Date:06-26-2024STATE OF CALIFORNIA 
LAST AND NEXT SAMPLE REPORT
SYSTEM NO.:4910018SYSTEM NAME:ARMSTRONG VALLEY-CAL WATER SERVICE (PUC)COUNTY:SONOMA 
SOURCE NO.:All SourcesSOURCE NAME:N/ASOURCE CLASS:N/ASTATUS:N/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
CA4910018_001_001 NITRATE/NITRITE-202505 1040 NITRATE 0.400 0.400 MG/L 10 .4 05-23-2024 12 2025/05
CA4910018_001_001 NITRATE/NITRITE-202705 1041 NITRITE < 0.400 MG/L 1 .4 05-23-2024 36 2027/05
CA4910018_002_002 SECONDARY/GP-202606 1928 ALKALINITY, BICARBONATE 130.000 3.000 MG/L 06-12-2023 36 2026/06
CA4910018_002_002 SECONDARY/GP-202606 1919 CALCIUM 22.000 0.100 MG/L 06-12-2023 36 2026/06
CA4910018_002_002 SECONDARY/GP-202606 1929 ALKALINITY, CARBONATE < 3.000 MG/L 06-12-2023 36 2026/06
CA4910018_002_002 SECONDARY/GP-202606 1017 CHLORIDE 6.200 1.000 MG/L 500 06-12-2023 36 2026/06
CA4910018_002_002 SECONDARY/GP-202606 1905 COLOR < 5.000 UNITS 15 06-12-2023 36 2026/06
CA4910018_002_002 SECONDARY/GP-202606 1022 COPPER, FREE < 5.000 UG/L 1000 50 06-12-2023 36 2026/06
CA4910018_002_002 SECONDARY/GP-202606 2905 FOAMING AGENTS (SURFACTANTS) < 0.050 MG/L .5 06-12-2023 36 2026/06
CA4910018_002_002 SECONDARY/GP-202606 1915 HARDNESS, TOTAL (AS CACO3) 110.000 0.410 MG/L 06-12-2023 36 2026/06
CA4910018_002_002 SECONDARY/GP-202606 1021 HYDROXIDE AS CALCIUM CARBONATE < 3.000 MG/L 06-12-2023 36 2026/06
CA4910018_002_002 SECONDARY/GP-202606 1028 IRON < 30.000 UG/L 300 06-12-2023 36 2026/06
CA4910018_002_002 SECONDARY/GP-202606 1031 MAGNESIUM 13.000 0.100 MG/L 06-12-2023 36 2026/06
CA4910018_002_002 SECONDARY/GP-202606 1032 MANGANESE < 10.000 UG/L 50 06-12-2023 36 2026/06
CA4910018_002_002 SECONDARY/GP-202606 1920 ODOR < 1.000 TON 3 1 06-12-2023 36 2026/06
CA4910018_002_002 GENERAL NON CHAP 15-202606 C253 PH, FIELD 6.700 pH 06-12-2023 36 2026/06
CA4910018_002_002 SECONDARY/GP-202606 1050 SILVER < 10.000 UG/L 100 10 06-12-2023 36 2026/06
CA4910018_002_002 SECONDARY/GP-202606 1052 SODIUM 9.500 1.000 MG/L 06-12-2023 36 2026/06
CA4910018_002_002 SECONDARY/GP-202606 1064 CONDUCTIVITY @ 25 C UMHOS/CM 260.000 1.000 UMHO/CM 1600 06-12-2023 36 2026/06
CA4910018_002_002 SECONDARY/GP-202606 1055 SULFATE 12.000 1.000 MG/L 500 .5 06-12-2023 36 2026/06
CA4910018_002_002 SECONDARY/GP-202606 1930 TDS 150.000 5.000 MG/L 1000 06-12-2023 36 2026/06
CA4910018_002_002 SECONDARY/GP-202606 0100 TURBIDITY 0.340 0.100 NTU 5 .1 06-12-2023 36 2026/06
CA4910018_002_002 SECONDARY/GP-202606 1095 ZINC < 50.000 UG/L 5000 50 06-12-2023 36 2026/06
CA4910018_002_002 INORGANIC-202606 1002 ALUMINUM < 50.000 UG/L 1000 50 06-12-2023 36 2026/06
