Date:05-18-2024STATE OF CALIFORNIA 
LAST AND NEXT SAMPLE REPORT
SYSTEM NO.:4010016SYSTEM NAME:LOS OSOS COMMUNITY SERVICES DISTRICTCOUNTY:SAN LUIS OBISPO 
SOURCE NO.:016SOURCE NAME:SOUTH BAY UPPER AQUIFER WELLSOURCE CLASS:LARGSTATUS: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
CA4010016_016_016 SECONDARY/GP-202605 1994 AGGRESSIVE INDEX 11.000 AGGR 05-01-2023 36 2026/05
CA4010016_016_016 SECONDARY/GP-202605 1928 ALKALINITY, BICARBONATE 120.000 1.000 MG/L 05-01-2023 36 2026/05
CA4010016_016_016 SECONDARY/GP-202702 1919 CALCIUM 24.000 1.000 MG/L 02-26-2024 36 2027/02
CA4010016_016_016 SECONDARY/GP-202605 1929 ALKALINITY, CARBONATE < 1.000 MG/L 05-01-2023 36 2026/05
CA4010016_016_016 SECONDARY/GP-202605 1017 CHLORIDE 60.000 1.000 MG/L 500 05-01-2023 36 2026/05
CA4010016_016_016 SECONDARY/GP-202605 1905 COLOR 1.000 1.000 UNITS 15 05-01-2023 36 2026/05
CA4010016_016_016 SECONDARY/GP-202605 1022 COPPER, FREE < 20.000 UG/L 1000 50 05-01-2023 36 2026/05
CA4010016_016_016 SECONDARY/GP-202605 2905 FOAMING AGENTS (SURFACTANTS) < 0.100 MG/L .5 05-01-2023 36 2026/05
CA4010016_016_016 SECONDARY/GP-202605 1915 HARDNESS, TOTAL (AS CACO3) 160.000 1.000 MG/L 05-01-2023 36 2026/05
CA4010016_016_016 SECONDARY/GP-202605 1021 HYDROXIDE AS CALCIUM CARBONATE < 1.000 MG/L 05-01-2023 36 2026/05
CA4010016_016_016 SECONDARY/GP-202703 1028 IRON 16.000 10.000 UG/L 300 100 03-04-2024 36 2027/03
CA4010016_016_016 SECONDARY/GP-202605 1031 MAGNESIUM 25.000 1.000 MG/L 05-01-2023 36 2026/05
CA4010016_016_016 SECONDARY/GP-202703 1032 MANGANESE < 2.000 UG/L 50 20 03-04-2024 36 2027/03
CA4010016_016_016 SECONDARY/GP-202605 1920 ODOR 1.000 1.000 TON 3 1 05-01-2023 36 2026/05
CA4010016_016_016 SECONDARY/GP-202605 1925 PH 7.160 pH 05-01-2023 36 2026/05
CA4010016_016_016 SECONDARY/GP-202605 1050 SILVER < 10.000 UG/L 100 10 05-01-2023 36 2026/05
CA4010016_016_016 SECONDARY/GP-202605 1052 SODIUM 43.000 1.000 MG/L 05-01-2023 36 2026/05
CA4010016_016_016 SECONDARY/GP-202702 1064 CONDUCTIVITY @ 25 C UMHOS/CM 520.000 10.000 UMHO/CM 1600 02-26-2024 36 2027/02
CA4010016_016_016 SECONDARY/GP-202605 1055 SULFATE 23.000 0.500 MG/L 500 .5 05-01-2023 36 2026/05
CA4010016_016_016 SECONDARY/GP-202605 1930 TDS 350.000 1.000 MG/L 1000 05-01-2023 36 2026/05
CA4010016_016_016 SECONDARY/GP-202605 0100 TURBIDITY 0.280 0.030 NTU 5 .1 05-01-2023 36 2026/05
CA4010016_016_016 SECONDARY/GP-202605 1095 ZINC < 25.000 UG/L 5000 50 05-01-2023 36 2026/05
