Date:05-18-2024STATE OF CALIFORNIA 
LAST AND NEXT SAMPLE REPORT
SYSTEM NO.:4110009SYSTEM NAME:CALIFORNIA WATER SERVICE-S SAN FRANCISCOCOUNTY:SAN MATEO 
SOURCE NO.:013SOURCE NAME:WELL 01-22SOURCE 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
CA4110009_013_013 SECONDARY/GP-202508 1928 ALKALINITY, BICARBONATE 240.000 3.000 MG/L 08-11-2022 36 2025/08
CA4110009_013_013 SECONDARY/GP-202508 1919 CALCIUM 92.000 0.100 MG/L 08-11-2022 36 2025/08
CA4110009_013_013 SECONDARY/GP-202508 1929 ALKALINITY, CARBONATE < 3.000 MG/L 08-11-2022 36 2025/08
CA4110009_013_013 SECONDARY/GP-202508 1017 CHLORIDE 140.000 1.000 MG/L 500 08-11-2022 36 2025/08
CA4110009_013_013 SECONDARY/GP-202508 1905 COLOR 5.000 5.000 UNITS 15 08-11-2022 36 2025/08
CA4110009_013_013 SECONDARY/GP-202611 1022 COPPER, FREE 2.000 1.000 UG/L 1000 50 11-01-2023 36 2026/11
CA4110009_013_013 SECONDARY/GP-202508 2905 FOAMING AGENTS (SURFACTANTS) < 0.050 MG/L .5 08-11-2022 36 2025/08
CA4110009_013_013 SECONDARY/GP-202508 1915 HARDNESS, TOTAL (AS CACO3) 380.000 0.410 MG/L 08-11-2022 36 2025/08
CA4110009_013_013 SECONDARY/GP-202508 1021 HYDROXIDE AS CALCIUM CARBONATE < 3.000 MG/L 08-11-2022 36 2025/08
CA4110009_013_013 SECONDARY/GP-202405 1028 IRON 30.000 30.000 UG/L 300 100 02-13-2024 3 2024/05 DUE NOW
CA4110009_013_013 SECONDARY/GP-202508 1031 MAGNESIUM 36.000 0.100 MG/L 08-11-2022 36 2025/08
CA4110009_013_013 SECONDARY/GP-202405 1032 MANGANESE 400.000 10.000 UG/L 50 20 02-13-2024 3 2024/05 DUE NOW
CA4110009_013_013 SECONDARY/GP-202508 1920 ODOR < 1.000 TON 3 1 08-11-2022 36 2025/08
CA4110009_013_013 GENERAL NON CHAP 15-202508 C253 PH, FIELD 7.300 pH 08-11-2022 36 2025/08
CA4110009_013_013 SECONDARY/GP-202508 1050 SILVER < 10.000 UG/L 100 10 08-11-2022 36 2025/08
CA4110009_013_013 SECONDARY/GP-202508 1052 SODIUM 89.000 1.000 MG/L 08-11-2022 36 2025/08
CA4110009_013_013 SECONDARY/GP-202508 1064 CONDUCTIVITY @ 25 C UMHOS/CM 1200.000 1.000 UMHO/CM 1600 08-11-2022 36 2025/08
CA4110009_013_013 SECONDARY/GP-202508 1055 SULFATE 160.000 1.000 MG/L 500 .5 08-11-2022 36 2025/08
CA4110009_013_013 SECONDARY/GP-202508 1930 TDS 600.000 5.000 MG/L 1000 08-11-2022 36 2025/08
CA4110009_013_013 SECONDARY/GP-202508 0100 TURBIDITY 0.850 0.100 NTU 5 .1 08-11-2022 36 2025/08
CA4110009_013_013 SECONDARY/GP-202611 1095 ZINC 3.300 1.000 UG/L 5000 50 11-01-2023 36 2026/11
CA4110009_013_013 INORGANIC-202605 1002 ALUMINUM < 50.000 UG/L 1000 50 05-09-2023 36 2026/05
CA4110009_013_013 INORGANIC-202611 1074 ANTIMONY, TOTAL < 1.000 UG/L 6 6 11-01-2023 36 2026/11
