < 500 people-THIS IS NOTHING NEW!!
• Very few violations by systems > 3300 people (National small system definition)
• Lack of money• Lack of full time operators/operator
training• Lack of support from councils/boards• Lack of enforcement
September 11, 2008
Are there any answers?
• Systems need to look at water rates• Training/training material/technical assistance
is available from DENR, AWWA, SDARWS, MAP, etc.
• Small systems need to work together. Get one operator to run several systems and run them correctly!
• Capacity Development
September 11, 2008
• All CWS & NTNC required certified operators as of July 1, 2000 - Many were “grandfathered” - They need to prove themselves as “certified” operators
• Some of the “grandfathered” operators are now retiring/quitting. Their replacements must pass exams.
September 11, 2008
• Groundwater Water Rule will have systems-– test sources for contamination– install disinfection if necessary– have correct CT – correct sanitary survey deficiencies
• How will the above affect sampling?• What else can be done?
September 11, 2008
EPA May Revise TCR• Does a TC + sample have public health
significance or should it be an “action level”?
• Repeat sampling after MCL violated• Repeat sampling for systems w/ single tap• Sampling in month following unsafe sample• Locations of repeat samples
September 11, 2008
If you want to know your violation record, you can-
• Go to EnviroFaxhttp://www.epa.gov/enviro/html/sdwis/sdwis_query.html
• Call DWP
top related