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.:014SOURCE NAME:WELL 1-23SOURCE 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_014_014 SECONDARY/GP-202507 1928 ALKALINITY, BICARBONATE 240.000 3.000 MG/L 07-07-2022 36 2025/07
CA4110009_014_014 SECONDARY/GP-202507 1919 CALCIUM 78.000 0.100 MG/L 07-07-2022 36 2025/07
CA4110009_014_014 SECONDARY/GP-202507 1929 ALKALINITY, CARBONATE < 3.000 MG/L 07-07-2022 36 2025/07
CA4110009_014_014 SECONDARY/GP-202507 1017 CHLORIDE 100.000 1.000 MG/L 500 07-07-2022 36 2025/07
CA4110009_014_014 SECONDARY/GP-202507 1905 COLOR 5.000 5.000 UNITS 15 07-07-2022 36 2025/07
CA4110009_014_014 SECONDARY/GP-202611 1022 COPPER, FREE 1.300 1.000 UG/L 1000 50 11-01-2023 36 2026/11
CA4110009_014_014 SECONDARY/GP-202507 2905 FOAMING AGENTS (SURFACTANTS) < 0.050 MG/L .5 07-07-2022 36 2025/07
CA4110009_014_014 SECONDARY/GP-202507 1915 HARDNESS, TOTAL (AS CACO3) 340.000 0.410 MG/L 07-07-2022 36 2025/07
CA4110009_014_014 SECONDARY/GP-202507 1021 HYDROXIDE AS CALCIUM CARBONATE < 3.000 MG/L 07-07-2022 36 2025/07
CA4110009_014_014 SECONDARY/GP-202405 1028 IRON 56.000 30.000 UG/L 300 100 02-13-2024 3 2024/05 DUE NOW
CA4110009_014_014 SECONDARY/GP-202507 1031 MAGNESIUM 35.000 0.100 MG/L 07-07-2022 36 2025/07
CA4110009_014_014 SECONDARY/GP-202405 1032 MANGANESE 350.000 10.000 UG/L 50 20 02-13-2024 3 2024/05 DUE NOW
CA4110009_014_014 SECONDARY/GP-202507 1920 ODOR < 1.000 TON 3 1 07-07-2022 36 2025/07
CA4110009_014_014 GENERAL NON CHAP 15-202507 C253 PH, FIELD 7.300 pH 07-07-2022 36 2025/07
CA4110009_014_014 SECONDARY/GP-202507 1050 SILVER < 10.000 UG/L 100 10 07-07-2022 36 2025/07
CA4110009_014_014 SECONDARY/GP-202507 1052 SODIUM 75.000 1.000 MG/L 07-07-2022 36 2025/07
CA4110009_014_014 SECONDARY/GP-202507 1064 CONDUCTIVITY @ 25 C UMHOS/CM 1000.000 1.000 UMHO/CM 1600 07-07-2022 36 2025/07
CA4110009_014_014 SECONDARY/GP-202507 1055 SULFATE 110.000 1.000 MG/L 500 .5 07-07-2022 36 2025/07
CA4110009_014_014 SECONDARY/GP-202507 1930 TDS 600.000 5.000 MG/L 1000 07-07-2022 36 2025/07
CA4110009_014_014 SECONDARY/GP-202507 0100 TURBIDITY 1.500 0.100 NTU 5 .1 07-07-2022 36 2025/07
CA4110009_014_014 SECONDARY/GP-202611 1095 ZINC 5.700 1.000 UG/L 5000 50 11-01-2023 36 2026/11
CA4110009_014_014 INORGANIC-202605 1002 ALUMINUM < 50.000 UG/L 1000 50 05-09-2023 36 2026/05
CA4110009_014_014 INORGANIC-202611 1074 ANTIMONY, TOTAL < 1.000 UG/L 6 6 11-01-2023 36 2026/11
CA4110009_014_014 INORGANIC-202405 1005 ARSENIC 5.500 2.000 UG/L 10 2 02-13-2024 3 2024/05 DUE NOW
CA4110009_014_014 INORGANIC-202907 1094 ASBESTOS < 0.200 MFL 7 .2 07-21-2020 108 2029/07
