Date:05-18-2024STATE OF CALIFORNIA 
LAST AND NEXT SAMPLE REPORT
SYSTEM NO.:0710009SYSTEM NAME:TOWN OF DISCOVERY BAYCOUNTY:CONTRA COSTA 
SOURCE NO.:007SOURCE NAME:WELL 04ASOURCE CLASS:CLGSSTATUS: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
CA0710009_007_007 SECONDARY/GP-202405 1928 ALKALINITY, BICARBONATE 310.000 MG/L 05-27-2021 36 2024/05 DUE NOW
CA0710009_007_007 SECONDARY/GP-202405 1919 CALCIUM 56.000 MG/L 05-26-2021 36 2024/05 DUE NOW
CA0710009_007_007 SECONDARY/GP-202405 1929 ALKALINITY, CARBONATE < 10.000 MG/L 05-27-2021 36 2024/05 DUE NOW
CA0710009_007_007 SECONDARY/GP-202405 1017 CHLORIDE 109.000 MG/L 500 05-26-2021 36 2024/05 DUE NOW
CA0710009_007_007 SECONDARY/GP-202405 1905 COLOR < 5.000 UNITS 15 05-26-2021 36 2024/05 DUE NOW
CA0710009_007_007 SECONDARY/GP-202405 1022 COPPER, FREE < 50.000 UG/L 1000 50 05-26-2021 36 2024/05 DUE NOW
CA0710009_007_007 SECONDARY/GP-202405 2905 FOAMING AGENTS (SURFACTANTS) < 0.100 MG/L .5 05-26-2021 36 2024/05 DUE NOW
CA0710009_007_007 SECONDARY/GP-202405 1915 HARDNESS, TOTAL (AS CACO3) 255.000 MG/L 05-26-2021 36 2024/05 DUE NOW
CA0710009_007_007 SECONDARY/GP-202405 1021 HYDROXIDE AS CALCIUM CARBONATE < 10.000 MG/L 05-27-2021 36 2024/05 DUE NOW
CA0710009_007_007 SECONDARY/GP-202405 1028 IRON < 100.000 UG/L 300 100 05-27-2021 36 2024/05 DUE NOW
CA0710009_007_007 SECONDARY/GP-202405 1031 MAGNESIUM 28.000 MG/L 05-26-2021 36 2024/05 DUE NOW
CA0710009_007_007 SECONDARY/GP-202405 1032 MANGANESE 100.000 20.000 UG/L 50 20 05-27-2021 36 2024/05 DUE NOW
CA0710009_007_007 SECONDARY/GP-202405 1920 ODOR < 1.000 TON 3 1 05-26-2021 36 2024/05 DUE NOW
CA0710009_007_007 SECONDARY/GP-202501 1925 PH 8.300 pH 01-20-2022 36 2025/01
CA0710009_007_007 SECONDARY/GP-202405 1050 SILVER < 10.000 UG/L 100 10 05-26-2021 36 2024/05 DUE NOW
CA0710009_007_007 SECONDARY/GP-202405 1052 SODIUM 125.000 MG/L 05-26-2021 36 2024/05 DUE NOW
CA0710009_007_007 SECONDARY/GP-202501 1064 CONDUCTIVITY @ 25 C UMHOS/CM 998.000 UMHO/CM 1600 01-20-2022 36 2025/01
CA0710009_007_007 SECONDARY/GP-202405 1055 SULFATE 107.000 0.500 MG/L 500 .5 05-26-2021 36 2024/05 DUE NOW
CA0710009_007_007 SECONDARY/GP-202501 1930 TDS 620.000 40.000 MG/L 1000 01-20-2022 36 2025/01
CA0710009_007_007 SECONDARY/GP-202405 0100 TURBIDITY 0.200 0.100 NTU 5 .1 05-26-2021 36 2024/05 DUE NOW
CA0710009_007_007 SECONDARY/GP-202405 1095 ZINC < 50.000 UG/L 5000 50 05-26-2021 36 2024/05 DUE NOW
CA0710009_007_007 INORGANIC-202405 1002 ALUMINUM < 50.000 UG/L 1000 50 05-26-2021 36 2024/05 DUE NOW