CA4110009_013_013 INORGANIC-202405 1005 ARSENIC 2.600 2.000 UG/L 10 2 02-13-2024 3 2024/05 DUE NOW
CA4110009_013_013 INORGANIC-202808 1094 ASBESTOS < 0.200 MFL 7 .2 08-08-2019 108 2028/08
CA4110009_013_013 INORGANIC-202508 1010 BARIUM 130.000 50.000 UG/L 1000 100 08-11-2022 36 2025/08
CA4110009_013_013 INORGANIC-202611 1075 BERYLLIUM, TOTAL < 1.000 UG/L 4 1 11-01-2023 36 2026/11
CA4110009_013_013 INORGANIC-202611 1015 CADMIUM < 1.000 UG/L 5 1 11-01-2023 36 2026/11
CA4110009_013_013 INORGANIC-202608 1020 CHROMIUM 2.300 1.000 UG/L 50 10 08-14-2023 36 2026/08
CA4110009_013_013 INORGANIC-202508 1024 CYANIDE < 5.000 UG/L 150 100 08-11-2022 36 2025/08
CA4110009_013_013 INORGANIC-202508 1025 FLUORIDE < 0.100 MG/L 2 .1 08-11-2022 36 2025/08
CA4110009_013_013 INORGANIC-202508 1035 MERCURY < 0.200 UG/L 2 1 08-11-2022 36 2025/08
CA4110009_013_013 INORGANIC-202611 1036 NICKEL 1.500 1.000 UG/L 100 10 11-01-2023 36 2026/11
CA4110009_013_013 INORGANIC-202508 1039 PERCHLORATE < 2.000 UG/L 6 2 08-11-2022 36 2025/08
CA4110009_013_013 INORGANIC-202611 1045 SELENIUM 1.300 1.000 UG/L 50 5 11-01-2023 36 2026/11
CA4110009_013_013 INORGANIC-202611 1085 THALLIUM, TOTAL < 1.000 UG/L 2 1 11-01-2023 36 2026/11
CA4110009_013_013 NITRATE/NITRITE-202407 1040 NITRATE 0.800 0.400 MG/L 10 .4 04-11-2024 3 2024/07
CA4110009_013_013 NITRATE/NITRITE-202508 1041 NITRITE < 0.050 MG/L 1 .4 08-11-2022 36 2025/08
CA4110009_013_013 RADIOLOGICAL-203101 4109 GROSS ALPHA PARTICLE ACTIVITY < 3.000 PCI/L 15 3 01-20-2022 108 2031/01
CA4110009_013_013 REGULATED VOC-202502 2981 1,1,1-TRICHLOROETHANE < 0.500 UG/L 200 .5 02-26-2024 12 2025/02
CA4110009_013_013 REGULATED VOC-202502 2988 1,1,2,2-TETRACHLOROETHANE < 0.500 UG/L 1 .5 02-26-2024 12 2025/02
CA4110009_013_013 REGULATED VOC-202502 2985 1,1,2-TRICHLOROETHANE < 0.500 UG/L 5 .5 02-26-2024 12 2025/02
CA4110009_013_013 REGULATED VOC-202502 2978 1,1-DICHLOROETHANE < 0.500 UG/L 5 .5 02-26-2024 12 2025/02
CA4110009_013_013 REGULATED VOC-202502 2977 1,1-DICHLOROETHYLENE < 0.500 UG/L 6 .5 02-26-2024 12 2025/02
CA4110009_013_013 REGULATED VOC-202502 2378 1,2,4-TRICHLOROBENZENE < 0.500 UG/L 5 .5 02-26-2024 12 2025/02
CA4110009_013_013 REGULATED VOC-202502 2968 O-DICHLOROBENZENE < 0.500 UG/L 600 .5 02-26-2024 12 2025/02
CA4110009_013_013 REGULATED VOC-202502 2980 1,2-DICHLOROETHANE < 0.500 UG/L .5 .5 02-26-2024 12 2025/02
CA4110009_013_013 REGULATED VOC-202502 2983 1,2-DICHLOROPROPANE < 0.500 UG/L 5 .5 02-26-2024 12 2025/02
CA4110009_013_013 REGULATED VOC-202502 2413 1,3-DICHLOROPROPENE < 0.500 UG/L .5 .5 02-26-2024 12 2025/02
