Date:05-15-2024STATE OF CALIFORNIA 
LAST AND NEXT SAMPLE REPORT
SYSTEM NO.:0710001SYSTEM NAME:CITY OF ANTIOCHCOUNTY:CONTRA COSTA 
SOURCE NO.:002SOURCE NAME:SAN JOAQUIN RIVER INTAKESOURCE CLASS:CLSSSTATUS: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
CA0710001_002_002 SECONDARY/GP-202502 1928 ALKALINITY, BICARBONATE 68.000 2.000 MG/L 02-07-2024 12 2025/02
CA0710001_002_002 SECONDARY/GP-202406 1919 CALCIUM 7.900 1.000 MG/L 06-07-2023 12 2024/06
CA0710001_002_002 SECONDARY/GP-202502 1929 ALKALINITY, CARBONATE < 2.000 MG/L 02-07-2024 12 2025/02
CA0710001_002_002 SECONDARY/GP-202406 1017 CHLORIDE 8.800 0.500 MG/L 500 06-07-2023 12 2024/06
CA0710001_002_002 SECONDARY/GP-202406 1905 COLOR 25.000 2.000 UNITS 15 06-07-2023 12 2024/06
CA0710001_002_002 SECONDARY/GP-202406 1022 COPPER, FREE < 50.000 UG/L 1000 50 06-07-2023 12 2024/06
CA0710001_002_002 SECONDARY/GP-202406 2905 FOAMING AGENTS (SURFACTANTS) < 0.100 MG/L .5 06-07-2023 12 2024/06
CA0710001_002_002 SECONDARY/GP-202406 1915 HARDNESS, TOTAL (AS CACO3) 35.000 3.000 MG/L 06-07-2023 12 2024/06
CA0710001_002_002 SECONDARY/GP-202502 1021 HYDROXIDE AS CALCIUM CARBONATE < 2.000 MG/L 02-07-2024 12 2025/02
CA0710001_002_002 SECONDARY/GP-202406 1028 IRON 630.000 10.000 UG/L 300 100 06-07-2023 12 2024/06
CA0710001_002_002 SECONDARY/GP-202406 1031 MAGNESIUM 3.700 0.100 MG/L 06-07-2023 12 2024/06
CA0710001_002_002 SECONDARY/GP-202406 1032 MANGANESE 22.000 2.000 UG/L 50 20 06-07-2023 12 2024/06
CA0710001_002_002 SECONDARY/GP-202406 1920 ODOR 2.000 1.000 TON 3 1 06-07-2023 12 2024/06
CA0710001_002_002 SECONDARY/GP-202406 1925 PH 7.700 0.010 pH 06-07-2023 12 2024/06
CA0710001_002_002 SECONDARY/GP-202406 1050 SILVER 2.700 0.500 UG/L 100 10 06-07-2023 12 2024/06
CA0710001_002_002 SECONDARY/GP-202406 1052 SODIUM 9.800 1.000 MG/L 06-07-2023 12 2024/06
CA0710001_002_002 SECONDARY/GP-202406 1064 CONDUCTIVITY @ 25 C UMHOS/CM 120.000 2.000 UMHO/CM 1600 06-07-2023 12 2024/06
CA0710001_002_002 SECONDARY/GP-202406 1055 SULFATE 6.700 0.250 MG/L 500 .5 06-07-2023 12 2024/06
CA0710001_002_002 SECONDARY/GP-202406 1930 TDS 82.000 20.000 MG/L 1000 06-07-2023 12 2024/06
CA0710001_002_002 SECONDARY/GP-202406 0100 TURBIDITY 7.800 0.100 NTU 5 .1 06-07-2023 12 2024/06
CA0710001_002_002 SECONDARY/GP-202406 1095 ZINC 87.000 20.000 UG/L 5000 50 06-07-2023 12 2024/06
CA0710001_002_002 INORGANIC-202406 1002 ALUMINUM 330.000 50.000 UG/L 1000 50 06-07-2023 12 2024/06
CA0710001_002_002 INORGANIC-202406 1074 ANTIMONY, TOTAL < 6.000 UG/L 6 6 06-07-2023 12 2024/06