CA0710009_007_007 INORGANIC-202405 1074 ANTIMONY, TOTAL < 6.000 UG/L 6 6 05-26-2021 36 2024/05 DUE NOW
CA0710009_007_007 INORGANIC-202405 1005 ARSENIC 2.000 2.000 UG/L 10 2 05-26-2021 36 2024/05 DUE NOW
CA0710009_007_007 INORGANIC-202405 1010 BARIUM < 100.000 UG/L 1000 100 05-26-2021 36 2024/05 DUE NOW
CA0710009_007_007 INORGANIC-202405 1075 BERYLLIUM, TOTAL < 1.000 UG/L 4 1 05-26-2021 36 2024/05 DUE NOW
CA0710009_007_007 INORGANIC-202405 1015 CADMIUM < 1.000 UG/L 5 1 05-26-2021 36 2024/05 DUE NOW
CA0710009_007_007 INORGANIC-202405 1020 CHROMIUM < 10.000 UG/L 50 10 05-26-2021 36 2024/05 DUE NOW
CA0710009_007_007 INORGANIC-202405 1025 FLUORIDE 0.300 0.100 MG/L 2 .1 05-26-2021 36 2024/05 DUE NOW
CA0710009_007_007 INORGANIC-202405 1035 MERCURY < 1.000 UG/L 2 1 05-26-2021 36 2024/05 DUE NOW
CA0710009_007_007 INORGANIC-202405 1036 NICKEL < 10.000 UG/L 100 10 05-26-2021 36 2024/05 DUE NOW
CA0710009_007_007 INORGANIC-202405 1039 PERCHLORATE < 4.000 UG/L 6 4 05-26-2021 36 2024/05 DUE NOW
CA0710009_007_007 INORGANIC-202405 1045 SELENIUM < 5.000 UG/L 50 5 05-26-2021 36 2024/05 DUE NOW
CA0710009_007_007 INORGANIC-202405 1085 THALLIUM, TOTAL < 1.000 UG/L 2 1 05-26-2021 36 2024/05 DUE NOW
CA0710009_007_007 NITRATE/NITRITE-202404 1040 NITRATE < 0.400 MG/L 10 .4 04-19-2023 12 2024/04 DUE NOW
CA0710009_007_007 NITRATE/NITRITE-202405 1041 NITRITE < 0.400 MG/L 1 .4 05-26-2021 36 2024/05 DUE NOW
CA0710009_007_007 RADIOLOGICAL-202912 4109 GROSS ALPHA PARTICLE ACTIVITY 6.660 +/- 1.530 1.200 PCI/L 15 3 12-22-2020 108 2029/12
CA0710009_007_007 REGULATED VOC-202705 2981 1,1,1-TRICHLOROETHANE < 0.500 UG/L 200 .5 05-27-2021 72 2027/05
CA0710009_007_007 REGULATED VOC-202705 2988 1,1,2,2-TETRACHLOROETHANE < 0.500 UG/L 1 .5 05-27-2021 72 2027/05
CA0710009_007_007 REGULATED VOC-202705 2985 1,1,2-TRICHLOROETHANE < 0.500 UG/L 5 .5 05-27-2021 72 2027/05
CA0710009_007_007 REGULATED VOC-202705 2978 1,1-DICHLOROETHANE < 0.500 UG/L 5 .5 05-27-2021 72 2027/05
CA0710009_007_007 REGULATED VOC-202705 2977 1,1-DICHLOROETHYLENE < 0.500 UG/L 6 .5 05-27-2021 72 2027/05
CA0710009_007_007 REGULATED VOC-202705 2378 1,2,4-TRICHLOROBENZENE < 0.500 UG/L 5 .5 05-27-2021 72 2027/05
CA0710009_007_007 REGULATED VOC-202705 2968 O-DICHLOROBENZENE < 0.500 UG/L 600 .5 05-27-2021 72 2027/05
CA0710009_007_007 REGULATED VOC-202705 2980 1,2-DICHLOROETHANE < 0.500 UG/L .5 .5 05-27-2021 72 2027/05
CA0710009_007_007 REGULATED VOC-202705 2983 1,2-DICHLOROPROPANE < 0.500 UG/L 5 .5 05-27-2021 72 2027/05
CA0710009_007_007 REGULATED VOC-202705 2413 1,3-DICHLOROPROPENE < 0.500 UG/L .5 .5 05-27-2021 72 2027/05