CA4910018_002_002 INORGANIC-202606 1074 ANTIMONY, TOTAL < 2.000 UG/L 6 6 06-12-2023 36 2026/06
CA4910018_002_002 INORGANIC-202606 1005 ARSENIC < 2.000 UG/L 10 2 06-12-2023 36 2026/06
CA4910018_002_002 INORGANIC-202411 1094 ASBESTOS < 0.200 MFL 7 .2 11-19-2015 108 2024/11
CA4910018_002_002 INORGANIC-202606 1010 BARIUM < 50.000 UG/L 1000 100 06-12-2023 36 2026/06
CA4910018_002_002 INORGANIC-202606 1075 BERYLLIUM, TOTAL < 1.000 UG/L 4 1 06-12-2023 36 2026/06
CA4910018_002_002 INORGANIC-202606 1015 CADMIUM < 1.000 UG/L 5 1 06-12-2023 36 2026/06
CA4910018_002_002 INORGANIC-202606 1020 CHROMIUM < 10.000 UG/L 50 10 06-12-2023 36 2026/06
CA4910018_002_002 INORGANIC-202606 1025 FLUORIDE 0.140 0.100 MG/L 2 .1 06-12-2023 36 2026/06
CA4910018_002_002 INORGANIC-202606 1035 MERCURY < 0.200 UG/L 2 1 06-12-2023 36 2026/06
CA4910018_002_002 INORGANIC-202606 1036 NICKEL < 10.000 UG/L 100 10 06-12-2023 36 2026/06
CA4910018_002_002 INORGANIC-202606 1039 PERCHLORATE < 2.000 UG/L 6 2 06-12-2023 36 2026/06
CA4910018_002_002 INORGANIC-202606 1045 SELENIUM < 2.000 UG/L 50 5 06-12-2023 36 2026/06
CA4910018_002_002 INORGANIC-202606 1085 THALLIUM, TOTAL < 1.000 UG/L 2 1 06-12-2023 36 2026/06
CA4910018_002_002 NITRATE/NITRITE-202406 1040 NITRATE 0.300 0.230 MG/L 10 .4 06-12-2023 12 2024/06 DUE NOW
CA4910018_002_002 NITRATE/NITRITE-202606 1041 NITRITE < 0.050 MG/L 1 .4 06-12-2023 36 2026/06
CA4910018_002_002 RADIOLOGICAL-202410 4109 GROSS ALPHA PARTICLE ACTIVITY < 3.000 PCI/L 15 3 10-22-2015 108 2024/10
CA4910018_002_002 REGULATED VOC-202711 2981 1,1,1-TRICHLOROETHANE < 0.500 UG/L 200 .5 11-17-2021 72 2027/11
CA4910018_002_002 REGULATED VOC-202711 2988 1,1,2,2-TETRACHLOROETHANE < 0.500 UG/L 1 .5 11-17-2021 72 2027/11
CA4910018_002_002 REGULATED VOC-202711 2985 1,1,2-TRICHLOROETHANE < 0.500 UG/L 5 .5 11-17-2021 72 2027/11
CA4910018_002_002 REGULATED VOC-202711 2978 1,1-DICHLOROETHANE < 0.500 UG/L 5 .5 11-17-2021 72 2027/11
CA4910018_002_002 REGULATED VOC-202711 2977 1,1-DICHLOROETHYLENE < 0.500 UG/L 6 .5 11-17-2021 72 2027/11
CA4910018_002_002 REGULATED VOC-202711 2378 1,2,4-TRICHLOROBENZENE < 0.500 UG/L 5 .5 11-17-2021 72 2027/11
CA4910018_002_002 REGULATED VOC-202711 2968 O-DICHLOROBENZENE < 0.500 UG/L 600 .5 11-17-2021 72 2027/11
CA4910018_002_002 REGULATED VOC-202711 2980 1,2-DICHLOROETHANE < 0.500 UG/L .5 .5 11-17-2021 72 2027/11
CA4910018_002_002 REGULATED VOC-202711 2983 1,2-DICHLOROPROPANE < 0.500 UG/L 5 .5 11-17-2021 72 2027/11
CA4910018_002_002 REGULATED VOC-202711 2413 1,3-DICHLOROPROPENE < 0.500 UG/L .5 .5 11-17-2021 72 2027/11
CA4910018_002_002 REGULATED VOC-202711 2969 P-DICHLOROBENZENE < 0.500 UG/L 5 .5 11-17-2021 72 2027/11
