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Lead and Copper Sample Summary Results 
Water System No. : |
CA4900707 |
Federal Type : |
NTNC |
Water System Name : |
TWIN HILLS SCHOOL DIST-TWIN HILLS SCHOOL |
State Type : |
NTNC |
Principal County Served : |
SONOMA |
Primary Source : |
GW |
Status : |
A |
Activity Date : |
03-22-1979 |
Distribution System Classification : |
D1 |
Max Treatment Plant Classification : |
TD |
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Click to hide / show columns:
MP | MP Begin |
MP End | Type |
# Samples | Measure |
Units | Analyte Code/Name |
Begin Sampling| End Sampling
MP * |
MP Begin |
MP End |
Type |
# Samples |
Measure |
Units |
Analyte Code/Name |
Begin Sampling |
End Sampling |
MP * |
MP Begin |
MP End |
Type |
# Samples |
Measure |
Units |
Analyte Code/Name |
Begin Sampling |
End Sampling |
3Y2022-2024 |
01-01-2022 |
12-31-2024 |
90 |
5 |
0.0044 |
MG/L |
PB90 - LEAD SUMMARY |
09-19-2024 |
09-19-2024 |
3Y2022-2024 |
01-01-2022 |
12-31-2024 |
90 |
5 |
0.250 |
MG/L |
CU90 - COPPER SUMMARY |
09-19-2024 |
09-19-2024 |
3Y2019-2021 |
01-01-2019 |
12-31-2021 |
90 |
5 |
0.0027 |
MG/L |
PB90 - LEAD SUMMARY |
09-29-2021 |
09-29-2021 |
3Y2019-2021 |
01-01-2019 |
12-31-2021 |
90 |
5 |
0.275 |
MG/L |
CU90 - COPPER SUMMARY |
09-29-2021 |
09-29-2021 |
3Y2016-2018 |
01-01-2016 |
12-31-2018 |
90 |
5 |
.0036 |
MG/L |
PB90 - LEAD SUMMARY |
09-20-2018 |
09-20-2018 |
3Y2016-2018 |
01-01-2016 |
12-31-2018 |
90 |
5 |
.217 |
MG/L |
CU90 - COPPER SUMMARY |
09-20-2018 |
09-20-2018 |
3Y2013-2015 |
01-01-2013 |
12-31-2015 |
90 |
5 |
0.015 |
MG/L |
PB90 - LEAD SUMMARY |
09-15-2015 |
09-15-2015 |
3Y2013-2015 |
01-01-2013 |
12-31-2015 |
AL |
1 exceeding Action Level |
--- |
--- |
PB90 - LEAD SUMMARY |
09-15-2015 |
09-15-2015 |
3Y2013-2015 |
01-01-2013 |
12-31-2015 |
90 |
5 |
0.335 |
MG/L |
CU90 - COPPER SUMMARY |
09-15-2015 |
09-15-2015 |
3Y2010-2012 |
01-01-2010 |
12-31-2012 |
90 |
5 |
0 |
MG/L |
PB90 - LEAD SUMMARY |
07-24-2012 |
07-24-2012 |
3Y2010-2012 |
01-01-2010 |
12-31-2012 |
90 |
5 |
0.21 |
MG/L |
CU90 - COPPER SUMMARY |
07-24-2012 |
07-24-2012 |
YR2009 |
01-01-2009 |
12-31-2009 |
90 |
5 |
0.2 |
MG/L |
CU90 - COPPER SUMMARY |
08-21-2009 |
08-21-2009 |
YR2009 |
01-01-2009 |
12-31-2009 |
90 |
5 |
0 |
MG/L |
PB90 - LEAD SUMMARY |
08-21-2009 |
08-21-2009 |
3Y2007-2009 |
01-01-2007 |
12-31-2009 |
90 |
5 |
0.2 |
MG/L |
CU90 - COPPER SUMMARY |
08-21-2009 |
08-21-2009 |
3Y2007-2009 |
01-01-2007 |
12-31-2009 |
90 |
5 |
0 |
MG/L |
PB90 - LEAD SUMMARY |
08-21-2009 |
08-21-2009 |
YR2006 |
01-01-2006 |
12-31-2006 |
90 |
5 |
0.01 |
MG/L |
PB90 - LEAD SUMMARY |
09-12-2006 |
09-12-2006 |
YR2006 |
01-01-2006 |
12-31-2006 |
90 |
5 |
0.317 |
MG/L |
CU90 - COPPER SUMMARY |
09-12-2006 |
09-12-2006 |
3Y2004-2006 |
01-01-2004 |
12-31-2006 |
90 |
5 |
0.01 |
MG/L |
PB90 - LEAD SUMMARY |
09-12-2006 |
09-12-2006 |
3Y2004-2006 |
01-01-2004 |
12-31-2006 |
90 |
5 |
0.317 |
MG/L |
CU90 - COPPER SUMMARY |
09-12-2006 |
09-12-2006 |
YR2001 |
01-01-2001 |
12-31-2001 |
90 |
5 |
0 |
MG/L |
PB90 - LEAD SUMMARY |
09-28-2001 |
09-28-2001 |
YR2001 |
01-01-2001 |
12-31-2001 |
90 |
5 |
0 |
MG/L |
CU90 - COPPER SUMMARY |
09-28-2001 |
09-28-2001 |
YR2000 |
01-01-2000 |
12-31-2000 |
90 |
5 |
0 |
MG/L |
PB90 - LEAD SUMMARY |
06-02-2000 |
06-02-2000 |
YR2000 |
01-01-2000 |
12-31-2000 |
90 |
5 |
0 |
MG/L |
CU90 - COPPER SUMMARY |
06-02-2000 |
06-02-2000 |
6M2ND-1999 |
07-01-1999 |
12-31-1999 |
90 |
10 |
0.183 |
MG/L |
CU90 - COPPER SUMMARY |
09-21-1999 |
09-21-1999 |
6M2ND-1999 |
07-01-1999 |
12-31-1999 |
90 |
10 |
0 |
MG/L |
PB90 - LEAD SUMMARY |
09-21-1999 |
09-21-1999 |
6M1ST-1994 |
01-01-1994 |
06-30-1994 |
90 |
9 |
0 |
MG/L |
PB90 - LEAD SUMMARY |
08-04-1994 |
08-04-1994 |
6M1ST-1994 |
01-01-1994 |
06-30-1994 |
90 |
9 |
0.6271 |
MG/L |
CU90 - COPPER SUMMARY |
08-04-1994 |
08-04-1994 |
* MP is monitoring period which can be triennial (3Y), annual (YR), 1st
six months (6M1ST), or 2nd six months (6M2ND)
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