CA4110009_013_013 REGULATED VOC-202502 2969 P-DICHLOROBENZENE < 0.500 UG/L 5 .5 02-26-2024 12 2025/02
CA4110009_013_013 REGULATED VOC-202502 2990 BENZENE < 0.500 UG/L 1 .5 02-26-2024 12 2025/02
CA4110009_013_013 REGULATED VOC-202502 2982 CARBON TETRACHLORIDE < 0.500 UG/L .5 .5 02-26-2024 12 2025/02
CA4110009_013_013 REGULATED VOC-202502 2380 CIS-1,2-DICHLOROETHYLENE < 0.500 UG/L 6 .5 02-26-2024 12 2025/02
CA4110009_013_013 REGULATED VOC-202502 2964 DICHLOROMETHANE < 0.500 UG/L 5 .5 02-26-2024 12 2025/02
CA4110009_013_013 REGULATED VOC-202502 2992 ETHYLBENZENE < 0.500 UG/L 300 .5 02-26-2024 12 2025/02
CA4110009_013_013 REGULATED VOC-202405 2251 METHYL TERT-BUTYL ETHER < 0.500 UG/L 13 3 02-26-2024 3 2024/05 DUE NOW
CA4110009_013_013 REGULATED VOC-202502 2989 CHLOROBENZENE < 0.500 UG/L 70 .5 02-26-2024 12 2025/02
CA4110009_013_013 REGULATED VOC-202502 2996 STYRENE < 0.500 UG/L 100 .5 02-26-2024 12 2025/02
CA4110009_013_013 REGULATED VOC-202502 2987 TETRACHLOROETHYLENE < 0.500 UG/L 5 .5 02-26-2024 12 2025/02
CA4110009_013_013 REGULATED VOC-202502 2991 TOLUENE < 0.500 UG/L 150 .5 02-26-2024 12 2025/02
CA4110009_013_013 REGULATED VOC-202502 2979 TRANS-1,2-DICHLOROETHYLENE < 0.500 UG/L 10 .5 02-26-2024 12 2025/02
CA4110009_013_013 REGULATED VOC-202502 2984 TRICHLOROETHYLENE < 0.500 UG/L 5 .5 02-26-2024 12 2025/02
CA4110009_013_013 REGULATED VOC-202502 2218 TRICHLOROFLUOROMETHANE < 0.500 UG/L 150 5 02-26-2024 12 2025/02
CA4110009_013_013 REGULATED VOC-202502 2904 TRICHLOROTRIFLUOROETHANE < 0.500 UG/L 1200 10 02-26-2024 12 2025/02
CA4110009_013_013 REGULATED VOC-202502 2976 VINYL CHLORIDE < 0.500 UG/L .5 .5 02-26-2024 12 2025/02
CA4110009_013_013 REGULATED VOC-202502 2955 XYLENES, TOTAL < 0.500 UG/L 1750 0.5 02-26-2024 12 2025/02
CA4110009_013_013 REGULATED SOC-202405 2414 1,2,3-TRICHLOROPROPANE < 0.002 UG/L 0.005 02-26-2024 3 2024/05 DUE NOW
CA4110009_013_013 REGULATED SOC-202608 2063 2,3,7,8-TCDD < 0.005 NG/L 0.03 0.005 11-08-2023 33 2026/08
CA4110009_013_013 REGULATED SOC-202608 2110 2,4,5-TP < 1.000 UG/L 50 1 11-08-2023 33 2026/08
CA4110009_013_013 REGULATED SOC-202608 2105 2,4-D < 10.000 UG/L 70 10 11-08-2023 33 2026/08
CA4110009_013_013 REGULATED SOC-202608 2051 LASSO (ALACHLOR) < 1.000 UG/L 2 1 11-08-2023 33 2026/08
CA4110009_013_013 REGULATED SOC-202608 2050 ATRAZINE < 0.500 UG/L 1 .5 11-08-2023 33 2026/08
CA4110009_013_013 REGULATED SOC-202608 2625 BENTAZON < 2.000 UG/L 18 2 11-08-2023 33 2026/08
CA4110009_013_013 REGULATED SOC-202608 2306 BENZO(A)PYRENE < 0.100 UG/L .2 .1 11-08-2023 33 2026/08
CA4110009_013_013 REGULATED SOC-202608 2046 CARBOFURAN < 5.000 UG/L 18 5 11-08-2023 33 2026/08