CA4010016_016_016 INORGANIC-202511 1002 ALUMINUM < 20.000 UG/L 1000 50 11-07-2022 36 2025/11
CA4010016_016_016 INORGANIC-202511 1074 ANTIMONY, TOTAL < 6.000 UG/L 6 6 11-07-2022 36 2025/11
CA4010016_016_016 INORGANIC-202511 1005 ARSENIC < 2.000 UG/L 10 2 11-07-2022 36 2025/11
CA4010016_016_016 INORGANIC-202511 1010 BARIUM 93.000 10.000 UG/L 1000 100 11-07-2022 36 2025/11
CA4010016_016_016 INORGANIC-202511 1075 BERYLLIUM, TOTAL < 1.000 UG/L 4 1 11-07-2022 36 2025/11
CA4010016_016_016 INORGANIC-202511 1015 CADMIUM < 1.000 UG/L 5 1 11-07-2022 36 2025/11
CA4010016_016_016 INORGANIC-202511 1020 CHROMIUM < 10.000 UG/L 50 10 11-07-2022 36 2025/11
CA4010016_016_016 INORGANIC-202605 1025 FLUORIDE < 0.100 MG/L 2 .1 05-01-2023 36 2026/05
CA4010016_016_016 INORGANIC-202511 1030 LEAD < 5.000 UG/L 5 11-07-2022 36 2025/11
CA4010016_016_016 INORGANIC-202511 1035 MERCURY < 1.000 UG/L 2 1 11-07-2022 36 2025/11
CA4010016_016_016 INORGANIC-202511 1036 NICKEL < 10.000 UG/L 100 10 11-07-2022 36 2025/11
CA4010016_016_016 INORGANIC-202505 1039 PERCHLORATE < 2.000 UG/L 6 2 05-02-2022 36 2025/05
CA4010016_016_016 INORGANIC-202511 1045 SELENIUM < 5.000 UG/L 50 5 11-07-2022 36 2025/11
CA4010016_016_016 INORGANIC-202511 1085 THALLIUM, TOTAL < 1.000 UG/L 2 1 11-07-2022 36 2025/11
CA4010016_016_016 NITRATE/NITRITE-202404 1040 NITRATE 14.000 0.400 MG/L 10 .4 03-04-2024 1 2024/04 DUE NOW
CA4010016_016_016 NITRATE/NITRITE-202605 1041 NITRITE < 0.400 MG/L 1 .4 05-01-2023 36 2026/05
CA4010016_016_016 RADIOLOGICAL-202505 4109 GROSS ALPHA PARTICLE ACTIVITY < 0.909 PCI/L 15 3 05-02-2022 36 2025/05
CA4010016_016_016 REGULATED VOC-202509 2981 1,1,1-TRICHLOROETHANE < 0.500 UG/L 200 .5 09-06-2022 36 2025/09
CA4010016_016_016 REGULATED VOC-202509 2988 1,1,2,2-TETRACHLOROETHANE < 0.500 UG/L 1 .5 09-06-2022 36 2025/09
CA4010016_016_016 REGULATED VOC-202509 2985 1,1,2-TRICHLOROETHANE < 0.500 UG/L 5 .5 09-06-2022 36 2025/09
CA4010016_016_016 REGULATED VOC-202509 2978 1,1-DICHLOROETHANE < 0.500 UG/L 5 .5 09-06-2022 36 2025/09
CA4010016_016_016 REGULATED VOC-202509 2977 1,1-DICHLOROETHYLENE < 0.500 UG/L 6 .5 09-06-2022 36 2025/09
CA4010016_016_016 REGULATED VOC-202509 2378 1,2,4-TRICHLOROBENZENE < 0.500 UG/L 5 .5 09-06-2022 36 2025/09
CA4010016_016_016 REGULATED VOC-202509 2968 O-DICHLOROBENZENE < 0.500 UG/L 600 .5 09-06-2022 36 2025/09