CA0710009_007_007 REGULATED VOC-202705 2969 P-DICHLOROBENZENE < 0.500 UG/L 5 .5 05-27-2021 72 2027/05
CA0710009_007_007 REGULATED VOC-202705 2990 BENZENE < 0.500 UG/L 1 .5 05-27-2021 72 2027/05
CA0710009_007_007 REGULATED VOC-202705 2982 CARBON TETRACHLORIDE < 0.500 UG/L .5 .5 05-27-2021 72 2027/05
CA0710009_007_007 REGULATED VOC-202705 2380 CIS-1,2-DICHLOROETHYLENE < 0.500 UG/L 6 .5 05-27-2021 72 2027/05
CA0710009_007_007 REGULATED VOC-202705 2964 DICHLOROMETHANE < 0.500 UG/L 5 .5 05-27-2021 72 2027/05
CA0710009_007_007 REGULATED VOC-202405 2992 ETHYLBENZENE < 0.500 UG/L 300 .5 05-27-2021 36 2024/05 DUE NOW
CA0710009_007_007 REGULATED VOC-202405 2251 METHYL TERT-BUTYL ETHER < 3.000 UG/L 13 3 05-27-2021 36 2024/05 DUE NOW
CA0710009_007_007 REGULATED VOC-202705 2989 CHLOROBENZENE < 0.500 UG/L 70 .5 05-27-2021 72 2027/05
CA0710009_007_007 REGULATED VOC-202705 2996 STYRENE < 0.500 UG/L 100 .5 05-27-2021 72 2027/05
CA0710009_007_007 REGULATED VOC-202705 2987 TETRACHLOROETHYLENE < 0.500 UG/L 5 .5 05-27-2021 72 2027/05
CA0710009_007_007 REGULATED VOC-202705 2991 TOLUENE < 0.500 UG/L 150 .5 05-27-2021 72 2027/05
CA0710009_007_007 REGULATED VOC-202705 2979 TRANS-1,2-DICHLOROETHYLENE < 0.500 UG/L 10 .5 05-27-2021 72 2027/05
CA0710009_007_007 REGULATED VOC-202405 2984 TRICHLOROETHYLENE < 0.500 UG/L 5 .5 05-27-2021 36 2024/05 DUE NOW
CA0710009_007_007 REGULATED VOC-202705 2218 TRICHLOROFLUOROMETHANE < 5.000 UG/L 150 5 05-27-2021 72 2027/05
CA0710009_007_007 REGULATED VOC-202705 2904 TRICHLOROTRIFLUOROETHANE < 10.000 UG/L 1200 10 05-27-2021 72 2027/05
CA0710009_007_007 REGULATED VOC-202705 2976 VINYL CHLORIDE < 0.500 UG/L .5 .5 05-27-2021 72 2027/05
CA0710009_007_007 REGULATED VOC-202705 2955 XYLENES, TOTAL < 0.500 UG/L 1750 0.5 05-27-2021 72 2027/05
CA0710009_007_007 REGULATED SOC-202702 2414 1,2,3-TRICHLOROPROPANE < 0.005 UG/L 0.005 02-12-2024 36 2027/02
CA0710009_007_007 REGULATED SOC-203002 2063 2,3,7,8-TCDD < 0.005 NG/L 0.03 0.005 02-12-2024 72 2030/02
CA0710009_007_007 REGULATED SOC-203002 2110 2,4,5-TP < 1.000 UG/L 50 1 02-12-2024 72 2030/02
CA0710009_007_007 REGULATED SOC-203002 2105 2,4-D < 10.000 UG/L 70 10 02-12-2024 72 2030/02
CA0710009_007_007 REGULATED SOC-203002 2051 LASSO (ALACHLOR) < 1.000 UG/L 2 1 02-12-2024 72 2030/02
CA0710009_007_007 REGULATED SOC-203002 2050 ATRAZINE < 0.500 UG/L 1 .5 02-12-2024 72 2030/02
CA0710009_007_007 REGULATED SOC-203002 2625 BENTAZON < 2.000 UG/L 18 2 02-12-2024 72 2030/02
CA0710009_007_007 REGULATED SOC-203002 2306 BENZO(A)PYRENE < 0.100 UG/L .2 .1 02-12-2024 72 2030/02