CA4910018_002_002 REGULATED VOC-202711 2990 BENZENE < 0.500 UG/L 1 .5 11-17-2021 72 2027/11
CA4910018_002_002 REGULATED VOC-202711 2982 CARBON TETRACHLORIDE < 0.500 UG/L .5 .5 11-17-2021 72 2027/11
CA4910018_002_002 REGULATED VOC-202711 2380 CIS-1,2-DICHLOROETHYLENE < 0.500 UG/L 6 .5 11-17-2021 72 2027/11
CA4910018_002_002 REGULATED VOC-202711 2964 DICHLOROMETHANE < 0.500 UG/L 5 .5 11-17-2021 72 2027/11
CA4910018_002_002 REGULATED VOC-202711 2992 ETHYLBENZENE < 0.500 UG/L 300 .5 11-17-2021 72 2027/11
CA4910018_002_002 REGULATED VOC-202711 2251 METHYL TERT-BUTYL ETHER < 0.500 UG/L 13 3 11-17-2021 72 2027/11
CA4910018_002_002 REGULATED VOC-202711 2989 CHLOROBENZENE < 0.500 UG/L 70 .5 11-17-2021 72 2027/11
CA4910018_002_002 REGULATED VOC-202711 2996 STYRENE < 0.500 UG/L 100 .5 11-17-2021 72 2027/11
CA4910018_002_002 REGULATED VOC-202711 2987 TETRACHLOROETHYLENE < 0.500 UG/L 5 .5 11-17-2021 72 2027/11
CA4910018_002_002 REGULATED VOC-202711 2991 TOLUENE < 0.500 UG/L 150 .5 11-17-2021 72 2027/11
CA4910018_002_002 REGULATED VOC-202711 2979 TRANS-1,2-DICHLOROETHYLENE < 0.500 UG/L 10 .5 11-17-2021 72 2027/11
CA4910018_002_002 REGULATED VOC-202711 2984 TRICHLOROETHYLENE < 0.500 UG/L 5 .5 11-17-2021 72 2027/11
CA4910018_002_002 REGULATED VOC-202711 2218 TRICHLOROFLUOROMETHANE < 0.500 UG/L 150 5 11-17-2021 72 2027/11
CA4910018_002_002 REGULATED VOC-202711 2904 TRICHLOROTRIFLUOROETHANE < 0.500 UG/L 1200 10 11-17-2021 72 2027/11
CA4910018_002_002 REGULATED VOC-202711 2976 VINYL CHLORIDE < 0.300 UG/L .5 .5 11-17-2021 72 2027/11
CA4910018_002_002 REGULATED VOC-202711 2955 XYLENES, TOTAL < 0.500 UG/L 1750 0.5 11-17-2021 72 2027/11
CA4910018_002_002 REGULATED SOC-202406 2414 1,2,3-TRICHLOROPROPANE < UG/L 0.005 06-16-2021 36 2024/06 DUE NOW
CA4910018_002_002 REGULATED SOC-202805 2110 2,4,5-TP < 1.000 UG/L 50 1 05-09-2019 108 2028/05
CA4910018_002_002 REGULATED SOC-202805 2105 2,4-D < 10.000 UG/L 70 10 05-09-2019 108 2028/05
CA4910018_002_002 REGULATED SOC-202505 2050 ATRAZINE < 0.500 UG/L 1 .5 05-09-2022 36 2025/05
CA4910018_002_002 REGULATED SOC-202805 2031 DALAPON < 10.000 UG/L 200 10 05-09-2019 108 2028/05
CA4910018_002_002 REGULATED SOC-202505 2037 SIMAZINE < 1.000 UG/L 4 1 05-09-2022 36 2025/05
CA4910018_002_002 GENERAL NON CHAP 15-202606 1927 ALKALINITY, TOTAL 130.000 3.000 MG/L 06-12-2023 36 2026/06
CA4910018_DST_005 DISINFECTION BYPRODUCTS-202608 2456 TOTAL HALOACETIC ACIDS (HAA5) < 2.000 UG/L 60 08-14-2023 36 2026/08
CA4910018_DST_005 DISINFECTION BYPRODUCTS-202608 2950 TTHM < 4.000 UG/L 80 08-14-2023 36 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.