Arizona Department of Environmental Quality Safe Drinking Water Monitoring Assistance Program
County Map of Arizona Water System Search Help
Water System Detail Information

Water System ID #:

AZ0414014

Water System Classification:

C

Water System Name:

SHEPARD WATER COMPANY

Primary Water Source:

GW

Principal County Served:

YUMA

System Activity / MAP Participant:

A - MAP

Activity Date:

01-01-1957



Group Violations
Fed Fiscal Year Comp Prd Begin Date Comp Prd End Date Sample Point Viol Type Violation Name Comp Achieved Analyte Group Analyte Group Name
2020 01-01-2019 12-31-2019 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR N DBP2 STAGE 2 DBP
2019 01-01-2018 12-31-2018 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR N DBP2 STAGE 2 DBP
2018 01-01-2017 12-31-2017 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR Y DBP2 STAGE 2 DBP
2017 01-01-2016 12-31-2016 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR Y DBP2 STAGE 2 DBP


Individual Violations
Violation No. Comp Prd Begin Date Comp Prd End Date Sample Point Viol Type Violation Name Comp Achieved Analyte Code Analyte Name
2020-4229 2019-04-01 00:00:00.0 2019-04-30 00:00:00.0 75 PUBLIC NOTICE RULE LINKED TO VIOLATION N 7500 PUBLIC NOTICE
2020-4232 2019-06-01 00:00:00.0 2019-06-30 00:00:00.0 75 PUBLIC NOTICE RULE LINKED TO VIOLATION N 7500 PUBLIC NOTICE
2020-4231 2019-05-01 00:00:00.0 2019-05-31 00:00:00.0 75 PUBLIC NOTICE RULE LINKED TO VIOLATION N 7500 PUBLIC NOTICE
2020-4230 2019-07-01 00:00:00.0 2019-07-31 00:00:00.0 75 PUBLIC NOTICE RULE LINKED TO VIOLATION N 7500 PUBLIC NOTICE
2020-4228 2020-06-01 00:00:00.0 2020-06-30 00:00:00.0 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR N 0999 CHLORINE
2020-4227 2020-05-01 00:00:00.0 2020-05-31 00:00:00.0 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR N 0999 CHLORINE
2020-4226 2020-04-01 00:00:00.0 2020-04-30 00:00:00.0 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR N 0999 CHLORINE
2020-4225 2019-03-01 00:00:00.0 2019-03-31 00:00:00.0 75 PUBLIC NOTICE RULE LINKED TO VIOLATION N 7500 PUBLIC NOTICE
2020-4224 2020-04-01 00:00:00.0 2020-04-30 00:00:00.0 3A MONITORING, ROUTINE, MAJOR (RTCR) Y 3014 E. COLI
2020-4223 2020-02-01 00:00:00.0 2020-02-29 00:00:00.0 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR N 0999 CHLORINE
2020-4221 2020-03-01 00:00:00.0 2020-03-31 00:00:00.0 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR N 0999 CHLORINE
2020-4222 2020-01-01 00:00:00.0 2020-01-31 00:00:00.0 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR N 0999 CHLORINE
2020-4220 2020-02-01 00:00:00.0 2020-02-29 00:00:00.0 3A MONITORING, ROUTINE, MAJOR (RTCR) Y 3014 E. COLI
2020-4218 2020-01-01 00:00:00.0 null 75 PUBLIC NOTICE RULE LINKED TO VIOLATION N 7500 PUBLIC NOTICE
2020-4216 2018-10-01 00:00:00.0 2018-10-31 00:00:00.0 75 PUBLIC NOTICE RULE LINKED TO VIOLATION N 7500 PUBLIC NOTICE
2020-4215 2020-01-01 00:00:00.0 2020-03-31 00:00:00.0 EPDS001 02 MCL, AVERAGE N 1005 ARSENIC
2020-4214 2019-10-01 00:00:00.0 2019-10-31 00:00:00.0 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR N 0999 CHLORINE
2020-4213 2019-11-01 00:00:00.0 2019-11-30 00:00:00.0 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR N 0999 CHLORINE
2020-4212 2019-12-01 00:00:00.0 2019-12-31 00:00:00.0 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR N 0999 CHLORINE
2020-4210 2020-01-01 00:00:00.0 null 66 LEAD CONSUMER NOTICE (LCR) N 5000 LEAD & COPPER RULE
2020-4207 2019-10-01 00:00:00.0 2019-12-31 00:00:00.0 EPDS001 02 MCL, AVERAGE N 1005 ARSENIC
2020-4204 2019-07-01 00:00:00.0 2019-07-31 00:00:00.0 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR N 0999 CHLORINE
2020-4205 2019-08-01 00:00:00.0 2019-08-31 00:00:00.0 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR N 0999 CHLORINE
