Date:07-14-2025STATE OF CALIFORNIA 
LAST AND NEXT SAMPLE REPORT
SYSTEM NO.:4900704SYSTEM NAME:ALEXANDER VALLEY UNION SCHOOL DISTRICTCOUNTY: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
CA4900704_001_001 INORGANIC 1002 ALUMINUM < 50.000 UG/L 1000 50 04-18-2022 108 2031/04
CA4900704_001_001 INORGANIC 1074 ANTIMONY, TOTAL < 6.000 UG/L 6 6 04-18-2022 108 2031/04
CA4900704_001_001 INORGANIC 1005 ARSENIC 3.700 2.000 UG/L 10 2 04-07-2025 36 2028/04
CA4900704_001_001 INORGANIC 1094 ASBESTOS < 0.200 MFL 7 .2 12-18-2023 108 2032/12
CA4900704_001_001 INORGANIC 1010 BARIUM 170.000 100.000 UG/L 1000 100 04-18-2022 108 2031/04
CA4900704_001_001 INORGANIC 1075 BERYLLIUM, TOTAL < 1.000 UG/L 4 1 04-18-2022 108 2031/04
CA4900704_001_001 INORGANIC 1015 CADMIUM < 1.000 UG/L 5 1 04-18-2022 108 2031/04
CA4900704_001_001 INORGANIC 1020 CHROMIUM < 10.000 UG/L 50 10 04-18-2022 108 2031/04
CA4900704_001_001 INORGANIC 1080 CHROMIUM, HEX 0.030 0.020 UG/L 10 .1 12-09-2024 36 2027/12
CA4900704_001_001 INORGANIC 1025 FLUORIDE 0.300 0.100 MG/L 2 .1 04-18-2022 108 2031/04
CA4900704_001_001 INORGANIC 1035 MERCURY < 1.000 UG/L 2 1 04-18-2022 108 2031/04
CA4900704_001_001 INORGANIC 1036 NICKEL < 10.000 UG/L 100 10 04-18-2022 108 2031/04
CA4900704_001_001 INORGANIC 1039 PERCHLORATE < 2.000 UG/L 6 2 07-24-2023 36 2026/07
CA4900704_001_001 INORGANIC 1045 SELENIUM < 5.000 UG/L 50 5 04-18-2022 108 2031/04
CA4900704_001_001 INORGANIC 1085 THALLIUM, TOTAL < 1.000 UG/L 2 1 04-18-2022 108 2031/04
CA4900704_001_001 NITRATE/NITRITE 1040 NITRATE < 0.400 MG/L 10 .4 12-09-2024 12 2025/12
CA4900704_001_001 NITRATE/NITRITE 1041 NITRITE < 0.200 MG/L 1 .4 12-09-2024 36 2027/12
CA4900704_001_001 RADIOLOGICAL 4109 GROSS ALPHA PARTICLE ACTIVITY 1.860 +/- 1.790 2.000 PCI/L 15 3 10-19-2016 108 2025/10
CA4900704_001_001 REGULATED VOC 2981 1,1,1-TRICHLOROETHANE < 0.500 UG/L 200 .5 10-30-2023 72 2029/10
CA4900704_001_001 REGULATED VOC 2988 1,1,2,2-TETRACHLOROETHANE < 0.500 UG/L 1 .5 10-30-2023 72 2029/10
CA4900704_001_001 REGULATED VOC 2985 1,1,2-TRICHLOROETHANE < 0.500 UG/L 5 .5 10-30-2023 72 2029/10
CA4900704_001_001 REGULATED VOC 2978 1,1-DICHLOROETHANE < 0.500 UG/L 5 .5 10-30-2023 72 2029/10
CA4900704_001_001 REGULATED VOC 2977 1,1-DICHLOROETHYLENE < 0.500 UG/L 6 .5 10-30-2023 72 2029/10
CA4900704_001_001 REGULATED VOC 2378 1,2,4-TRICHLOROBENZENE < 0.500 UG/L 5 .5 10-30-2023 72 2029/10
CA4900704_001_001 REGULATED VOC 2968 O-DICHLOROBENZENE < 0.500 UG/L 600 .5 10-30-2023 72 2029/10
CA4900704_001_001 REGULATED VOC 2980 1,2-DICHLOROETHANE < 0.500 UG/L .5 .5 10-30-2023 72 2029/10
CA4900704_001_001 REGULATED VOC 2983 1,2-DICHLOROPROPANE < 0.500 UG/L 5 .5 10-30-2023 72 2029/10
CA4900704_001_001 REGULATED VOC 2413 1,3-DICHLOROPROPENE < 0.500 UG/L .5 .5 10-30-2023 72 2029/10
CA4900704_001_001 REGULATED VOC 2969 P-DICHLOROBENZENE < 0.500 UG/L 5 .5 10-30-2023 72 2029/10
CA4900704_001_001 REGULATED VOC 2990 BENZENE < 0.500 UG/L 1 .5 10-30-2023 72 2029/10
CA4900704_001_001 REGULATED VOC 2982 CARBON TETRACHLORIDE < 0.500 UG/L .5 .5 10-30-2023 72 2029/10
CA4900704_001_001 REGULATED VOC 2380 CIS-1,2-DICHLOROETHYLENE < 0.500 UG/L 6 .5 10-30-2023 72 2029/10
