Date:05-18-2024STATE OF CALIFORNIA 
LAST AND NEXT SAMPLE REPORT
SYSTEM NO.:0710009SYSTEM NAME:TOWN OF DISCOVERY BAYCOUNTY:CONTRA COSTA 
SOURCE NO.:016SOURCE NAME:WELL 06SOURCE 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_016_016 SECONDARY/GP-202404 1928 ALKALINITY, BICARBONATE 400.000 MG/L 04-05-2021 36 2024/04 DUE NOW
CA0710009_016_016 SECONDARY/GP-202404 1919 CALCIUM 29.000 MG/L 04-05-2021 36 2024/04 DUE NOW
CA0710009_016_016 SECONDARY/GP-202404 1929 ALKALINITY, CARBONATE < 10.000 MG/L 04-05-2021 36 2024/04 DUE NOW
CA0710009_016_016 SECONDARY/GP-202404 1017 CHLORIDE 99.000 MG/L 500 04-05-2021 36 2024/04 DUE NOW
CA0710009_016_016 SECONDARY/GP-202404 1905 COLOR 5.000 UNITS 15 04-05-2021 36 2024/04 DUE NOW
CA0710009_016_016 SECONDARY/GP-202404 1022 COPPER, FREE < 50.000 UG/L 1000 50 04-05-2021 36 2024/04 DUE NOW
CA0710009_016_016 SECONDARY/GP-202404 2905 FOAMING AGENTS (SURFACTANTS) < 0.100 MG/L .5 04-05-2021 36 2024/04 DUE NOW
CA0710009_016_016 SECONDARY/GP-202404 1915 HARDNESS, TOTAL (AS CACO3) 130.000 MG/L 04-05-2021 36 2024/04 DUE NOW
CA0710009_016_016 SECONDARY/GP-202404 1021 HYDROXIDE AS CALCIUM CARBONATE < 10.000 MG/L 04-05-2021 36 2024/04 DUE NOW
CA0710009_016_016 SECONDARY/GP-202404 1028 IRON < 100.000 UG/L 300 100 04-05-2021 36 2024/04 DUE NOW
CA0710009_016_016 SECONDARY/GP-202404 1031 MAGNESIUM 14.000 MG/L 04-05-2021 36 2024/04 DUE NOW
CA0710009_016_016 SECONDARY/GP-202404 1032 MANGANESE 100.000 20.000 UG/L 50 20 04-05-2021 36 2024/04 DUE NOW
CA0710009_016_016 SECONDARY/GP-202404 1920 ODOR < 1.000 TON 3 1 04-05-2021 36 2024/04 DUE NOW
CA0710009_016_016 SECONDARY/GP-202501 1925 PH 8.400 pH 01-20-2022 36 2025/01
CA0710009_016_016 SECONDARY/GP-202404 1050 SILVER < 10.000 UG/L 100 10 04-05-2021 36 2024/04 DUE NOW
CA0710009_016_016 SECONDARY/GP-202404 1052 SODIUM 166.000 MG/L 04-05-2021 36 2024/04 DUE NOW
CA0710009_016_016 SECONDARY/GP-202501 1064 CONDUCTIVITY @ 25 C UMHOS/CM 1000.000 UMHO/CM 1600 01-20-2022 36 2025/01
CA0710009_016_016 SECONDARY/GP-202404 1055 SULFATE 52.300 0.500 MG/L 500 .5 04-05-2021 36 2024/04 DUE NOW
CA0710009_016_016 SECONDARY/GP-202501 1930 TDS 620.000 40.000 MG/L 1000 01-20-2022 36 2025/01
CA0710009_016_016 SECONDARY/GP-202404 0100 TURBIDITY < 0.100 NTU 5 .1 04-05-2021 36 2024/04 DUE NOW
CA0710009_016_016 SECONDARY/GP-202404 1095 ZINC < 50.000 UG/L 5000 50 04-05-2021 36 2024/04 DUE NOW
CA0710009_016_016 INORGANIC-202404 1002 ALUMINUM < 50.000 UG/L 1000 50 04-05-2021 36 2024/04 DUE NOW
CA0710009_016_016 INORGANIC-202404 1074 ANTIMONY, TOTAL < 6.000 UG/L 6 6 04-05-2021 36 2024/04 DUE NOW
CA0710009_016_016 INORGANIC-202404 1005 ARSENIC < 2.000 UG/L 10 2 04-05-2021 36 2024/04 DUE NOW
CA0710009_016_016 INORGANIC-202404 1010 BARIUM < 100.000 UG/L 1000 100 04-05-2021 36 2024/04 DUE NOW
CA0710009_016_016 INORGANIC-202404 1075 BERYLLIUM, TOTAL < 1.000 UG/L 4 1 04-05-2021 36 2024/04 DUE NOW
CA0710009_016_016 INORGANIC-202404 1015 CADMIUM < 1.000 UG/L 5 1 04-05-2021 36 2024/04 DUE NOW
CA0710009_016_016 INORGANIC-202404 1020 CHROMIUM < 10.000 UG/L 50 10 04-05-2021 36 2024/04 DUE NOW
CA0710009_016_016 INORGANIC-202404 1025 FLUORIDE 0.200 0.100 MG/L 2 .1 04-05-2021 36 2024/04 DUE NOW
CA0710009_016_016 INORGANIC-202404 1035 MERCURY < 1.000 UG/L 2 1 04-05-2021 36 2024/04 DUE NOW
CA0710009_016_016 INORGANIC-202404 1036 NICKEL < 10.000 UG/L 100 10 04-05-2021 36 2024/04 DUE NOW
CA0710009_016_016 INORGANIC-202404 1039 PERCHLORATE < 4.000 UG/L 6 4 04-05-2021 36 2024/04 DUE NOW
