Date:07-16-2026STATE OF CALIFORNIA 
LAST AND NEXT SAMPLE REPORT
SYSTEM NO.:1910142SYSTEM NAME:GSWC-SAN DIMASCOUNTY:LOS ANGELES 
SOURCE NO.:051SOURCE NAME:HIGHWAY WELL 02SOURCE CLASS:LGLBSTATUS: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
CA1910142_051_051 SECONDARY/GP 1928 ALKALINITY, BICARBONATE 270.000 6.100 MG/L 12-19-2022 36 2025/12 DUE NOW
CA1910142_051_051 SECONDARY/GP 1919 CALCIUM 77.700 0.500 MG/L 12-19-2022 36 2025/12 DUE NOW
CA1910142_051_051 SECONDARY/GP 1929 ALKALINITY, CARBONATE 5.500 5.000 MG/L 12-19-2022 36 2025/12 DUE NOW
CA1910142_051_051 SECONDARY/GP 1017 CHLORIDE 58.000 0.500 MG/L 500 12-19-2022 36 2025/12 DUE NOW
CA1910142_051_051 SECONDARY/GP 1905 COLOR < 3.000 UNITS 15 12-19-2022 36 2025/12 DUE NOW
CA1910142_051_051 SECONDARY/GP 1022 COPPER, FREE 5.000 1.000 UG/L 1000 50 12-19-2022 36 2025/12 DUE NOW
CA1910142_051_051 SECONDARY/GP 2905 FOAMING AGENTS (SURFACTANTS) < 0.050 MG/L .5 12-19-2022 36 2025/12 DUE NOW
CA1910142_051_051 SECONDARY/GP 1915 HARDNESS, TOTAL (AS CACO3) 307.000 3.310 MG/L 12-19-2022 36 2025/12 DUE NOW
CA1910142_051_051 SECONDARY/GP 1021 HYDROXIDE AS CALCIUM CARBONATE < 5.000 MG/L 12-19-2022 36 2025/12 DUE NOW
CA1910142_051_051 SECONDARY/GP 1028 IRON < 30.000 UG/L 300 12-19-2022 36 2025/12 DUE NOW
CA1910142_051_051 SECONDARY/GP 1031 MAGNESIUM 27.500 0.500 MG/L 12-19-2022 36 2025/12 DUE NOW
CA1910142_051_051 SECONDARY/GP 1032 MANGANESE 4.300 1.000 UG/L 50 12-19-2022 36 2025/12 DUE NOW
CA1910142_051_051 SECONDARY/GP 1920 ODOR < 1.000 TON 3 12-19-2022 36 2025/12 DUE NOW
CA1910142_051_051 SECONDARY/GP 1925 PH 7.480 0.100 pH 12-19-2022 36 2025/12 DUE NOW
CA1910142_051_051 SECONDARY/GP 1050 SILVER < 0.200 UG/L 100 03-18-2026 36 2029/03
CA1910142_051_051 SECONDARY/GP 1052 SODIUM 44.000 1.000 MG/L 12-19-2022 36 2025/12 DUE NOW
CA1910142_051_051 SECONDARY/GP 1064 CONDUCTIVITY @ 25 C UMHOS/CM 760.000 2.000 UMHO/CM 1600 12-19-2022 36 2025/12 DUE NOW
CA1910142_051_051 SECONDARY/GP 1055 SULFATE 130.000 0.500 MG/L 500 12-19-2022 36 2025/12 DUE NOW
CA1910142_051_051 SECONDARY/GP 1930 TDS 340.000 10.000 MG/L 1000 08-22-2024 36 2027/08
CA1910142_051_051 SECONDARY/GP 0100 TURBIDITY 0.100 0.100 NTU 5 12-19-2022 36 2025/12 DUE NOW
CA1910142_051_051 SECONDARY/GP 1095 ZINC 11.000 10.000 UG/L 5000 12-19-2022 36 2025/12 DUE NOW
CA1910142_051_051 INORGANIC 1002 ALUMINUM < 50.000 UG/L 1000 50 03-18-2026 36 2029/03