CA4110009_014_014 INORGANIC-202507 1010 BARIUM 130.000 50.000 UG/L 1000 100 07-07-2022 36 2025/07
CA4110009_014_014 INORGANIC-202611 1075 BERYLLIUM, TOTAL < 1.000 UG/L 4 1 11-01-2023 36 2026/11
CA4110009_014_014 INORGANIC-202611 1015 CADMIUM < 1.000 UG/L 5 1 11-01-2023 36 2026/11
CA4110009_014_014 INORGANIC-202608 1020 CHROMIUM 2.000 1.000 UG/L 50 10 08-14-2023 36 2026/08
CA4110009_014_014 INORGANIC-202507 1024 CYANIDE < 5.000 UG/L 150 100 07-07-2022 36 2025/07
CA4110009_014_014 INORGANIC-202507 1025 FLUORIDE < 0.100 MG/L 2 .1 07-07-2022 36 2025/07
CA4110009_014_014 INORGANIC-202507 1035 MERCURY < 0.200 UG/L 2 1 07-07-2022 36 2025/07
CA4110009_014_014 INORGANIC-202611 1036 NICKEL 1.400 1.000 UG/L 100 10 11-01-2023 36 2026/11
CA4110009_014_014 INORGANIC-202507 1039 PERCHLORATE < 2.000 UG/L 6 2 07-07-2022 36 2025/07
CA4110009_014_014 INORGANIC-202611 1045 SELENIUM 1.600 1.000 UG/L 50 5 11-01-2023 36 2026/11
CA4110009_014_014 INORGANIC-202611 1085 THALLIUM, TOTAL < 1.000 UG/L 2 1 11-01-2023 36 2026/11
CA4110009_014_014 NITRATE/NITRITE-202405 1040 NITRATE 0.900 0.400 MG/L 10 .4 02-12-2024 3 2024/05 DUE NOW
CA4110009_014_014 NITRATE/NITRITE-202507 1041 NITRITE < 0.050 MG/L 1 .4 07-07-2022 36 2025/07
CA4110009_014_014 RADIOLOGICAL-203301 4109 GROSS ALPHA PARTICLE ACTIVITY < 2.290 PCI/L 15 3 01-22-2024 108 2033/01
CA4110009_014_014 RADIOLOGICAL-203301 4020 RADIUM-226 < 0.410 PCI/L 1 01-22-2024 108 2033/01
CA4110009_014_014 RADIOLOGICAL-203301 4006 COMBINED URANIUM < 0.670 PCI/L 20 1 01-22-2024 108 2033/01
CA4110009_014_014 REGULATED VOC-202405 2981 1,1,1-TRICHLOROETHANE < 0.500 UG/L 200 .5 02-26-2024 3 2024/05 DUE NOW
CA4110009_014_014 REGULATED VOC-202405 2988 1,1,2,2-TETRACHLOROETHANE < 0.500 UG/L 1 .5 02-26-2024 3 2024/05 DUE NOW
CA4110009_014_014 REGULATED VOC-202405 2985 1,1,2-TRICHLOROETHANE < 0.500 UG/L 5 .5 02-26-2024 3 2024/05 DUE NOW
CA4110009_014_014 REGULATED VOC-202405 2978 1,1-DICHLOROETHANE < 0.500 UG/L 5 .5 02-26-2024 3 2024/05 DUE NOW
CA4110009_014_014 REGULATED VOC-202405 2977 1,1-DICHLOROETHYLENE < 0.500 UG/L 6 .5 02-26-2024 3 2024/05 DUE NOW
CA4110009_014_014 REGULATED VOC-202405 2378 1,2,4-TRICHLOROBENZENE < 0.500 UG/L 5 .5 02-26-2024 3 2024/05 DUE NOW
CA4110009_014_014 REGULATED VOC-202405 2968 O-DICHLOROBENZENE < 0.500 UG/L 600 .5 02-26-2024 3 2024/05 DUE NOW
CA4110009_014_014 REGULATED VOC-202405 2980 1,2-DICHLOROETHANE < 0.500 UG/L .5 .5 02-26-2024 3 2024/05 DUE NOW
CA4110009_014_014 REGULATED VOC-202405 2983 1,2-DICHLOROPROPANE < 0.500 UG/L 5 .5 02-26-2024 3 2024/05 DUE NOW
CA4110009_014_014 REGULATED VOC-202405 2413 1,3-DICHLOROPROPENE < 0.500 UG/L .5 .5 02-26-2024 3 2024/05 DUE NOW
