Date:05-18-2024STATE OF CALIFORNIA 
LAST AND NEXT SAMPLE REPORT
SYSTEM NO.:0706004SYSTEM NAME:OAKLEY MUTUAL WATER COMPANYCOUNTY:CONTRA COSTA 
SOURCE NO.:001SOURCE NAME:NORTH WELL - 4384 SANDMOUNDSOURCE CLASS:CSGPSTATUS:A



Click to hide / show columns: PS Codes | Group Name | Analyte Number | Analyte Name | Detected Level |Less Than | RL | Unit | MCL | DLR | Last Sampled | Frequency | Next Due | Notes

PS Codes Group Name Analyte Number Analyte Name Results Unit MCL DLR Last Sampled Frequency Next Due Notes
Detected Level Less Than RL
CA0706004_001_001 SECONDARY/GP-202207 1928 ALKALINITY, BICARBONATE 350.000 MG/L 07-30-2019 36 2022/07 DUE NOW
CA0706004_001_001 SECONDARY/GP-202207 1919 CALCIUM 19.000 MG/L 07-30-2019 36 2022/07 DUE NOW
CA0706004_001_001 SECONDARY/GP-202207 1929 ALKALINITY, CARBONATE < MG/L 07-30-2019 36 2022/07 DUE NOW
CA0706004_001_001 SECONDARY/GP-202207 1017 CHLORIDE 140.000 MG/L 500 07-30-2019 36 2022/07 DUE NOW
CA0706004_001_001 SECONDARY/GP-202207 1905 COLOR < UNITS 15 07-30-2019 36 2022/07 DUE NOW
CA0706004_001_001 SECONDARY/GP-202207 1022 COPPER, FREE < 50.000 UG/L 1000 50 07-30-2019 36 2022/07 DUE NOW
CA0706004_001_001 SECONDARY/GP-202207 2905 FOAMING AGENTS (SURFACTANTS) < MG/L .5 07-30-2019 36 2022/07 DUE NOW
CA0706004_001_001 SECONDARY/GP-202207 1915 HARDNESS, TOTAL (AS CACO3) 94.000 MG/L 07-30-2019 36 2022/07 DUE NOW
CA0706004_001_001 SECONDARY/GP-202207 1021 HYDROXIDE AS CALCIUM CARBONATE < MG/L 07-30-2019 36 2022/07 DUE NOW
CA0706004_001_001 SECONDARY/GP-202207 1028 IRON < 100.000 UG/L 300 100 07-30-2019 36 2022/07 DUE NOW
CA0706004_001_001 SECONDARY/GP-202207 1031 MAGNESIUM 11.000 MG/L 07-30-2019 36 2022/07 DUE NOW
CA0706004_001_001 SECONDARY/GP-202207 1032 MANGANESE 140.000 20.000 UG/L 50 20 07-30-2019 36 2022/07 DUE NOW
CA0706004_001_001 SECONDARY/GP-202207 1920 ODOR 1.000 1.000 TON 3 1 07-30-2019 36 2022/07 DUE NOW
CA0706004_001_001 SECONDARY/GP-202207 1925 PH 8.030 pH 07-30-2019 36 2022/07 DUE NOW
CA0706004_001_001 SECONDARY/GP-202207 1050 SILVER < 10.000 UG/L 100 10 07-30-2019 36 2022/07 DUE NOW
CA0706004_001_001 SECONDARY/GP-202207 1052 SODIUM 230.000 MG/L 07-30-2019 36 2022/07 DUE NOW
CA0706004_001_001 SECONDARY/GP-202207 1064 CONDUCTIVITY @ 25 C UMHOS/CM 1100.000 UMHO/CM 1600 07-30-2019 36 2022/07 DUE NOW
CA0706004_001_001 SECONDARY/GP-202207 1055 SULFATE 79.000 0.500 MG/L 500 .5 07-30-2019 36 2022/07 DUE NOW
CA0706004_001_001 SECONDARY/GP-202207 1930 TDS 730.000 MG/L 1000 07-30-2019 36 2022/07 DUE NOW
CA0706004_001_001 SECONDARY/GP-202207 0100 TURBIDITY 0.320 0.100 NTU 5 .1 07-30-2019 36 2022/07 DUE NOW