CA1910142_051_051 INORGANIC 1074 ANTIMONY, TOTAL < 6.000 UG/L 6 6 03-18-2026 36 2029/03
CA1910142_051_051 INORGANIC 1005 ARSENIC < 2.000 UG/L 10 2 03-18-2026 36 2029/03
CA1910142_051_051 INORGANIC 1010 BARIUM < 100.000 UG/L 1000 100 03-18-2026 36 2029/03
CA1910142_051_051 INORGANIC 1075 BERYLLIUM, TOTAL < 1.000 UG/L 4 1 03-18-2026 36 2029/03
CA1910142_051_051 INORGANIC 1015 CADMIUM < 1.000 UG/L 5 1 03-18-2026 36 2029/03
CA1910142_051_051 INORGANIC 1020 CHROMIUM < 10.000 UG/L 50 10 03-18-2026 36 2029/03
CA1910142_051_051 INORGANIC 1080 CHROMIUM, HEX 0.330 0.020 UG/L 10 .1 03-18-2026 36 2029/03
CA1910142_051_051 INORGANIC 1024 CYANIDE < 100.000 UG/L 150 100 03-18-2026 36 2029/03
CA1910142_051_051 INORGANIC 1025 FLUORIDE 0.550 0.100 MG/L 2 .1 03-18-2026 36 2029/03
CA1910142_051_051 INORGANIC 1035 MERCURY < 1.000 UG/L 2 1 03-18-2026 36 2029/03
CA1910142_051_051 INORGANIC 1036 NICKEL < 10.000 UG/L 100 10 03-18-2026 36 2029/03
CA1910142_051_051 INORGANIC 1039 PERCHLORATE < 1.000 UG/L 6 1 05-19-2026 3 2026/08
CA1910142_051_051 INORGANIC 1045 SELENIUM < 5.000 UG/L 50 5 03-18-2026 36 2029/03
CA1910142_051_051 INORGANIC 1085 THALLIUM, TOTAL < 1.000 UG/L 2 1 03-18-2026 36 2029/03
CA1910142_051_051 NITRATE/NITRITE 1040 NITRATE 1.800 0.400 MG/L 10 .4 05-19-2026 3 2026/08
CA1910142_051_051 NITRATE/NITRITE 1038 NITRATE-NITRITE 2.400 0.400 MG/L 10 .4 03-18-2026 36 2029/03
CA1910142_051_051 NITRATE/NITRITE 1041 NITRITE < 0.400 MG/L 1 .4 03-18-2026 36 2029/03
CA1910142_051_051 PER- AND POLY-FLUOROALKYL SUBSTANCES 2813 11CL-PF3OUDS < 1.700 NG/L 05-19-2026 3 2026/08
CA1910142_051_051 PER- AND POLY-FLUOROALKYL SUBSTANCES 2815 ADONA < 1.700 NG/L 05-19-2026 3 2026/08
CA1910142_051_051 PER- AND POLY-FLUOROALKYL SUBSTANCES 2814 9CL-PF3ONS < 1.700 NG/L 05-19-2026 3 2026/08
CA1910142_051_051 PER- AND POLY-FLUOROALKYL SUBSTANCES 2819 PERFLUOROBUTANOIC ACID (PFBA) < 1.700 NG/L 05-19-2026 3 2026/08
CA1910142_051_051 PER- AND POLY-FLUOROALKYL SUBSTANCES 2820 PERFLUOROOCTANE SULFONIC ACID 6:2 FTS < 1.700 NG/L 05-19-2026 3 2026/08
CA1910142_051_051 PER- AND POLY-FLUOROALKYL SUBSTANCES 2821 PERFLUOROHEXANE SULFONIC ACID 4:2 FTS < 1.700 NG/L 05-19-2026 3 2026/08
CA1910142_051_051 PER- AND POLY-FLUOROALKYL SUBSTANCES 2822 PERFLUORODECANE SULFONIC ACID 8:2 FTS < 1.700 NG/L 05-19-2026 3 2026/08
CA1910142_051_051 PER- AND POLY-FLUOROALKYL SUBSTANCES 2823 PERFLUORO PFMPA < 1.700 NG/L 05-19-2026 3 2026/08