CA4010016_016_016 REGULATED VOC-202509 2980 1,2-DICHLOROETHANE < 0.500 UG/L .5 .5 09-06-2022 36 2025/09
CA4010016_016_016 REGULATED VOC-202509 2983 1,2-DICHLOROPROPANE < 0.500 UG/L 5 .5 09-06-2022 36 2025/09
CA4010016_016_016 REGULATED VOC-202509 2413 1,3-DICHLOROPROPENE < 0.500 UG/L .5 .5 09-06-2022 36 2025/09
CA4010016_016_016 REGULATED VOC-202509 2969 P-DICHLOROBENZENE < 0.500 UG/L 5 .5 09-06-2022 36 2025/09
CA4010016_016_016 REGULATED VOC-202509 2990 BENZENE < 0.500 UG/L 1 .5 09-06-2022 36 2025/09
CA4010016_016_016 REGULATED VOC-202509 2982 CARBON TETRACHLORIDE < 0.500 UG/L .5 .5 09-06-2022 36 2025/09
CA4010016_016_016 REGULATED VOC-202509 2380 CIS-1,2-DICHLOROETHYLENE < 0.500 UG/L 6 .5 09-06-2022 36 2025/09
CA4010016_016_016 REGULATED VOC-202509 2964 DICHLOROMETHANE < 0.500 UG/L 5 .5 09-06-2022 36 2025/09
CA4010016_016_016 REGULATED VOC-202509 2992 ETHYLBENZENE < 0.500 UG/L 300 .5 09-06-2022 36 2025/09
CA4010016_016_016 REGULATED VOC-202509 2251 METHYL TERT-BUTYL ETHER < 3.000 UG/L 13 3 09-06-2022 36 2025/09
CA4010016_016_016 REGULATED VOC-202509 2989 CHLOROBENZENE < 0.500 UG/L 70 .5 09-06-2022 36 2025/09
CA4010016_016_016 REGULATED VOC-202509 2996 STYRENE < 0.500 UG/L 100 .5 09-06-2022 36 2025/09
CA4010016_016_016 REGULATED VOC-202509 2987 TETRACHLOROETHYLENE < 0.500 UG/L 5 .5 09-06-2022 36 2025/09
CA4010016_016_016 REGULATED VOC-202509 2991 TOLUENE < 0.500 UG/L 150 .5 09-06-2022 36 2025/09
CA4010016_016_016 REGULATED VOC-202509 2979 TRANS-1,2-DICHLOROETHYLENE < 0.500 UG/L 10 .5 09-06-2022 36 2025/09
CA4010016_016_016 REGULATED VOC-202509 2984 TRICHLOROETHYLENE < 0.500 UG/L 5 .5 09-06-2022 36 2025/09
CA4010016_016_016 REGULATED VOC-202509 2218 TRICHLOROFLUOROMETHANE < 5.000 UG/L 150 5 09-06-2022 36 2025/09
CA4010016_016_016 REGULATED VOC-202509 2904 TRICHLOROTRIFLUOROETHANE < 10.000 UG/L 1200 10 09-06-2022 36 2025/09
CA4010016_016_016 REGULATED VOC-202509 2976 VINYL CHLORIDE < 0.500 UG/L .5 .5 09-06-2022 36 2025/09
CA4010016_016_016 REGULATED VOC-202509 2955 XYLENES, TOTAL < 0.500 UG/L 1750 0.5 09-06-2022 36 2025/09
CA4010016_016_016 REGULATED SOC-202202 2414 1,2,3-TRICHLOROPROPANE < UG/L 0.005 02-04-2019 36 2022/02 DUE NOW
CA4010016_016_016 REGULATED SOC-203206 2050 ATRAZINE < 0.500 UG/L 1 .5 06-29-2023 108 2032/06
CA4010016_016_016 REGULATED SOC-203206 2037 SIMAZINE < 1.000 UG/L 4 1 06-29-2023 108 2032/06
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.