CA0706004_001_001 SECONDARY/GP-202207 1095 ZINC < 50.000 UG/L 5000 50 07-30-2019 36 2022/07 DUE NOW
CA0706004_001_001 INORGANIC-202207 1002 ALUMINUM < 50.000 UG/L 1000 50 07-30-2019 36 2022/07 DUE NOW
CA0706004_001_001 INORGANIC-202207 1074 ANTIMONY, TOTAL < 6.000 UG/L 6 6 07-30-2019 36 2022/07 DUE NOW
CA0706004_001_001 INORGANIC-202702 1005 ARSENIC 14.000 2.000 UG/L 10 2 02-23-2024 36 2027/02
CA0706004_001_001 INORGANIC-202207 1010 BARIUM < 100.000 UG/L 1000 100 07-30-2019 36 2022/07 DUE NOW
CA0706004_001_001 INORGANIC-202207 1075 BERYLLIUM, TOTAL < 1.000 UG/L 4 1 07-30-2019 36 2022/07 DUE NOW
CA0706004_001_001 INORGANIC-202207 1015 CADMIUM < 1.000 UG/L 5 1 07-30-2019 36 2022/07 DUE NOW
CA0706004_001_001 INORGANIC-202207 1020 CHROMIUM < 10.000 UG/L 50 10 07-30-2019 36 2022/07 DUE NOW
CA0706004_001_001 INORGANIC-202207 1025 FLUORIDE < 0.100 MG/L 2 .1 07-30-2019 36 2022/07 DUE NOW
CA0706004_001_001 INORGANIC-202207 1035 MERCURY < 1.000 UG/L 2 1 07-30-2019 36 2022/07 DUE NOW
CA0706004_001_001 INORGANIC-202207 1036 NICKEL 19.000 10.000 UG/L 100 10 07-30-2019 36 2022/07 DUE NOW
CA0706004_001_001 INORGANIC-202207 1045 SELENIUM < 5.000 UG/L 50 5 07-30-2019 36 2022/07 DUE NOW
CA0706004_001_001 INORGANIC-202207 1085 THALLIUM, TOTAL < 1.000 UG/L 2 1 07-30-2019 36 2022/07 DUE NOW
CA0706004_001_001 NITRATE/NITRITE-202407 1040 NITRATE < 0.400 MG/L 10 .4 07-05-2023 12 2024/07
CA0706004_001_001 NITRATE/NITRITE-202207 1041 NITRITE < 0.400 MG/L 1 .4 07-30-2019 36 2022/07 DUE NOW
CA0706004_001_001 RADIOLOGICAL-202207 4109 GROSS ALPHA PARTICLE ACTIVITY 2.980 +/- 1.070 0.300 PCI/L 15 3 07-06-2016 72 2022/07 DUE NOW
CA0706004_001_001 REGULATED VOC-202207 2981 1,1,1-TRICHLOROETHANE < 0.500 UG/L 200 .5 07-06-2016 72 2022/07 DUE NOW
CA0706004_001_001 REGULATED VOC-202207 2988 1,1,2,2-TETRACHLOROETHANE < 0.500 UG/L 1 .5 07-06-2016 72 2022/07 DUE NOW
CA0706004_001_001 REGULATED VOC-202207 2985 1,1,2-TRICHLOROETHANE < 0.500 UG/L 5 .5 07-06-2016 72 2022/07 DUE NOW
CA0706004_001_001 REGULATED VOC-202207 2978 1,1-DICHLOROETHANE < 0.500 UG/L 5 .5 07-06-2016 72 2022/07 DUE NOW
CA0706004_001_001 REGULATED VOC-202207 2977 1,1-DICHLOROETHYLENE < 0.500 UG/L 6 .5 07-06-2016 72 2022/07 DUE NOW
CA0706004_001_001 REGULATED VOC-202207 2378 1,2,4-TRICHLOROBENZENE < 0.500 UG/L 5 .5 07-06-2016 72 2022/07 DUE NOW
CA0706004_001_001 REGULATED VOC-202207 2968 O-DICHLOROBENZENE < 0.500 UG/L 600 .5 07-06-2016 72 2022/07 DUE NOW
CA0706004_001_001 REGULATED VOC-202207 2980 1,2-DICHLOROETHANE < 0.500 UG/L .5 .5 07-06-2016 72 2022/07 DUE NOW
CA0706004_001_001 REGULATED VOC-202207 2983 1,2-DICHLOROPROPANE < 0.500 UG/L 5 .5 07-06-2016 72 2022/07 DUE NOW