CA1910142_051_051 PER- AND POLY-FLUOROALKYL SUBSTANCES 2824 PERFLUOROPENTANOIC ACID (PFPEA) < 1.700 NG/L 05-19-2026 3 2026/08
CA1910142_051_051 PER- AND POLY-FLUOROALKYL SUBSTANCES 2825 PERFLUORO PFMBA < 1.700 NG/L 05-19-2026 3 2026/08
CA1910142_051_051 PER- AND POLY-FLUOROALKYL SUBSTANCES 2826 PERFLUORO PFEESA < 1.700 NG/L 05-19-2026 3 2026/08
CA1910142_051_051 PER- AND POLY-FLUOROALKYL SUBSTANCES 2827 NONAFLUORO NFDHA < 1.700 NG/L 05-19-2026 3 2026/08
CA1910142_051_051 PER- AND POLY-FLUOROALKYL SUBSTANCES 2828 PERFLUOROPENTANESULFONIC ACID (PFPES) < 1.700 NG/L 05-19-2026 3 2026/08
CA1910142_051_051 PER- AND POLY-FLUOROALKYL SUBSTANCES 2829 PERFLUOROHEPTANESULFONIC ACID (PFHPS) < 1.700 NG/L 05-19-2026 3 2026/08
CA1910142_051_051 PER- AND POLY-FLUOROALKYL SUBSTANCES 2816 HFPO-DA < 1.700 NG/L 05-19-2026 3 2026/08
CA1910142_051_051 PER- AND POLY-FLUOROALKYL SUBSTANCES 2801 PERFLUOROBUTANESULFONIC ACID (PFBS) 1.900 1.700 NG/L 05-19-2026 3 2026/08
CA1910142_051_051 PER- AND POLY-FLUOROALKYL SUBSTANCES 2807 PERFLUORODECANOIC ACID (PFDA) < 1.700 NG/L 05-19-2026 3 2026/08
CA1910142_051_051 PER- AND POLY-FLUOROALKYL SUBSTANCES 2808 PERFLUORODODECANOIC ACID (PFDOA) < 1.700 NG/L 05-19-2026 3 2026/08
CA1910142_051_051 PER- AND POLY-FLUOROALKYL SUBSTANCES 2802 PERFLUOROHEPTANOIC ACID (PFHPA) < 1.700 NG/L 05-19-2026 3 2026/08
CA1910142_051_051 PER- AND POLY-FLUOROALKYL SUBSTANCES 2803 PERFLUOROHEXANE SULFONIC ACID (PFHXS) < 1.700 NG/L 05-19-2026 3 2026/08
CA1910142_051_051 PER- AND POLY-FLUOROALKYL SUBSTANCES 2809 PERFLUOROHEXANOIC ACID (PFHXA) < 1.700 NG/L 05-19-2026 3 2026/08
CA1910142_051_051 PER- AND POLY-FLUOROALKYL SUBSTANCES 2804 PERFLUORONONANOIC ACID (PFNA) < 1.700 NG/L 05-19-2026 3 2026/08
CA1910142_051_051 PER- AND POLY-FLUOROALKYL SUBSTANCES 2805 PERFLUOROCTANE SULFONIC ACID (PFOS) 5.200 1.700 NG/L 05-19-2026 3 2026/08
CA1910142_051_051 PER- AND POLY-FLUOROALKYL SUBSTANCES 2806 PERFLUOROCTANOIC ACID (PFOA) 1.700 1.700 NG/L 05-19-2026 3 2026/08
CA1910142_051_051 PER- AND POLY-FLUOROALKYL SUBSTANCES 2812 PERFLUOROUNDECANOIC ACID (PFUNA) < 1.700 NG/L 05-19-2026 3 2026/08
CA1910142_051_051 RADIOLOGICAL 4010 COMBINED RADIUM (-226 & -228) PCI/L 5 0 DUE NOW
CA1910142_051_051 RADIOLOGICAL 4109 GROSS ALPHA PARTICLE ACTIVITY < 3.000 PCI/L 15 3 02-14-2024 108 2033/02
CA1910142_051_051 RADIOLOGICAL 4020 RADIUM-226 < 0.600 PCI/L 1 02-23-2021 108 2030/02
CA1910142_051_051 RADIOLOGICAL 4030 RADIUM-228 < 0.700 PCI/L 1 02-23-2021 108 2030/02