2020-4206 2019-09-01 00:00:00.0 2019-09-30 00:00:00.0 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR N 0999 CHLORINE
2020-4203 2019-10-02 00:00:00.0 null 72 CCR ADEQUACY/AVAILABILITY/CONTENT N 7000 CONSUMER CONFIDENCE RULE
2019-4202 2019-07-01 00:00:00.0 2019-09-30 00:00:00.0 EPDS001 02 MCL, AVERAGE N 1005 ARSENIC
2019-4201 2019-07-01 00:00:00.0 2019-07-31 00:00:00.0 3A MONITORING, ROUTINE, MAJOR (RTCR) Y 3014 E. COLI
2019-4198 2019-06-01 00:00:00.0 2019-06-30 00:00:00.0 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR N 0999 CHLORINE
2019-4197 2019-05-01 00:00:00.0 2019-05-31 00:00:00.0 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR N 0999 CHLORINE
2019-4200 2019-04-01 00:00:00.0 2019-06-30 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 1005 ARSENIC
2019-4199 2019-04-01 00:00:00.0 2019-04-30 00:00:00.0 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR N 0999 CHLORINE
2019-4196 2019-04-01 00:00:00.0 2019-06-30 00:00:00.0 EPDS001 02 MCL, AVERAGE N 1005 ARSENIC
2019-4193 2019-03-01 00:00:00.0 2019-03-31 00:00:00.0 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR N 0999 CHLORINE
2019-4194 2019-02-01 00:00:00.0 2019-02-28 00:00:00.0 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR N 0999 CHLORINE
2019-4195 2019-01-01 00:00:00.0 2019-01-31 00:00:00.0 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR N 0999 CHLORINE
2019-4192 2019-01-01 00:00:00.0 2019-03-31 00:00:00.0 EPDS001 02 MCL, AVERAGE N 1005 ARSENIC
2019-4191 2019-01-01 00:00:00.0 2019-03-31 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 1005 ARSENIC
2019-4190 2018-10-01 00:00:00.0 2018-12-31 00:00:00.0 EPDS001 02 MCL, AVERAGE N 1005 ARSENIC
2019-4187 2018-11-01 00:00:00.0 2018-11-30 00:00:00.0 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR N 0999 CHLORINE
2019-4188 2018-12-01 00:00:00.0 2018-12-31 00:00:00.0 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR N 0999 CHLORINE
2019-4189 2018-10-01 00:00:00.0 2018-10-31 00:00:00.0 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR N 0999 CHLORINE
2019-4184 2016-01-01 00:00:00.0 2018-12-31 00:00:00.0 DISTRIBUTION SYSTEM 52 FOLLOW-UP OR ROUTINE TAP M/R (LCR) Y 5000 LEAD & COPPER RULE
2019-4181 2018-09-01 00:00:00.0 2018-09-30 00:00:00.0 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR N 0999 CHLORINE
2019-4183 2018-07-01 00:00:00.0 2018-07-31 00:00:00.0 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR N 0999 CHLORINE
2019-4182 2018-08-01 00:00:00.0 2018-08-31 00:00:00.0 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR N 0999 CHLORINE
2019-4180 2018-09-01 00:00:00.0 2018-09-30 00:00:00.0 4B REPORT SAMPLE RESULT/FAIL MONITOR RTCR Y 3014 E. COLI
2018-4177 2018-06-01 00:00:00.0 2018-06-30 00:00:00.0 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR N 0999 CHLORINE
2018-4178 2018-05-01 00:00:00.0 2018-05-31 00:00:00.0 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR N 0999 CHLORINE
2018-4176 2018-05-01 00:00:00.0 2018-05-31 00:00:00.0 3A MONITORING, ROUTINE, MAJOR (RTCR) Y 3014 E. COLI
2017-4173 2017-04-01 00:00:00.0 2017-06-30 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 1005 ARSENIC
2017-4172 2017-01-01 00:00:00.0 2017-03-31 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 1005 ARSENIC
2017-4171 2016-10-01 00:00:00.0 2016-12-31 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 1005 ARSENIC
2016-4167 2016-04-01 00:00:00.0 2016-06-30 00:00:00.0 EPDS001 02 MCL, AVERAGE Y 1005 ARSENIC
2016-4164 2016-01-01 00:00:00.0 2016-03-31 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 1005 ARSENIC
2016-4163 2016-01-01 00:00:00.0 2016-03-31 00:00:00.0 EPDS001 02 MCL, AVERAGE Y 1005 ARSENIC