CA0710009_016_016 INORGANIC-202404 1045 SELENIUM < 5.000 UG/L 50 5 04-05-2021 36 2024/04 DUE NOW
CA0710009_016_016 INORGANIC-202404 1085 THALLIUM, TOTAL < 1.000 UG/L 2 1 04-05-2021 36 2024/04 DUE NOW
CA0710009_016_016 NITRATE/NITRITE-202404 1040 NITRATE < 0.400 MG/L 10 .4 04-19-2023 12 2024/04 DUE NOW
CA0710009_016_016 NITRATE/NITRITE-202404 1041 NITRITE < 0.400 MG/L 1 .4 04-05-2021 36 2024/04 DUE NOW
CA0710009_016_016 RADIOLOGICAL-202905 4109 GROSS ALPHA PARTICLE ACTIVITY 2.380 +/- 0.822 0.900 PCI/L 15 3 05-26-2020 108 2029/05
CA0710009_016_016 REGULATED VOC-202704 2981 1,1,1-TRICHLOROETHANE < 0.500 UG/L 200 .5 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED VOC-202704 2988 1,1,2,2-TETRACHLOROETHANE < 0.500 UG/L 1 .5 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED VOC-202704 2985 1,1,2-TRICHLOROETHANE < 0.500 UG/L 5 .5 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED VOC-202704 2978 1,1-DICHLOROETHANE < 0.500 UG/L 5 .5 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED VOC-202704 2977 1,1-DICHLOROETHYLENE < 0.500 UG/L 6 .5 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED VOC-202704 2378 1,2,4-TRICHLOROBENZENE < 0.500 UG/L 5 .5 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED VOC-202704 2968 O-DICHLOROBENZENE < 0.500 UG/L 600 .5 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED VOC-202704 2980 1,2-DICHLOROETHANE < 0.500 UG/L .5 .5 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED VOC-202704 2983 1,2-DICHLOROPROPANE < 0.500 UG/L 5 .5 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED VOC-202704 2413 1,3-DICHLOROPROPENE < 0.500 UG/L .5 .5 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED VOC-202704 2969 P-DICHLOROBENZENE < 0.500 UG/L 5 .5 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED VOC-202704 2990 BENZENE < 0.500 UG/L 1 .5 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED VOC-202704 2982 CARBON TETRACHLORIDE < 0.500 UG/L .5 .5 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED VOC-202704 2380 CIS-1,2-DICHLOROETHYLENE < 0.500 UG/L 6 .5 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED VOC-202704 2964 DICHLOROMETHANE < 0.500 UG/L 5 .5 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED VOC-202704 2992 ETHYLBENZENE < 0.500 UG/L 300 .5 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED VOC-202704 2251 METHYL TERT-BUTYL ETHER < 3.000 UG/L 13 3 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED VOC-202704 2989 CHLOROBENZENE < 0.500 UG/L 70 .5 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED VOC-202704 2996 STYRENE < 0.500 UG/L 100 .5 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED VOC-202704 2987 TETRACHLOROETHYLENE < 0.500 UG/L 5 .5 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED VOC-202704 2991 TOLUENE < 0.500 UG/L 150 .5 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED VOC-202704 2979 TRANS-1,2-DICHLOROETHYLENE < 0.500 UG/L 10 .5 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED VOC-202704 2984 TRICHLOROETHYLENE < 0.500 UG/L 5 .5 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED VOC-202704 2218 TRICHLOROFLUOROMETHANE < 5.000 UG/L 150 5 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED VOC-202704 2904 TRICHLOROTRIFLUOROETHANE < 10.000 UG/L 1200 10 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED VOC-202704 2976 VINYL CHLORIDE < 0.500 UG/L .5 .5 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED VOC-202704 2955 XYLENES, TOTAL < 0.500 UG/L 1750 0.5 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED SOC-202610 2414 1,2,3-TRICHLOROPROPANE < 0.005 UG/L 0.005 10-24-2023 36 2026/10