CA1910142_051_051 RADIOLOGICAL 4006 COMBINED URANIUM 3.200 +/- 0.000 1.000 PCI/L 20 1 02-14-2024 72 2030/02
CA1910142_051_051 REGULATED VOC 2981 1,1,1-TRICHLOROETHANE < 0.500 UG/L 200 .5 03-18-2026 12 2027/03
CA1910142_051_051 REGULATED VOC 2988 1,1,2,2-TETRACHLOROETHANE < 0.500 UG/L 1 .5 03-18-2026 12 2027/03
CA1910142_051_051 REGULATED VOC 2985 1,1,2-TRICHLOROETHANE < 0.500 UG/L 5 .5 03-18-2026 12 2027/03
CA1910142_051_051 REGULATED VOC 2978 1,1-DICHLOROETHANE < 0.500 UG/L 5 .5 03-18-2026 12 2027/03
CA1910142_051_051 REGULATED VOC 2977 1,1-DICHLOROETHYLENE < 0.500 UG/L 6 .5 03-18-2026 12 2027/03
CA1910142_051_051 REGULATED VOC 2378 1,2,4-TRICHLOROBENZENE < 0.500 UG/L 5 .5 03-18-2026 12 2027/03
CA1910142_051_051 REGULATED VOC 2968 O-DICHLOROBENZENE < 0.500 UG/L 600 .5 03-18-2026 12 2027/03
CA1910142_051_051 REGULATED VOC 2980 1,2-DICHLOROETHANE < 0.500 UG/L .5 .5 03-18-2026 12 2027/03
CA1910142_051_051 REGULATED VOC 2983 1,2-DICHLOROPROPANE < 0.500 UG/L 5 .5 03-18-2026 12 2027/03
CA1910142_051_051 REGULATED VOC 2413 1,3-DICHLOROPROPENE < 0.500 UG/L .5 .5 03-18-2026 12 2027/03
CA1910142_051_051 REGULATED VOC 2969 P-DICHLOROBENZENE < 0.500 UG/L 5 .5 03-18-2026 12 2027/03
CA1910142_051_051 REGULATED VOC 2990 BENZENE < 0.500 UG/L 1 .5 03-18-2026 12 2027/03
CA1910142_051_051 REGULATED VOC 2982 CARBON TETRACHLORIDE < 0.500 UG/L .5 .5 03-18-2026 12 2027/03
CA1910142_051_051 REGULATED VOC 2380 CIS-1,2-DICHLOROETHYLENE < 0.500 UG/L 6 .5 03-18-2026 12 2027/03
CA1910142_051_051 REGULATED VOC 2964 DICHLOROMETHANE < 0.500 UG/L 5 .5 03-18-2026 12 2027/03
CA1910142_051_051 REGULATED VOC 2992 ETHYLBENZENE < 0.500 UG/L 300 .5 03-18-2026 12 2027/03
CA1910142_051_051 REGULATED VOC 2251 METHYL TERT-BUTYL ETHER < 3.000 UG/L 13 3 03-18-2026 12 2027/03
CA1910142_051_051 REGULATED VOC 2989 CHLOROBENZENE < 0.500 UG/L 70 .5 03-18-2026 12 2027/03
CA1910142_051_051 REGULATED VOC 2996 STYRENE < 0.500 UG/L 100 .5 03-18-2026 12 2027/03
CA1910142_051_051 REGULATED VOC 2987 TETRACHLOROETHYLENE < 0.500 UG/L 5 .5 03-18-2026 12 2027/03
CA1910142_051_051 REGULATED VOC 2991 TOLUENE < 0.500 UG/L 150 .5 03-18-2026 12 2027/03
CA1910142_051_051 REGULATED VOC 2979 TRANS-1,2-DICHLOROETHYLENE < 0.500 UG/L 10 .5 03-18-2026 12 2027/03
CA1910142_051_051 REGULATED VOC 2984 TRICHLOROETHYLENE < 0.500 UG/L 5 .5 03-18-2026 12 2027/03
CA1910142_051_051 REGULATED VOC 2218 TRICHLOROFLUOROMETHANE < 5.000 UG/L 150 5 03-18-2026 12 2027/03