2016-4166 2015-10-01 00:00:00.0 2015-12-31 00:00:00.0 EPDS001 02 MCL, AVERAGE Y 1005 ARSENIC
2016-4165 2015-07-01 00:00:00.0 2015-09-30 00:00:00.0 EPDS001 02 MCL, AVERAGE Y 1005 ARSENIC
2016-4162 2015-07-01 00:00:00.0 2016-06-30 00:00:00.0 71 CCR REPORT Y 7000 CONSUMER CONFIDENCE RULE
2016-4161 2015-10-01 00:00:00.0 2016-09-30 00:00:00.0 72 CCR ADEQUACY/AVAILABILITY/CONTENT Y 7000 CONSUMER CONFIDENCE RULE
2015-4160 2015-04-01 00:00:00.0 2015-06-30 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 1005 ARSENIC
2015-4159 2015-04-01 00:00:00.0 2015-06-30 00:00:00.0 EPDS001 02 MCL, AVERAGE Y 1005 ARSENIC
2014-4139 2008-05-01 00:00:00.0 2008-05-31 00:00:00.0 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR Y 0999 CHLORINE
2014-4140 2008-04-01 00:00:00.0 2008-04-30 00:00:00.0 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR Y 0999 CHLORINE
2014-4138 2008-06-01 00:00:00.0 2008-06-30 00:00:00.0 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR Y 0999 CHLORINE
2013-4135 2011-07-01 00:00:00.0 2012-06-30 00:00:00.0 71 CCR REPORT Y 7000 CONSUMER CONFIDENCE RULE
2013-4134 2011-10-01 00:00:00.0 2012-09-30 00:00:00.0 72 CCR ADEQUACY/AVAILABILITY/CONTENT Y 7000 CONSUMER CONFIDENCE RULE
2013-4133 2009-07-01 00:00:00.0 2010-06-30 00:00:00.0 71 CCR REPORT Y 7000 CONSUMER CONFIDENCE RULE
2013-4132 2012-10-01 00:00:00.0 2013-09-30 00:00:00.0 72 CCR ADEQUACY/AVAILABILITY/CONTENT Y 7000 CONSUMER CONFIDENCE RULE
2013-4131 2012-07-01 00:00:00.0 2013-06-30 00:00:00.0 71 CCR REPORT Y 7000 CONSUMER CONFIDENCE RULE
2012-4130 2009-01-01 00:00:00.0 2009-12-31 00:00:00.0 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR Y 2456 TOTAL HALOACETIC ACIDS (HAA5)
2011-4129 2007-07-01 00:00:00.0 2007-12-31 00:00:00.0 DISTRIBUTION SYSTEM 51 INITIAL TAP SAMPLING (LCR) Y 5000 LEAD & COPPER RULE
2011-4128 2007-01-01 00:00:00.0 2007-06-30 00:00:00.0 DISTRIBUTION SYSTEM 51 INITIAL TAP SAMPLING (LCR) Y 5000 LEAD & COPPER RULE
2011-4127 2011-01-01 00:00:00.0 2011-03-31 00:00:00.0 EPDS001 01 MCL, SINGLE SAMPLE Y 1005 ARSENIC
2010-4126 2009-01-01 00:00:00.0 2009-12-31 00:00:00.0 DISTRIBUTION SYSTEM 52 FOLLOW-UP OR ROUTINE TAP M/R (LCR) Y 5000 LEAD & COPPER RULE
2010-4125 2008-07-01 00:00:00.0 2009-06-30 00:00:00.0 71 CCR REPORT Y 7000 CONSUMER CONFIDENCE RULE
2009-4124 2009-01-01 00:00:00.0 2009-03-31 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 1040 NITRATE
2009-4122 2008-09-01 00:00:00.0 2008-09-30 00:00:00.0 25 MONITORING (TCR), REPEAT MAJOR Y 3100 COLIFORM (TCR)
2009-4123 2008-09-01 00:00:00.0 2008-09-30 00:00:00.0 22 MCL (TCR), MONTHLY Y 3100 COLIFORM (TCR)
2009-4120 2008-02-01 00:00:00.0 2008-02-29 00:00:00.0 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR Y 0999 CHLORINE
2009-4119 2008-03-01 00:00:00.0 2008-03-31 00:00:00.0 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR Y 0999 CHLORINE
2009-4121 2008-01-01 00:00:00.0 2008-01-31 00:00:00.0 DISTRIBUTION SYSTEM 27 MONITORING, ROUTINE (DBP), MAJOR Y 0999 CHLORINE
2009-4115 2007-07-01 00:00:00.0 2008-06-30 00:00:00.0 71 CCR REPORT Y 7000 CONSUMER CONFIDENCE RULE
2008-4114 2008-04-01 00:00:00.0 2008-06-30 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 1040 NITRATE
2008-4113 2007-10-01 00:00:00.0 2007-12-31 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 1040 NITRATE
2007-4109 2006-07-01 00:00:00.0 2007-06-30 00:00:00.0 71 CCR REPORT Y 7000 CONSUMER CONFIDENCE RULE
2006-4107 2006-09-01 00:00:00.0 2006-09-30 00:00:00.0 23 MONITORING (TCR), ROUTINE MAJOR Y 3100 COLIFORM (TCR)
2007-4106 2005-07-01 00:00:00.0 2006-06-30 00:00:00.0 71 CCR REPORT Y 7000 CONSUMER CONFIDENCE RULE
2005-3905 2004-07-01 00:00:00.0 2004-12-31 00:00:00.0 51 INITIAL TAP SAMPLING (LCR) Y 5000 LEAD & COPPER RULE
2005-3805 2004-07-01 00:00:00.0 2005-06-30 00:00:00.0 71 CCR REPORT Y 7000 CONSUMER CONFIDENCE RULE