CA0710001_002_002 INORGANIC-202406 1005 ARSENIC < 2.000 UG/L 10 2 06-07-2023 12 2024/06
CA0710001_002_002 INORGANIC-202706 1094 ASBESTOS < 0.200 MFL 7 .2 06-04-2018 108 2027/06
CA0710001_002_002 INORGANIC-202406 1010 BARIUM < 100.000 UG/L 1000 100 06-07-2023 12 2024/06
CA0710001_002_002 INORGANIC-202406 1075 BERYLLIUM, TOTAL < 1.000 UG/L 4 1 06-07-2023 12 2024/06
CA0710001_002_002 INORGANIC-202406 1015 CADMIUM < 1.000 UG/L 5 1 06-07-2023 12 2024/06
CA0710001_002_002 INORGANIC-202406 1020 CHROMIUM < 10.000 UG/L 50 10 06-07-2023 12 2024/06
CA0710001_002_002 INORGANIC-202406 1024 CYANIDE < 100.000 UG/L 150 100 06-07-2023 12 2024/06
CA0710001_002_002 INORGANIC-202406 1025 FLUORIDE < 0.100 MG/L 2 .1 06-07-2023 12 2024/06
CA0710001_002_002 INORGANIC-202406 1035 MERCURY < 1.000 UG/L 2 1 06-07-2023 12 2024/06
CA0710001_002_002 INORGANIC-202406 1036 NICKEL < 10.000 UG/L 100 10 06-07-2023 12 2024/06
CA0710001_002_002 INORGANIC-202406 1039 PERCHLORATE < 2.000 UG/L 6 2 06-07-2023 12 2024/06
CA0710001_002_002 INORGANIC-202406 1045 SELENIUM < 5.000 UG/L 50 5 06-07-2023 12 2024/06
CA0710001_002_002 INORGANIC-202406 1085 THALLIUM, TOTAL < 1.000 UG/L 2 1 06-07-2023 12 2024/06
CA0710001_002_002 NITRATE/NITRITE-202406 1040 NITRATE < 0.400 MG/L 10 .4 03-14-2024 3 2024/06
CA0710001_002_002 NITRATE/NITRITE-202703 1041 NITRITE < 0.400 MG/L 1 .4 03-14-2024 36 2027/03
CA0710001_002_002 RADIOLOGICAL-202706 4109 GROSS ALPHA PARTICLE ACTIVITY < 1.500 PCI/L 15 3 06-04-2018 108 2027/06
CA0710001_002_002 REGULATED VOC-202412 2981 1,1,1-TRICHLOROETHANE < 0.500 UG/L 200 .5 12-21-2023 12 2024/12
CA0710001_002_002 REGULATED VOC-202412 2988 1,1,2,2-TETRACHLOROETHANE < 0.500 UG/L 1 .5 12-21-2023 12 2024/12
CA0710001_002_002 REGULATED VOC-202412 2985 1,1,2-TRICHLOROETHANE < 0.500 UG/L 5 .5 12-21-2023 12 2024/12
CA0710001_002_002 REGULATED VOC-202412 2978 1,1-DICHLOROETHANE < 0.500 UG/L 5 .5 12-21-2023 12 2024/12
CA0710001_002_002 REGULATED VOC-202412 2977 1,1-DICHLOROETHYLENE < 0.500 UG/L 6 .5 12-21-2023 12 2024/12
CA0710001_002_002 REGULATED VOC-202412 2378 1,2,4-TRICHLOROBENZENE < 0.500 UG/L 5 .5 12-21-2023 12 2024/12
CA0710001_002_002 REGULATED VOC-202412 2968 O-DICHLOROBENZENE < 0.500 UG/L 600 .5 12-21-2023 12 2024/12
CA0710001_002_002 REGULATED VOC-202412 2980 1,2-DICHLOROETHANE < 0.500 UG/L .5 .5 12-21-2023 12 2024/12
CA0710001_002_002 REGULATED VOC-202412 2983 1,2-DICHLOROPROPANE < 0.500 UG/L 5 .5 12-21-2023 12 2024/12
CA0710001_002_002 REGULATED VOC-202412 2413 1,3-DICHLOROPROPENE < 0.500 UG/L .5 .5 12-21-2023 12 2024/12
CA0710001_002_002 REGULATED VOC-202412 2969 P-DICHLOROBENZENE < 0.500 UG/L 5 .5 12-21-2023 12 2024/12