CA0710009_016_016 REGULATED SOC-202704 2063 2,3,7,8-TCDD < NG/L 0.03 0.005 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED SOC-202704 2110 2,4,5-TP < 1.000 UG/L 50 1 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED SOC-202704 2105 2,4-D < 10.000 UG/L 70 10 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED SOC-202903 2051 LASSO (ALACHLOR) < 1.000 UG/L 2 1 03-15-2023 72 2029/03
CA0710009_016_016 REGULATED SOC-202903 2050 ATRAZINE < 0.500 UG/L 1 .5 03-15-2023 72 2029/03
CA0710009_016_016 REGULATED SOC-202704 2625 BENTAZON < 2.000 UG/L 18 2 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED SOC-202903 2306 BENZO(A)PYRENE < 0.100 UG/L .2 .1 03-15-2023 72 2029/03
CA0710009_016_016 REGULATED SOC-202705 2046 CARBOFURAN < 5.000 UG/L 18 5 05-27-2021 72 2027/05
CA0710009_016_016 REGULATED SOC-202704 2959 CHLORDANE < 0.100 UG/L .1 .1 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED SOC-202704 2031 DALAPON < 10.000 UG/L 200 10 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED SOC-202903 2035 DI(2-ETHYLHEXYL) ADIPATE < 5.000 UG/L 400 5 03-15-2023 72 2029/03
CA0710009_016_016 REGULATED SOC-202903 2039 DI(2-ETHYLHEXYL) PHTHALATE < 3.000 UG/L 4 3 03-15-2023 72 2029/03
CA0710009_016_016 REGULATED SOC-202910 2931 1,2-DIBROMO-3-CHLOROPROPANE < 0.010 UG/L .2 .01 10-04-2023 72 2029/10
CA0710009_016_016 REGULATED SOC-202704 2041 DINOSEB < 2.000 UG/L 7 2 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED SOC-202704 2032 DIQUAT < 4.000 UG/L 20 4 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED SOC-202910 2033 ENDOTHALL < 45.000 UG/L 100 45 10-04-2023 72 2029/10
CA0710009_016_016 REGULATED SOC-202704 2005 ENDRIN < 0.100 UG/L 2 .1 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED SOC-202910 2946 ETHYLENE DIBROMIDE < 0.020 UG/L .05 .02 10-04-2023 72 2029/10
CA0710009_016_016 REGULATED SOC-202910 2034 GLYPHOSATE < 25.000 UG/L 700 25 10-04-2023 72 2029/10
CA0710009_016_016 REGULATED SOC-202704 2065 HEPTACHLOR < UG/L .01 .01 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED SOC-202704 2067 HEPTACHLOR EPOXIDE < UG/L .01 .01 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED SOC-202704 2274 HEXACHLOROBENZENE < 0.500 UG/L 1 .5 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED SOC-202704 2042 HEXACHLOROCYCLOPENTADIENE < 1.000 UG/L 50 1 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED SOC-202704 2010 BHC-GAMMA < 0.200 UG/L .2 .2 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED SOC-202704 2015 METHOXYCHLOR < 10.000 UG/L 30 10 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED SOC-202903 2626 MOLINATE < 2.000 UG/L 20 2 03-15-2023 72 2029/03
CA0710009_016_016 REGULATED SOC-202705 2036 OXAMYL < 20.000 UG/L 50 20 05-27-2021 72 2027/05
CA0710009_016_016 REGULATED SOC-202704 2326 PENTACHLOROPHENOL < 0.200 UG/L 1 .2 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED SOC-202704 2040 PICLORAM < 1.000 UG/L 500 1 04-05-2021 72 2027/04
CA0710009_016_016 REGULATED SOC-202910 2383 TOTAL POLYCHLORINATED BIPHENYLS (PCB) < 0.500 UG/L .5 .5 10-04-2023 72 2029/10
CA0710009_016_016 REGULATED SOC-202903 2037 SIMAZINE < 1.000 UG/L 4 1 03-15-2023 72 2029/03
CA0710009_016_016 REGULATED SOC-202903 2727 THIOBENCARB (BOLERO) < 1.000 UG/L 70 1 03-15-2023 72 2029/03
CA0710009_016_016 REGULATED SOC-202704 2020 TOXAPHENE < 1.000 UG/L 3 1 04-05-2021 72 2027/04
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.