CA4110009_013_013 REGULATED SOC-202608 2959 CHLORDANE < 0.100 UG/L .1 .1 11-08-2023 33 2026/08
CA4110009_013_013 REGULATED SOC-202608 2031 DALAPON < 10.000 UG/L 200 10 11-08-2023 33 2026/08
CA4110009_013_013 REGULATED SOC-202608 2035 DI(2-ETHYLHEXYL) ADIPATE < 5.000 UG/L 400 5 11-08-2023 33 2026/08
CA4110009_013_013 REGULATED SOC-202608 2039 DI(2-ETHYLHEXYL) PHTHALATE < 3.000 UG/L 4 3 11-08-2023 33 2026/08
CA4110009_013_013 REGULATED SOC-202612 2931 1,2-DIBROMO-3-CHLOROPROPANE < 0.010 UG/L .2 .01 03-13-2024 33 2026/12
CA4110009_013_013 REGULATED SOC-202608 2041 DINOSEB < 2.000 UG/L 7 2 11-08-2023 33 2026/08
CA4110009_013_013 REGULATED SOC-202608 2032 DIQUAT < 4.000 UG/L 20 4 11-08-2023 33 2026/08
CA4110009_013_013 REGULATED SOC-202608 2033 ENDOTHALL < 45.000 UG/L 100 45 11-08-2023 33 2026/08
CA4110009_013_013 REGULATED SOC-202608 2005 ENDRIN < 0.100 UG/L 2 .1 11-08-2023 33 2026/08
CA4110009_013_013 REGULATED SOC-202612 2946 ETHYLENE DIBROMIDE < 0.020 UG/L .05 .02 03-13-2024 33 2026/12
CA4110009_013_013 REGULATED SOC-202608 2034 GLYPHOSATE < 25.000 UG/L 700 25 11-08-2023 33 2026/08
CA4110009_013_013 REGULATED SOC-202608 2065 HEPTACHLOR < 0.010 UG/L .01 .01 11-08-2023 33 2026/08
CA4110009_013_013 REGULATED SOC-202608 2067 HEPTACHLOR EPOXIDE < 0.010 UG/L .01 .01 11-08-2023 33 2026/08
CA4110009_013_013 REGULATED SOC-202608 2274 HEXACHLOROBENZENE < 0.500 UG/L 1 .5 11-08-2023 33 2026/08
CA4110009_013_013 REGULATED SOC-202608 2042 HEXACHLOROCYCLOPENTADIENE < 1.000 UG/L 50 1 11-08-2023 33 2026/08
CA4110009_013_013 REGULATED SOC-202608 2010 BHC-GAMMA < 0.200 UG/L .2 .2 11-08-2023 33 2026/08
CA4110009_013_013 REGULATED SOC-202608 2015 METHOXYCHLOR < 10.000 UG/L 30 10 11-08-2023 33 2026/08
CA4110009_013_013 REGULATED SOC-202608 2626 MOLINATE < 2.000 UG/L 20 2 11-08-2023 33 2026/08
CA4110009_013_013 REGULATED SOC-202608 2036 OXAMYL < 20.000 UG/L 50 20 11-08-2023 33 2026/08
CA4110009_013_013 REGULATED SOC-202608 2326 PENTACHLOROPHENOL < 0.200 UG/L 1 .2 11-08-2023 33 2026/08
CA4110009_013_013 REGULATED SOC-202608 2040 PICLORAM < 1.000 UG/L 500 1 11-08-2023 33 2026/08
CA4110009_013_013 REGULATED SOC-202608 2383 TOTAL POLYCHLORINATED BIPHENYLS (PCB) < 0.500 UG/L .5 .5 11-08-2023 33 2026/08
CA4110009_013_013 REGULATED SOC-202608 2037 SIMAZINE < 1.000 UG/L 4 1 11-08-2023 33 2026/08
CA4110009_013_013 REGULATED SOC-202608 2727 THIOBENCARB (BOLERO) < 1.000 UG/L 70 1 11-08-2023 33 2026/08
CA4110009_013_013 REGULATED SOC-202608 2020 TOXAPHENE < 1.000 UG/L 3 1 11-08-2023 33 2026/08
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.