CA0710001_002_002 REGULATED VOC-202412 2990 BENZENE < 0.500 UG/L 1 .5 12-21-2023 12 2024/12
CA0710001_002_002 REGULATED VOC-202412 2982 CARBON TETRACHLORIDE < 0.500 UG/L .5 .5 12-21-2023 12 2024/12
CA0710001_002_002 REGULATED VOC-202412 2380 CIS-1,2-DICHLOROETHYLENE < 0.500 UG/L 6 .5 12-21-2023 12 2024/12
CA0710001_002_002 REGULATED VOC-202412 2964 DICHLOROMETHANE < 0.500 UG/L 5 .5 12-21-2023 12 2024/12
CA0710001_002_002 REGULATED VOC-202412 2992 ETHYLBENZENE < 0.500 UG/L 300 .5 12-21-2023 12 2024/12
CA0710001_002_002 REGULATED VOC-202412 2251 METHYL TERT-BUTYL ETHER < 3.000 UG/L 13 3 12-21-2023 12 2024/12
CA0710001_002_002 REGULATED VOC-202412 2989 CHLOROBENZENE < 0.500 UG/L 70 .5 12-21-2023 12 2024/12
CA0710001_002_002 REGULATED VOC-202412 2996 STYRENE < 0.500 UG/L 100 .5 12-21-2023 12 2024/12
CA0710001_002_002 REGULATED VOC-202412 2987 TETRACHLOROETHYLENE < 0.500 UG/L 5 .5 12-21-2023 12 2024/12
CA0710001_002_002 REGULATED VOC-202412 2991 TOLUENE < 0.500 UG/L 150 .5 12-21-2023 12 2024/12
CA0710001_002_002 REGULATED VOC-202412 2979 TRANS-1,2-DICHLOROETHYLENE < 0.500 UG/L 10 .5 12-21-2023 12 2024/12
CA0710001_002_002 REGULATED VOC-202412 2984 TRICHLOROETHYLENE < 0.500 UG/L 5 .5 12-21-2023 12 2024/12
CA0710001_002_002 REGULATED VOC-202412 2218 TRICHLOROFLUOROMETHANE < 5.000 UG/L 150 5 12-21-2023 12 2024/12
CA0710001_002_002 REGULATED VOC-202412 2904 TRICHLOROTRIFLUOROETHANE < 10.000 UG/L 1200 10 12-21-2023 12 2024/12
CA0710001_002_002 REGULATED VOC-202412 2976 VINYL CHLORIDE < 0.500 UG/L .5 .5 12-21-2023 12 2024/12
CA0710001_002_002 REGULATED VOC-202412 2955 XYLENES, TOTAL < 0.500 UG/L 1750 0.5 12-21-2023 12 2024/12
CA0710001_002_002 REGULATED SOC-202510 2414 1,2,3-TRICHLOROPROPANE < 0.005 UG/L 0.005 10-24-2022 36 2025/10
CA0710001_002_002 REGULATED SOC-202509 2063 2,3,7,8-TCDD < 0.005 NG/L 0.03 0.005 09-08-2022 36 2025/09
CA0710001_002_002 REGULATED SOC-202509 2110 2,4,5-TP < 1.000 UG/L 50 1 09-08-2022 36 2025/09
CA0710001_002_002 REGULATED SOC-202509 2105 2,4-D < 10.000 UG/L 70 10 09-08-2022 36 2025/09
CA0710001_002_002 REGULATED SOC-202509 2051 LASSO (ALACHLOR) < 1.000 UG/L 2 1 09-08-2022 36 2025/09
CA0710001_002_002 REGULATED SOC-202509 2050 ATRAZINE < 0.500 UG/L 1 .5 09-08-2022 36 2025/09
CA0710001_002_002 REGULATED SOC-202503 2625 BENTAZON < 0.500 UG/L 18 2 03-15-2022 36 2025/03
CA0710001_002_002 REGULATED SOC-202509 2306 BENZO(A)PYRENE < 0.100 UG/L .2 .1 09-08-2022 36 2025/09
CA0710001_002_002 REGULATED SOC-202509 2046 CARBOFURAN < 5.000 UG/L 18 5 09-08-2022 36 2025/09