2005-3705 2003-07-01 00:00:00.0 2004-06-30 00:00:00.0 71 CCR REPORT Y 7000 CONSUMER CONFIDENCE RULE
2005-3605 2002-07-01 00:00:00.0 2003-06-30 00:00:00.0 71 CCR REPORT Y 7000 CONSUMER CONFIDENCE RULE
2004-3504 2004-01-01 00:00:00.0 2004-06-30 00:00:00.0 51 INITIAL TAP SAMPLING (LCR) Y 5000 LEAD & COPPER RULE
2002-302 2001-01-01 00:00:00.0 2001-12-31 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 2378 1,2,4-TRICHLOROBENZENE
2001-201 2000-07-01 00:00:00.0 2000-09-30 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 1025 FLUORIDE
2000-100 2000-01-01 00:00:00.0 2002-12-31 00:00:00.0 EPDS001 02 MCL, AVERAGE Y 1025 FLUORIDE
1999-2399 1997-01-01 00:00:00.0 1999-12-31 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 2105 2,4-D
1999-2499 1997-01-01 00:00:00.0 1999-12-31 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 2110 2,4,5-TP
1999-2599 1997-01-01 00:00:00.0 1999-12-31 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 2274 HEXACHLOROBENZENE
1999-2799 1997-01-01 00:00:00.0 1999-12-31 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 2326 PENTACHLOROPHENOL
1999-2899 1997-01-01 00:00:00.0 1999-12-31 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 2931 1,2-DIBROMO-3-CHLOROPROPANE
1999-2999 1997-01-01 00:00:00.0 1999-12-31 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 2946 ETHYLENE DIBROMIDE
1999-3099 1997-01-01 00:00:00.0 1999-12-31 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 2959 CHLORDANE
1999-599 1997-01-01 00:00:00.0 1999-12-31 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 2010 BHC-GAMMA
1999-699 1997-01-01 00:00:00.0 1999-12-31 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 2015 METHOXYCHLOR
1999-799 1997-01-01 00:00:00.0 1999-12-31 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 2020 TOXAPHENE
1999-899 1997-01-01 00:00:00.0 1999-12-31 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 2031 DALAPON
1999-1099 1997-01-01 00:00:00.0 1999-12-31 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 2033 ENDOTHALL
1999-1299 1997-01-01 00:00:00.0 1999-12-31 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 2036 OXAMYL
1999-1399 1997-01-01 00:00:00.0 1999-12-31 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 2037 SIMAZINE
1999-1499 1997-01-01 00:00:00.0 1999-12-31 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 2039 DI(2-ETHYLHEXYL) PHTHALATE
1999-1599 1997-01-01 00:00:00.0 1999-12-31 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 2040 PICLORAM
1999-1699 1997-01-01 00:00:00.0 1999-12-31 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 2041 DINOSEB
1999-1899 1997-01-01 00:00:00.0 1999-12-31 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 2046 CARBOFURAN
1999-1999 1997-01-01 00:00:00.0 1999-12-31 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 2050 ATRAZINE
1999-2099 1997-01-01 00:00:00.0 1999-12-31 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 2051 LASSO
1999-2199 1997-01-01 00:00:00.0 1999-12-31 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 2065 HEPTACHLOR
1999-2299 1997-01-01 00:00:00.0 1999-12-31 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 2067 HEPTACHLOR EPOXIDE
1999-2699 1997-01-01 00:00:00.0 1999-12-31 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 2306 BENZO(A)PYRENE
1999-499 1997-01-01 00:00:00.0 1999-12-31 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 2005 ENDRIN
1999-999 1997-01-01 00:00:00.0 1999-12-31 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 2032 DIQUAT
1999-1199 1997-01-01 00:00:00.0 1999-12-31 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 2035 DI(2-ETHYLHEXYL) ADIPATE
1999-1799 1997-01-01 00:00:00.0 1999-12-31 00:00:00.0 EPDS001 03 MONITORING, ROUTINE MAJOR Y 2042 HEXACHLOROCYCLOPENTADIENE