Date:06-16-2024STATE OF CALIFORNIA 
LAST AND NEXT SAMPLE REPORT
SYSTEM NO.:1710001SYSTEM NAME:CLEARLAKE OAKS COUNTY WATER DISTRICTCOUNTY:LAKE 
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
CA1710001_004_004 INORGANIC-202412 1074 ANTIMONY, TOTAL < 6.000 UG/L 6 6 12-13-2023 12 2024/12
CA1710001_004_004 INORGANIC-202412 1005 ARSENIC 3.100 2.000 UG/L 10 2 12-13-2023 12 2024/12
CA1710001_004_004 INORGANIC-202710 1094 ASBESTOS < 0.200 MFL 7 .2 10-23-2018 108 2027/10
CA1710001_004_004 INORGANIC-202412 1010 BARIUM < 100.000 UG/L 1000 100 12-13-2023 12 2024/12
CA1710001_004_004 INORGANIC-202412 1075 BERYLLIUM, TOTAL < 1.000 UG/L 4 1 12-13-2023 12 2024/12
CA1710001_004_004 INORGANIC-202412 1015 CADMIUM < 1.000 UG/L 5 1 12-13-2023 12 2024/12
CA1710001_004_004 INORGANIC-202412 1020 CHROMIUM < 10.000 UG/L 50 10 12-13-2023 12 2024/12
CA1710001_004_004 INORGANIC-202412 1025 FLUORIDE 0.130 0.100 MG/L 2 .1 12-13-2023 12 2024/12
CA1710001_004_004 INORGANIC-202412 1035 MERCURY < 1.000 UG/L 2 1 12-13-2023 12 2024/12
CA1710001_004_004 INORGANIC-202412 1036 NICKEL < 10.000 UG/L 100 10 12-13-2023 12 2024/12
CA1710001_004_004 INORGANIC-202502 1039 PERCHLORATE < 1.000 UG/L 6 1 02-13-2024 12 2025/02
CA1710001_004_004 INORGANIC-202412 1045 SELENIUM < 5.000 UG/L 50 5 12-13-2023 12 2024/12
CA1710001_004_004 INORGANIC-202412 1085 THALLIUM, TOTAL < 1.000 UG/L 2 1 12-13-2023 12 2024/12
CA1710001_004_004 NITRATE/NITRITE-202503 1040 NITRATE < 0.400 MG/L 10 .4 03-13-2024 12 2025/03
CA1710001_004_004 NITRATE/NITRITE-202405 1041 NITRITE < 0.400 MG/L 1 .4 05-19-2021 36 2024/05 DUE NOW
CA1710001_004_004 RADIOLOGICAL-202411 4109 GROSS ALPHA PARTICLE ACTIVITY 0.426 +/- 1.010 1.400 PCI/L 15 3 11-12-2015 108 2024/11
CA1710001_004_004 REGULATED VOC-202602 2981 1,1,1-TRICHLOROETHANE < 0.500 UG/L 200 .5 02-09-2023 36 2026/02
CA1710001_004_004 REGULATED VOC-202602 2988 1,1,2,2-TETRACHLOROETHANE < 0.500 UG/L 1 .5 02-09-2023 36 2026/02
CA1710001_004_004 REGULATED VOC-202602 2985 1,1,2-TRICHLOROETHANE < 0.500 UG/L 5 .5 02-09-2023 36 2026/02
CA1710001_004_004 REGULATED VOC-202602 2978 1,1-DICHLOROETHANE < 0.500 UG/L 5 .5 02-09-2023 36 2026/02
CA1710001_004_004 REGULATED VOC-202602 2977 1,1-DICHLOROETHYLENE < 0.500 UG/L 6 .5 02-09-2023 36 2026/02
CA1710001_004_004 REGULATED VOC-202602 2378 1,2,4-TRICHLOROBENZENE < 0.500 UG/L 5 .5 02-09-2023 36 2026/02
CA1710001_004_004 REGULATED VOC-202602 2968 O-DICHLOROBENZENE < 0.500 UG/L 600 .5 02-09-2023 36 2026/02
CA1710001_004_004 REGULATED VOC-202602 2980 1,2-DICHLOROETHANE < 0.500 UG/L .5 .5 02-09-2023 36 2026/02
CA1710001_004_004 REGULATED VOC-202602 2983 1,2-DICHLOROPROPANE < 0.500 UG/L 5 .5 02-09-2023 36 2026/02
CA1710001_004_004 REGULATED VOC-202602 2413 1,3-DICHLOROPROPENE < 0.500 UG/L .5 .5 02-09-2023 36 2026/02
CA1710001_004_004 REGULATED VOC-202602 2969 P-DICHLOROBENZENE < 0.500 UG/L 5 .5 02-09-2023 36 2026/02
CA1710001_004_004 REGULATED VOC-202602 2990 BENZENE < 0.500 UG/L 1 .5 02-09-2023 36 2026/02
CA1710001_004_004 REGULATED VOC-202602 2982 CARBON TETRACHLORIDE < 0.500 UG/L .5 .5 02-09-2023 36 2026/02