CA4900704_001_001 REGULATED VOC 2964 DICHLOROMETHANE < 0.500 UG/L 5 .5 10-30-2023 72 2029/10
CA4900704_001_001 REGULATED VOC 2992 ETHYLBENZENE < 0.500 UG/L 300 .5 10-30-2023 72 2029/10
CA4900704_001_001 REGULATED VOC 2251 METHYL TERT-BUTYL ETHER < 3.000 UG/L 13 3 10-30-2023 72 2029/10
CA4900704_001_001 REGULATED VOC 2989 CHLOROBENZENE < 0.500 UG/L 70 .5 10-30-2023 72 2029/10
CA4900704_001_001 REGULATED VOC 2996 STYRENE < 0.500 UG/L 100 .5 10-30-2023 72 2029/10
CA4900704_001_001 REGULATED VOC 2987 TETRACHLOROETHYLENE < 0.500 UG/L 5 .5 10-30-2023 72 2029/10
CA4900704_001_001 REGULATED VOC 2991 TOLUENE < 0.500 UG/L 150 .5 10-30-2023 72 2029/10
CA4900704_001_001 REGULATED VOC 2979 TRANS-1,2-DICHLOROETHYLENE < 0.500 UG/L 10 .5 10-30-2023 72 2029/10
CA4900704_001_001 REGULATED VOC 2984 TRICHLOROETHYLENE < 0.500 UG/L 5 .5 10-30-2023 72 2029/10
CA4900704_001_001 REGULATED VOC 2218 TRICHLOROFLUOROMETHANE < 5.000 UG/L 150 5 10-30-2023 72 2029/10
CA4900704_001_001 REGULATED VOC 2904 TRICHLOROTRIFLUOROETHANE < 10.000 UG/L 1200 10 10-30-2023 72 2029/10
CA4900704_001_001 REGULATED VOC 2976 VINYL CHLORIDE < 0.500 UG/L .5 .5 10-30-2023 72 2029/10
CA4900704_001_001 REGULATED VOC 2955 XYLENES, TOTAL < 0.500 UG/L 1750 0.5 10-30-2023 72 2029/10
CA4900704_001_001 REGULATED SOC 2414 1,2,3-TRICHLOROPROPANE < 0.005 UG/L 0.005 12-09-2024 36 2027/12
CA4900704_001_001 REGULATED SOC 2110 2,4,5-TP < 1.000 UG/L 50 1 04-07-2025 108 2034/04
CA4900704_001_001 REGULATED SOC 2105 2,4-D < 10.000 UG/L 70 10 04-07-2025 108 2034/04
CA4900704_001_001 REGULATED SOC 2050 ATRAZINE < 0.500 UG/L 1 .5 04-07-2025 36 2028/04
CA4900704_001_001 REGULATED SOC 2046 CARBOFURAN < 2.000 UG/L 18 5 04-07-2025 36 2028/04
CA4900704_001_001 REGULATED SOC 2031 DALAPON < 10.000 UG/L 200 10 04-07-2025 36 2028/04
CA4900704_001_001 REGULATED SOC 2041 DINOSEB < 2.000 UG/L 7 2 04-07-2025 36 2028/04
CA4900704_001_001 REGULATED SOC 2032 DIQUAT < 4.000 UG/L 20 4 04-24-2025 36 2028/04
CA4900704_001_001 REGULATED SOC 2033 ENDOTHALL < 45.000 UG/L 100 45 04-24-2025 36 2028/04
CA4900704_001_001 REGULATED SOC 2946 ETHYLENE DIBROMIDE < UG/L .05 .02 12-13-2017 108 2026/12
CA4900704_001_001 REGULATED SOC 2065 HEPTACHLOR < UG/L .01 .01 12-13-2017 108 2026/12
CA4900704_001_001 REGULATED SOC 2067 HEPTACHLOR EPOXIDE < UG/L .01 .01 12-13-2017 108 2026/12
CA4900704_001_001 REGULATED SOC 2010 BHC-GAMMA < 0.200 UG/L .2 .2 12-13-2017 108 2026/12
CA4900704_001_001 REGULATED SOC 2015 METHOXYCHLOR < 10.000 UG/L 30 10 12-13-2017 108 2026/12
CA4900704_001_001 REGULATED SOC 2036 OXAMYL < 2.000 UG/L 50 20 04-07-2025 36 2028/04
CA4900704_001_001 REGULATED SOC 2326 PENTACHLOROPHENOL < 0.200 UG/L 1 .2 04-07-2025 36 2028/04
CA4900704_001_001 REGULATED SOC 2040 PICLORAM < 1.000 UG/L 500 1 04-07-2025 36 2028/04
CA4900704_001_001 REGULATED SOC 2037 SIMAZINE < 1.000 UG/L 4 1 04-07-2025 36 2028/04
CA4900704_001_001 REGULATED SOC 2020 TOXAPHENE < 1.000 UG/L 3 1 12-13-2017 108 2026/12
CA4900704_DST_003 DISINFECTION BYPRODUCTS 2456 TOTAL HALOACETIC ACIDS (HAA5) < 1.000 UG/L 60 08-16-2022 36 2025/08
CA4900704_DST_003 DISINFECTION BYPRODUCTS 2950 TTHM 1.050 1.000 UG/L 80 08-16-2022 36 2025/08
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.