CA0710009_007_007 REGULATED SOC-203002 2046 CARBOFURAN < 5.000 UG/L 18 5 02-12-2024 72 2030/02
CA0710009_007_007 REGULATED SOC-203002 2959 CHLORDANE < 0.100 UG/L .1 .1 02-12-2024 72 2030/02
CA0710009_007_007 REGULATED SOC-203002 2031 DALAPON < 10.000 UG/L 200 10 02-12-2024 72 2030/02
CA0710009_007_007 REGULATED SOC-203002 2035 DI(2-ETHYLHEXYL) ADIPATE < 5.000 UG/L 400 5 02-12-2024 72 2030/02
CA0710009_007_007 REGULATED SOC-203002 2039 DI(2-ETHYLHEXYL) PHTHALATE < 3.000 UG/L 4 3 02-12-2024 72 2030/02
CA0710009_007_007 REGULATED SOC-203002 2931 1,2-DIBROMO-3-CHLOROPROPANE < 0.010 UG/L .2 .01 02-12-2024 72 2030/02
CA0710009_007_007 REGULATED SOC-203002 2041 DINOSEB < 2.000 UG/L 7 2 02-12-2024 72 2030/02
CA0710009_007_007 REGULATED SOC-203002 2032 DIQUAT < 4.000 UG/L 20 4 02-12-2024 72 2030/02
CA0710009_007_007 REGULATED SOC-203002 2033 ENDOTHALL < 45.000 UG/L 100 45 02-12-2024 72 2030/02
CA0710009_007_007 REGULATED SOC-203002 2005 ENDRIN < 0.100 UG/L 2 .1 02-12-2024 72 2030/02
CA0710009_007_007 REGULATED SOC-203002 2946 ETHYLENE DIBROMIDE < 0.020 UG/L .05 .02 02-12-2024 72 2030/02
CA0710009_007_007 REGULATED SOC-203002 2034 GLYPHOSATE < 25.000 UG/L 700 25 02-12-2024 72 2030/02
CA0710009_007_007 REGULATED SOC-203002 2065 HEPTACHLOR < 0.010 UG/L .01 .01 02-12-2024 72 2030/02
CA0710009_007_007 REGULATED SOC-203002 2067 HEPTACHLOR EPOXIDE < 0.010 UG/L .01 .01 02-12-2024 72 2030/02
CA0710009_007_007 REGULATED SOC-203002 2042 HEXACHLOROCYCLOPENTADIENE < 1.000 UG/L 50 1 02-12-2024 72 2030/02
CA0710009_007_007 REGULATED SOC-203002 2010 BHC-GAMMA < 0.200 UG/L .2 .2 02-12-2024 72 2030/02
CA0710009_007_007 REGULATED SOC-203002 2015 METHOXYCHLOR < 10.000 UG/L 30 10 02-12-2024 72 2030/02
CA0710009_007_007 REGULATED SOC-203002 2626 MOLINATE < 2.000 UG/L 20 2 02-12-2024 72 2030/02
CA0710009_007_007 REGULATED SOC-203002 2036 OXAMYL < 20.000 UG/L 50 20 02-12-2024 72 2030/02
CA0710009_007_007 REGULATED SOC-203002 2326 PENTACHLOROPHENOL < 0.200 UG/L 1 .2 02-12-2024 72 2030/02
CA0710009_007_007 REGULATED SOC-203002 2040 PICLORAM < 1.000 UG/L 500 1 02-12-2024 72 2030/02
CA0710009_007_007 REGULATED SOC-201708 2383 TOTAL POLYCHLORINATED BIPHENYLS (PCB) < 0.500 UG/L .5 .5 08-02-2011 72 2017/08 DUE NOW
CA0710009_007_007 REGULATED SOC-203002 2037 SIMAZINE < 1.000 UG/L 4 1 02-12-2024 72 2030/02
CA0710009_007_007 REGULATED SOC-203002 2727 THIOBENCARB (BOLERO) < 1.000 UG/L 70 1 02-12-2024 72 2030/02
CA0710009_007_007 REGULATED SOC-203002 2020 TOXAPHENE < 1.000 UG/L 3 1 02-12-2024 72 2030/02
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.