CA1710001_004_004 REGULATED VOC-202602 2380 CIS-1,2-DICHLOROETHYLENE < 0.500 UG/L 6 .5 02-09-2023 36 2026/02
CA1710001_004_004 REGULATED VOC-202602 2964 DICHLOROMETHANE < 0.500 UG/L 5 .5 02-09-2023 36 2026/02
CA1710001_004_004 REGULATED VOC-202602 2992 ETHYLBENZENE < 0.500 UG/L 300 .5 02-09-2023 36 2026/02
CA1710001_004_004 REGULATED VOC-202602 2989 CHLOROBENZENE < 0.500 UG/L 70 .5 02-09-2023 36 2026/02
CA1710001_004_004 REGULATED VOC-202602 2996 STYRENE < 0.500 UG/L 100 .5 02-09-2023 36 2026/02
CA1710001_004_004 REGULATED VOC-202602 2987 TETRACHLOROETHYLENE < 0.500 UG/L 5 .5 02-09-2023 36 2026/02
CA1710001_004_004 REGULATED VOC-202602 2991 TOLUENE < 0.500 UG/L 150 .5 02-09-2023 36 2026/02
CA1710001_004_004 REGULATED VOC-202602 2979 TRANS-1,2-DICHLOROETHYLENE < 0.500 UG/L 10 .5 02-09-2023 36 2026/02
CA1710001_004_004 REGULATED VOC-202602 2984 TRICHLOROETHYLENE < 0.500 UG/L 5 .5 02-09-2023 36 2026/02
CA1710001_004_004 REGULATED VOC-202602 2218 TRICHLOROFLUOROMETHANE < 0.500 UG/L 150 5 02-09-2023 36 2026/02
CA1710001_004_004 REGULATED VOC-202602 2904 TRICHLOROTRIFLUOROETHANE < 0.500 UG/L 1200 10 02-09-2023 36 2026/02
CA1710001_004_004 REGULATED VOC-202602 2976 VINYL CHLORIDE < 0.500 UG/L .5 .5 02-09-2023 36 2026/02
CA1710001_004_004 REGULATED VOC-202602 2955 XYLENES, TOTAL < 0.500 UG/L 1750 0.5 02-09-2023 36 2026/02
CA1710001_004_004 REGULATED SOC-202602 2414 1,2,3-TRICHLOROPROPANE < 0.005 UG/L 0.005 02-09-2023 36 2026/02
CA1710001_004_004 REGULATED SOC-203112 2110 2,4,5-TP < 1.000 UG/L 50 1 12-28-2022 108 2031/12
CA1710001_004_004 REGULATED SOC-203112 2105 2,4-D < 10.000 UG/L 70 10 12-28-2022 108 2031/12
CA1710001_004_004 REGULATED SOC-202612 2050 ATRAZINE < 0.240 UG/L 1 .5 12-29-2023 36 2026/12
CA1710001_004_004 REGULATED SOC-202512 2046 CARBOFURAN < 5.000 UG/L 18 5 12-28-2022 36 2025/12
CA1710001_004_004 REGULATED SOC-202512 2031 DALAPON < 10.000 UG/L 200 10 12-28-2022 36 2025/12
CA1710001_004_004 REGULATED SOC-202512 2041 DINOSEB < 2.000 UG/L 7 2 12-28-2022 36 2025/12
CA1710001_004_004 REGULATED SOC-202512 2032 DIQUAT < 4.000 UG/L 20 4 12-28-2022 36 2025/12
CA1710001_004_004 REGULATED SOC-202601 2033 ENDOTHALL < 45.000 UG/L 100 45 01-09-2023 36 2026/01
CA1710001_004_004 REGULATED SOC-203107 2946 ETHYLENE DIBROMIDE < 0.020 UG/L .05 .02 07-13-2022 108 2031/07
CA1710001_004_004 REGULATED SOC-203106 2065 HEPTACHLOR < 0.010 UG/L .01 .01 06-09-2022 108 2031/06
CA1710001_004_004 REGULATED SOC-203106 2067 HEPTACHLOR EPOXIDE < 0.010 UG/L .01 .01 06-09-2022 108 2031/06
CA1710001_004_004 REGULATED SOC-203106 2010 BHC-GAMMA < 0.200 UG/L .2 .2 06-09-2022 108 2031/06
CA1710001_004_004 REGULATED SOC-203106 2015 METHOXYCHLOR < 10.000 UG/L 30 10 06-09-2022 108 2031/06
CA1710001_004_004 REGULATED SOC-202512 2036 OXAMYL < 20.000 UG/L 50 20 12-28-2022 36 2025/12
CA1710001_004_004 REGULATED SOC-202512 2326 PENTACHLOROPHENOL < 0.200 UG/L 1 .2 12-28-2022 36 2025/12
CA1710001_004_004 REGULATED SOC-202512 2040 PICLORAM < 1.000 UG/L 500 1 12-28-2022 36 2025/12
CA1710001_004_004 REGULATED SOC-202412 2037 SIMAZINE < 0.240 UG/L 4 1 12-29-2023 12 2024/12
CA1710001_004_004 REGULATED SOC-203106 2020 TOXAPHENE < 1.000 UG/L 3 1 06-09-2022 108 2031/06