CA0710001_002_002 REGULATED SOC-202509 2959 CHLORDANE < 0.100 UG/L .1 .1 09-08-2022 36 2025/09
CA0710001_002_002 REGULATED SOC-202509 2031 DALAPON < 10.000 UG/L 200 10 09-08-2022 36 2025/09
CA0710001_002_002 REGULATED SOC-202509 2035 DI(2-ETHYLHEXYL) ADIPATE < 5.000 UG/L 400 5 09-08-2022 36 2025/09
CA0710001_002_002 REGULATED SOC-202509 2039 DI(2-ETHYLHEXYL) PHTHALATE < 3.000 UG/L 4 3 09-08-2022 36 2025/09
CA0710001_002_002 REGULATED SOC-202509 2931 1,2-DIBROMO-3-CHLOROPROPANE < 0.010 UG/L .2 .01 09-08-2022 36 2025/09
CA0710001_002_002 REGULATED SOC-202509 2041 DINOSEB < 2.000 UG/L 7 2 09-08-2022 36 2025/09
CA0710001_002_002 REGULATED SOC-202509 2032 DIQUAT < 4.000 UG/L 20 4 09-08-2022 36 2025/09
CA0710001_002_002 REGULATED SOC-202509 2033 ENDOTHALL < 45.000 UG/L 100 45 09-08-2022 36 2025/09
CA0710001_002_002 REGULATED SOC-202509 2005 ENDRIN < 0.100 UG/L 2 .1 09-08-2022 36 2025/09
CA0710001_002_002 REGULATED SOC-202509 2946 ETHYLENE DIBROMIDE < 0.020 UG/L .05 .02 09-08-2022 36 2025/09
CA0710001_002_002 REGULATED SOC-202509 2034 GLYPHOSATE < 25.000 UG/L 700 25 09-08-2022 36 2025/09
CA0710001_002_002 REGULATED SOC-202509 2065 HEPTACHLOR < 0.010 UG/L .01 .01 09-08-2022 36 2025/09
CA0710001_002_002 REGULATED SOC-202509 2067 HEPTACHLOR EPOXIDE < 0.010 UG/L .01 .01 09-08-2022 36 2025/09
CA0710001_002_002 REGULATED SOC-202509 2274 HEXACHLOROBENZENE < 0.500 UG/L 1 .5 09-08-2022 36 2025/09
CA0710001_002_002 REGULATED SOC-202509 2042 HEXACHLOROCYCLOPENTADIENE < 1.000 UG/L 50 1 09-08-2022 36 2025/09
CA0710001_002_002 REGULATED SOC-202509 2010 BHC-GAMMA < 0.200 UG/L .2 .2 09-08-2022 36 2025/09
CA0710001_002_002 REGULATED SOC-202509 2015 METHOXYCHLOR < 10.000 UG/L 30 10 09-08-2022 36 2025/09
CA0710001_002_002 REGULATED SOC-202503 2626 MOLINATE < 0.100 UG/L 20 2 03-15-2022 36 2025/03
CA0710001_002_002 REGULATED SOC-202509 2036 OXAMYL < 20.000 UG/L 50 20 09-08-2022 36 2025/09
CA0710001_002_002 REGULATED SOC-202509 2326 PENTACHLOROPHENOL < 0.200 UG/L 1 .2 09-08-2022 36 2025/09
CA0710001_002_002 REGULATED SOC-202509 2040 PICLORAM < 1.000 UG/L 500 1 09-08-2022 36 2025/09
CA0710001_002_002 REGULATED SOC-202509 2383 TOTAL POLYCHLORINATED BIPHENYLS (PCB) < 0.500 UG/L .5 .5 09-08-2022 36 2025/09
CA0710001_002_002 REGULATED SOC-202509 2037 SIMAZINE < 1.000 UG/L 4 1 09-08-2022 36 2025/09
CA0710001_002_002 REGULATED SOC-202606 2727 THIOBENCARB (BOLERO) < 1.000 UG/L 70 1 06-07-2023 36 2026/06
CA0710001_002_002 REGULATED SOC-202509 2020 TOXAPHENE < 1.000 UG/L 3 1 09-08-2022 36 2025/09
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.