CA4110009_014_014 REGULATED VOC-202405 2969 P-DICHLOROBENZENE < 0.500 UG/L 5 .5 02-26-2024 3 2024/05 DUE NOW
CA4110009_014_014 REGULATED VOC-202405 2990 BENZENE < 0.500 UG/L 1 .5 02-26-2024 3 2024/05 DUE NOW
CA4110009_014_014 REGULATED VOC-202405 2982 CARBON TETRACHLORIDE < 0.500 UG/L .5 .5 02-26-2024 3 2024/05 DUE NOW
CA4110009_014_014 REGULATED VOC-202405 2380 CIS-1,2-DICHLOROETHYLENE < 0.500 UG/L 6 .5 02-26-2024 3 2024/05 DUE NOW
CA4110009_014_014 REGULATED VOC-202405 2964 DICHLOROMETHANE < 0.500 UG/L 5 .5 02-26-2024 3 2024/05 DUE NOW
CA4110009_014_014 REGULATED VOC-202405 2992 ETHYLBENZENE < 0.500 UG/L 300 .5 02-26-2024 3 2024/05 DUE NOW
CA4110009_014_014 REGULATED VOC-202405 2251 METHYL TERT-BUTYL ETHER < 0.500 UG/L 13 3 02-26-2024 3 2024/05 DUE NOW
CA4110009_014_014 REGULATED VOC-202405 2989 CHLOROBENZENE < 0.500 UG/L 70 .5 02-26-2024 3 2024/05 DUE NOW
CA4110009_014_014 REGULATED VOC-202405 2996 STYRENE < 0.500 UG/L 100 .5 02-26-2024 3 2024/05 DUE NOW
CA4110009_014_014 REGULATED VOC-202405 2987 TETRACHLOROETHYLENE < 0.500 UG/L 5 .5 02-26-2024 3 2024/05 DUE NOW
CA4110009_014_014 REGULATED VOC-202405 2991 TOLUENE < 0.500 UG/L 150 .5 02-26-2024 3 2024/05 DUE NOW
CA4110009_014_014 REGULATED VOC-202405 2979 TRANS-1,2-DICHLOROETHYLENE < 0.500 UG/L 10 .5 02-26-2024 3 2024/05 DUE NOW
CA4110009_014_014 REGULATED VOC-202405 2984 TRICHLOROETHYLENE < 0.500 UG/L 5 .5 02-26-2024 3 2024/05 DUE NOW
CA4110009_014_014 REGULATED VOC-202405 2218 TRICHLOROFLUOROMETHANE < 0.500 UG/L 150 5 02-26-2024 3 2024/05 DUE NOW
CA4110009_014_014 REGULATED VOC-202405 2904 TRICHLOROTRIFLUOROETHANE < 0.500 UG/L 1200 10 02-26-2024 3 2024/05 DUE NOW
CA4110009_014_014 REGULATED VOC-202405 2976 VINYL CHLORIDE < 0.500 UG/L .5 .5 02-26-2024 3 2024/05 DUE NOW
CA4110009_014_014 REGULATED VOC-202405 2955 XYLENES, TOTAL < 0.500 UG/L 1750 0.5 02-26-2024 3 2024/05 DUE NOW
CA4110009_014_014 REGULATED SOC-202405 2414 1,2,3-TRICHLOROPROPANE 0.003 0.002 UG/L 0.005 02-26-2024 3 2024/05 DUE NOW
CA4110009_014_014 REGULATED SOC-202410 2063 2,3,7,8-TCDD < 0.005 NG/L 0.03 0.005 01-20-2022 33 2024/10
CA4110009_014_014 REGULATED SOC-202410 2110 2,4,5-TP < 0.200 UG/L 50 1 01-20-2022 33 2024/10
CA4110009_014_014 REGULATED SOC-202410 2105 2,4-D < 0.100 UG/L 70 10 01-20-2022 33 2024/10
CA4110009_014_014 REGULATED SOC-202410 2051 LASSO (ALACHLOR) < 0.100 UG/L 2 1 01-20-2022 33 2024/10
CA4110009_014_014 REGULATED SOC-202410 2050 ATRAZINE < 0.050 UG/L 1 .5 01-20-2022 33 2024/10
CA4110009_014_014 REGULATED SOC-202410 2625 BENTAZON < 0.500 UG/L 18 2 01-20-2022 33 2024/10
CA4110009_014_014 REGULATED SOC-202410 2306 BENZO(A)PYRENE < 0.020 UG/L .2 .1 01-20-2022 33 2024/10