CA0706004_001_001 REGULATED VOC-202207 2413 1,3-DICHLOROPROPENE < 0.500 UG/L .5 .5 07-06-2016 72 2022/07 DUE NOW
CA0706004_001_001 REGULATED VOC-202207 2969 P-DICHLOROBENZENE < 0.500 UG/L 5 .5 07-06-2016 72 2022/07 DUE NOW
CA0706004_001_001 REGULATED VOC-202207 2990 BENZENE < 0.500 UG/L 1 .5 07-06-2016 72 2022/07 DUE NOW
CA0706004_001_001 REGULATED VOC-202207 2982 CARBON TETRACHLORIDE < 0.500 UG/L .5 .5 07-06-2016 72 2022/07 DUE NOW
CA0706004_001_001 REGULATED VOC-202207 2380 CIS-1,2-DICHLOROETHYLENE < 0.500 UG/L 6 .5 07-06-2016 72 2022/07 DUE NOW
CA0706004_001_001 REGULATED VOC-202207 2964 DICHLOROMETHANE < 0.500 UG/L 5 .5 07-06-2016 72 2022/07 DUE NOW
CA0706004_001_001 REGULATED VOC-202207 2992 ETHYLBENZENE < 0.500 UG/L 300 .5 07-06-2016 72 2022/07 DUE NOW
CA0706004_001_001 REGULATED VOC-202207 2251 METHYL TERT-BUTYL ETHER < 3.000 UG/L 13 3 07-06-2016 72 2022/07 DUE NOW
CA0706004_001_001 REGULATED VOC-202207 2989 CHLOROBENZENE < 0.500 UG/L 70 .5 07-06-2016 72 2022/07 DUE NOW
CA0706004_001_001 REGULATED VOC-202207 2996 STYRENE < 0.500 UG/L 100 .5 07-06-2016 72 2022/07 DUE NOW
CA0706004_001_001 REGULATED VOC-202207 2987 TETRACHLOROETHYLENE < 0.500 UG/L 5 .5 07-06-2016 72 2022/07 DUE NOW
CA0706004_001_001 REGULATED VOC-202207 2991 TOLUENE < 0.500 UG/L 150 .5 07-06-2016 72 2022/07 DUE NOW
CA0706004_001_001 REGULATED VOC-202207 2979 TRANS-1,2-DICHLOROETHYLENE < 0.500 UG/L 10 .5 07-06-2016 72 2022/07 DUE NOW
CA0706004_001_001 REGULATED VOC-202207 2984 TRICHLOROETHYLENE < 0.500 UG/L 5 .5 07-06-2016 72 2022/07 DUE NOW
CA0706004_001_001 REGULATED VOC-202207 2218 TRICHLOROFLUOROMETHANE < 5.000 UG/L 150 5 07-06-2016 72 2022/07 DUE NOW
CA0706004_001_001 REGULATED VOC-202207 2904 TRICHLOROTRIFLUOROETHANE < 10.000 UG/L 1200 10 07-06-2016 72 2022/07 DUE NOW
CA0706004_001_001 REGULATED VOC-202207 2976 VINYL CHLORIDE < 0.500 UG/L .5 .5 07-06-2016 72 2022/07 DUE NOW
CA0706004_001_001 REGULATED VOC-202207 2955 XYLENES, TOTAL < 0.500 UG/L 1750 0.5 07-06-2016 72 2022/07 DUE NOW
PS Codes Group Name Analyte Number Analyte Name Detected Level Less Than RL Unit MCL DLR Last Sampled Frequency Next Due Notes

RL – Reporting Level means the level to which the laboratory reported the presence of an analyte. For radionuclides, Reporting Level is the MDA95.

DLR – Detection Limit for purposes of Reporting (DLR) means the designated minimum level at or above which any analytical finding of a contaminant in drinking water resulting from monitoring required under Chapter 15 of Title 22 shall be reported to the State Board (California Code of Regulations Section § 64400.34)

For addtional definitions, please refer to our data dictionary.