CA1710001_004_004 GENERAL NON CHAP 15-202505 1927 ALKALINITY, TOTAL 140.000 5.000 MG/L 05-14-2024 12 2025/05
CA1710001_005_005 DISINFECTION BYPRODUCTS-202406 1011 BROMATE < 5.000 UG/L 10 5 03-13-2024 3 2024/06 DUE NOW
CA1710001_005_005 SECONDARY/GP-202412 1928 ALKALINITY, BICARBONATE 160.000 5.000 MG/L 12-13-2023 12 2024/12
CA1710001_005_005 SECONDARY/GP-202412 1919 CALCIUM 26.000 1.000 MG/L 12-13-2023 12 2024/12
CA1710001_005_005 SECONDARY/GP-202412 1929 ALKALINITY, CARBONATE < 5.000 MG/L 12-13-2023 12 2024/12
CA1710001_005_005 SECONDARY/GP-202412 1017 CHLORIDE 17.000 0.500 MG/L 500 12-13-2023 12 2024/12
CA1710001_005_005 SECONDARY/GP-202412 1905 COLOR < 5.000 UNITS 15 12-13-2023 12 2024/12
CA1710001_005_005 SECONDARY/GP-202412 1022 COPPER, FREE < 50.000 UG/L 1000 50 12-13-2023 12 2024/12
CA1710001_005_005 SECONDARY/GP-202501 2905 FOAMING AGENTS (SURFACTANTS) < 0.050 MG/L .5 01-10-2024 12 2025/01
CA1710001_005_005 SECONDARY/GP-202412 1915 HARDNESS, TOTAL (AS CACO3) 141.000 5.000 MG/L 12-13-2023 12 2024/12
CA1710001_005_005 SECONDARY/GP-202412 1021 HYDROXIDE AS CALCIUM CARBONATE < 5.000 MG/L 12-13-2023 12 2024/12
CA1710001_005_005 SECONDARY/GP-202412 1028 IRON < 100.000 UG/L 300 12-13-2023 12 2024/12
CA1710001_005_005 SECONDARY/GP-202412 1031 MAGNESIUM 18.000 1.000 MG/L 12-13-2023 12 2024/12
CA1710001_005_005 SECONDARY/GP-202412 1032 MANGANESE < 20.000 UG/L 50 12-13-2023 12 2024/12
CA1710001_005_005 SECONDARY/GP-202412 1920 ODOR 1.800 1.000 TON 3 1 12-20-2023 12 2024/12
CA1710001_005_005 SECONDARY/GP-202412 1925 PH 8.350 1.680 pH 12-13-2023 12 2024/12
CA1710001_005_005 SECONDARY/GP-202412 1050 SILVER < 10.000 UG/L 100 10 12-13-2023 12 2024/12
CA1710001_005_005 SECONDARY/GP-202412 1052 SODIUM 17.000 1.000 MG/L 12-13-2023 12 2024/12
CA1710001_005_005 SECONDARY/GP-202412 1064 CONDUCTIVITY @ 25 C UMHOS/CM 370.000 20.000 UMHO/CM 1600 12-13-2023 12 2024/12
CA1710001_005_005 SECONDARY/GP-202412 1055 SULFATE 4.200 0.500 MG/L 500 .5 12-13-2023 12 2024/12
CA1710001_005_005 SECONDARY/GP-202412 1930 TDS 210.000 10.000 MG/L 1000 12-13-2023 12 2024/12
CA1710001_005_005 SECONDARY/GP-202412 0100 TURBIDITY < 0.200 NTU 5 .1 12-13-2023 12 2024/12
CA1710001_005_005 SECONDARY/GP-202412 1095 ZINC < 50.000 UG/L 5000 50 12-13-2023 12 2024/12
CA1710001_005_005 INORGANIC-202502 1002 ALUMINUM < 50.000 UG/L 1000 50 02-13-2024 12 2025/02
CA1710001_005_005 REGULATED VOC-202412 2251 METHYL TERT-BUTYL ETHER < 3.000 UG/L 13 3 12-27-2023 12 2024/12
CA1710001_005_005 REGULATED SOC-202504 2727 THIOBENCARB (BOLERO) < 0.240 UG/L 70 1 04-17-2024 12 2025/04
CA1710001_DST_006 DISINFECTION BYPRODUCTS-202406 2456 TOTAL HALOACETIC ACIDS (HAA5) 94.400 1.000 UG/L 60 03-20-2024 3 2024/06 DUE NOW
CA1710001_DST_006 DISINFECTION BYPRODUCTS-202406 2950 TTHM 64.950 1.000 UG/L 80 03-20-2024 3 2024/06 DUE NOW
CA1710001_DST_012 DISINFECTION BYPRODUCTS-202408 2456 TOTAL HALOACETIC ACIDS (HAA5) 16.100 1.000 UG/L 60 05-15-2024 3 2024/08
CA1710001_DST_012 DISINFECTION BYPRODUCTS-202408 2950 TTHM 55.200 1.000 UG/L 80 05-15-2024 3 2024/08
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.