CA4110009_014_014 REGULATED SOC-202410 2046 CARBOFURAN < 0.500 UG/L 18 5 01-20-2022 33 2024/10
CA4110009_014_014 REGULATED SOC-202410 2959 CHLORDANE < 0.100 UG/L .1 .1 01-20-2022 33 2024/10
CA4110009_014_014 REGULATED SOC-202410 2031 DALAPON < 1.000 UG/L 200 10 01-20-2022 33 2024/10
CA4110009_014_014 REGULATED SOC-202410 2035 DI(2-ETHYLHEXYL) ADIPATE < 0.600 UG/L 400 5 01-20-2022 33 2024/10
CA4110009_014_014 REGULATED SOC-202410 2039 DI(2-ETHYLHEXYL) PHTHALATE < 0.600 UG/L 4 3 01-20-2022 33 2024/10
CA4110009_014_014 REGULATED SOC-202612 2931 1,2-DIBROMO-3-CHLOROPROPANE < 0.010 UG/L .2 .01 03-13-2024 33 2026/12
CA4110009_014_014 REGULATED SOC-202410 2041 DINOSEB < 0.200 UG/L 7 2 01-20-2022 33 2024/10
CA4110009_014_014 REGULATED SOC-202410 2032 DIQUAT < 0.400 UG/L 20 4 01-20-2022 33 2024/10
CA4110009_014_014 REGULATED SOC-202410 2033 ENDOTHALL < 20.000 UG/L 100 45 01-20-2022 33 2024/10
CA4110009_014_014 REGULATED SOC-202410 2005 ENDRIN < 0.100 UG/L 2 .1 01-20-2022 33 2024/10
CA4110009_014_014 REGULATED SOC-202612 2946 ETHYLENE DIBROMIDE < 0.020 UG/L .05 .02 03-13-2024 33 2026/12
CA4110009_014_014 REGULATED SOC-202410 2034 GLYPHOSATE < 6.000 UG/L 700 25 01-20-2022 33 2024/10
CA4110009_014_014 REGULATED SOC-202410 2065 HEPTACHLOR < 0.010 UG/L .01 .01 01-20-2022 33 2024/10
CA4110009_014_014 REGULATED SOC-202410 2067 HEPTACHLOR EPOXIDE < 0.010 UG/L .01 .01 01-20-2022 33 2024/10
CA4110009_014_014 REGULATED SOC-202410 2274 HEXACHLOROBENZENE < 0.050 UG/L 1 .5 01-20-2022 33 2024/10
CA4110009_014_014 REGULATED SOC-202410 2042 HEXACHLOROCYCLOPENTADIENE < 0.050 UG/L 50 1 01-20-2022 33 2024/10
CA4110009_014_014 REGULATED SOC-202410 2010 BHC-GAMMA < 0.040 UG/L .2 .2 01-20-2022 33 2024/10
CA4110009_014_014 REGULATED SOC-202410 2015 METHOXYCHLOR < 0.100 UG/L 30 10 01-20-2022 33 2024/10
CA4110009_014_014 REGULATED SOC-202410 2626 MOLINATE < 0.100 UG/L 20 2 01-20-2022 33 2024/10
CA4110009_014_014 REGULATED SOC-202410 2036 OXAMYL < 0.500 UG/L 50 20 01-20-2022 33 2024/10
CA4110009_014_014 REGULATED SOC-202410 2326 PENTACHLOROPHENOL < 0.040 UG/L 1 .2 01-20-2022 33 2024/10
CA4110009_014_014 REGULATED SOC-202410 2040 PICLORAM < 0.100 UG/L 500 1 01-20-2022 33 2024/10
CA4110009_014_014 REGULATED SOC-202410 2383 TOTAL POLYCHLORINATED BIPHENYLS (PCB) < 0.100 UG/L .5 .5 01-20-2022 33 2024/10
CA4110009_014_014 REGULATED SOC-202410 2037 SIMAZINE < 0.050 UG/L 4 1 01-20-2022 33 2024/10
CA4110009_014_014 REGULATED SOC-202410 2727 THIOBENCARB (BOLERO) < 0.200 UG/L 70 1 01-20-2022 33 2024/10
CA4110009_014_014 REGULATED SOC-202410 2020 TOXAPHENE < 0.500 UG/L 3 1 01-20-2022 33 2024/10
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.