CA1910142_051_051 REGULATED VOC 2904 TRICHLOROTRIFLUOROETHANE < 10.000 UG/L 1200 10 03-18-2026 12 2027/03
CA1910142_051_051 REGULATED VOC 2976 VINYL CHLORIDE < 0.500 UG/L .5 .5 03-18-2026 12 2027/03
CA1910142_051_051 REGULATED VOC 2955 XYLENES, TOTAL < 0.500 UG/L 1750 0.5 03-18-2026 12 2027/03
CA1910142_051_051 REGULATED SOC 2414 1,2,3-TRICHLOROPROPANE < 0.005 UG/L 0.005 0.005 08-22-2024 33 2027/05
CA1910142_051_051 REGULATED SOC 2105 2,4-D < 10.000 UG/L 70 10 05-14-2025 33 2028/02
CA1910142_051_051 REGULATED SOC 2051 LASSO (ALACHLOR) < 1.000 UG/L 2 1 05-14-2025 33 2028/02
CA1910142_051_051 REGULATED SOC 2050 ATRAZINE < 0.500 UG/L 1 .5 05-14-2025 33 2028/02
CA1910142_051_051 REGULATED SOC 2625 BENTAZON < 2.000 UG/L 18 2 05-14-2025 33 2028/02
CA1910142_051_051 REGULATED SOC 2046 CARBOFURAN < 5.000 UG/L 18 5 05-14-2025 33 2028/02
CA1910142_051_051 REGULATED SOC 2959 CHLORDANE < 0.100 UG/L .1 .1 05-14-2025 33 2028/02
CA1910142_051_051 REGULATED SOC 2039 DI(2-ETHYLHEXYL) PHTHALATE < 3.000 UG/L 4 3 05-14-2025 33 2028/02
CA1910142_051_051 REGULATED SOC 2931 1,2-DIBROMO-3-CHLOROPROPANE < 0.010 UG/L .2 .01 05-14-2025 33 2028/02
CA1910142_051_051 REGULATED SOC 2041 DINOSEB < 2.000 UG/L 7 2 05-14-2025 33 2028/02
CA1910142_051_051 REGULATED SOC 2032 DIQUAT < 4.000 UG/L 20 4 05-14-2025 33 2028/02
CA1910142_051_051 REGULATED SOC 2033 ENDOTHALL < 45.000 UG/L 100 45 05-14-2025 33 2028/02
CA1910142_051_051 REGULATED SOC 2005 ENDRIN < 0.100 UG/L 2 .1 05-14-2025 33 2028/02
CA1910142_051_051 REGULATED SOC 2946 ETHYLENE DIBROMIDE < 0.020 UG/L .05 .02 05-14-2025 33 2028/02
CA1910142_051_051 REGULATED SOC 2034 GLYPHOSATE < 25.000 UG/L 700 25 05-14-2025 33 2028/02
CA1910142_051_051 REGULATED SOC 2010 BHC-GAMMA < 0.200 UG/L .2 .2 05-14-2025 33 2028/02
CA1910142_051_051 REGULATED SOC 2015 METHOXYCHLOR < 10.000 UG/L 30 10 05-14-2025 33 2028/02
CA1910142_051_051 REGULATED SOC 2036 OXAMYL < 20.000 UG/L 50 20 05-14-2025 33 2028/02
CA1910142_051_051 REGULATED SOC 2326 PENTACHLOROPHENOL < 0.200 UG/L 1 .2 05-14-2025 33 2028/02
CA1910142_051_051 REGULATED SOC 2037 SIMAZINE < 1.000 UG/L 4 1 05-14-2025 33 2028/02
CA1910142_051_051 REGULATED SOC 2727 THIOBENCARB (BOLERO) < 1.000 UG/L 70 1 01-05-2017 33 2019/10 DUE NOW
CA1910142_051_051 REGULATED SOC 2020 TOXAPHENE < 1.000 UG/L 3 1 05-14-2025 33 2028/02
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.