Date:05-18-2024STATE OF CALIFORNIA 
LAST AND NEXT SAMPLE REPORT
SYSTEM NO.:1210015SYSTEM NAME:WILLOW CREEK C.S.D.COUNTY:HUMBOLDT 
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
CA1210015_004_004 SECONDARY/GP-203103 1928 ALKALINITY, BICARBONATE 92.830 1.000 MG/L 03-03-2022 108 2031/03
CA1210015_004_004 SECONDARY/GP-203103 1919 CALCIUM 18.620 0.200 MG/L 03-03-2022 108 2031/03
CA1210015_004_004 SECONDARY/GP-203103 1929 ALKALINITY, CARBONATE < 1.000 MG/L 03-03-2022 108 2031/03
CA1210015_004_004 SECONDARY/GP-203103 1017 CHLORIDE 2.910 0.500 MG/L 500 03-03-2022 108 2031/03
CA1210015_004_004 SECONDARY/GP-203103 1022 COPPER, FREE 6.760 1.000 UG/L 1000 50 03-03-2022 108 2031/03
CA1210015_004_004 SECONDARY/GP-202603 2905 FOAMING AGENTS (SURFACTANTS) < 0.100 MG/L .5 03-29-2017 108 2026/03
CA1210015_004_004 SECONDARY/GP-203103 1915 HARDNESS, TOTAL (AS CACO3) 103.950 1.000 MG/L 03-03-2022 108 2031/03
CA1210015_004_004 SECONDARY/GP-203103 1021 HYDROXIDE AS CALCIUM CARBONATE < 1.000 MG/L 03-03-2022 108 2031/03
CA1210015_004_004 SECONDARY/GP-203103 1028 IRON < 50.000 UG/L 300 100 03-03-2022 108 2031/03
CA1210015_004_004 SECONDARY/GP-203103 1031 MAGNESIUM 13.950 0.100 MG/L 03-03-2022 108 2031/03
CA1210015_004_004 SECONDARY/GP-203103 1032 MANGANESE < 1.000 UG/L 50 20 03-03-2022 108 2031/03
CA1210015_004_004 SECONDARY/GP-203103 1050 SILVER < 5.000 UG/L 100 10 03-03-2022 108 2031/03
CA1210015_004_004 SECONDARY/GP-203103 1052 SODIUM 4.000 1.000 MG/L 03-03-2022 108 2031/03
CA1210015_004_004 SECONDARY/GP-203108 1064 CONDUCTIVITY @ 25 C UMHOS/CM 230.000 1.000 UMHO/CM 1600 08-17-2022 108 2031/08
CA1210015_004_004 SECONDARY/GP-203103 1055 SULFATE 10.240 1.000 MG/L 500 .5 03-03-2022 108 2031/03
CA1210015_004_004 SECONDARY/GP-203106 1930 TDS 120.000 10.000 MG/L 1000 06-08-2022 108 2031/06
CA1210015_004_004 SECONDARY/GP-203103 1095 ZINC < 5.000 UG/L 5000 50 03-03-2022 108 2031/03
CA1210015_004_004 INORGANIC-203103 1002 ALUMINUM < 50.000 UG/L 1000 50 03-03-2022 108 2031/03
CA1210015_004_004 INORGANIC-203103 1074 ANTIMONY, TOTAL < 1.000 UG/L 6 6 03-03-2022 108 2031/03
CA1210015_004_004 INORGANIC-203103 1005 ARSENIC < 2.000 UG/L 10 2 03-03-2022 108 2031/03
CA1210015_004_004 INORGANIC-202603 1094 ASBESTOS 0.500 0.200 MFL 7 .2 03-29-2017 108 2026/03
CA1210015_004_004 INORGANIC-203103 1010 BARIUM 20.460 1.000 UG/L 1000 100 03-03-2022 108 2031/03
CA1210015_004_004 INORGANIC-203103 1075 BERYLLIUM, TOTAL < 1.000 UG/L 4 1 03-03-2022 108 2031/03
CA1210015_004_004 INORGANIC-203103 1015 CADMIUM < 1.000 UG/L 5 1 03-03-2022 108 2031/03
CA1210015_004_004 INORGANIC-203103 1020 CHROMIUM 2.460 2.000 UG/L 50 10 03-03-2022 108 2031/03
CA1210015_004_004 INORGANIC-203103 1025 FLUORIDE < 0.100 MG/L 2 .1 03-03-2022 108 2031/03
CA1210015_004_004 INORGANIC-203103 1035 MERCURY < 1.000 UG/L 2 1 03-03-2022 108 2031/03
CA1210015_004_004 INORGANIC-203103 1036 NICKEL 14.520 2.000 UG/L 100 10 03-03-2022 108 2031/03
CA1210015_004_004 INORGANIC-202308 1039 PERCHLORATE < 0.500 UG/L 6 2 08-17-2022 12 2023/08 DUE NOW
CA1210015_004_004 INORGANIC-203103 1045 SELENIUM < 5.000 UG/L 50 5 03-03-2022 108 2031/03
CA1210015_004_004 INORGANIC-203103 1085 THALLIUM, TOTAL < 1.000 UG/L 2 1 03-03-2022 108 2031/03
CA1210015_004_004 NITRATE/NITRITE-202306 1040 NITRATE < 0.100 MG/L 10 .4 06-08-2022 12 2023/06 DUE NOW
CA1210015_004_004 NITRATE/NITRITE-202506 1041 NITRITE < 0.100 MG/L 1 .4 06-08-2022 36 2025/06
CA1210015_004_004 RADIOLOGICAL-203103 4109 GROSS ALPHA PARTICLE ACTIVITY < 1.090 PCI/L 15 3 03-03-2022 108 2031/03
CA1210015_004_004 RADIOLOGICAL-202210 4030 RADIUM-228 < 0.200 PCI/L 1 10-03-2013 108 2022/10 DUE NOW
CA1210015_009_009 SECONDARY/GP-203304 1928 ALKALINITY, BICARBONATE 78.000 1.000 MG/L 04-10-2024 108 2033/04
CA1210015_009_009 SECONDARY/GP-203304 1919 CALCIUM 15.000 0.100 MG/L 04-10-2024 108 2033/04
CA1210015_009_009 SECONDARY/GP-203304 1929 ALKALINITY, CARBONATE < 1.000 MG/L 04-10-2024 108 2033/04
CA1210015_009_009 SECONDARY/GP-203304 1017 CHLORIDE 2.200 0.500 MG/L 500 04-10-2024 108 2033/04
CA1210015_009_009 SECONDARY/GP-203304 1022 COPPER, FREE < 5.000 UG/L 1000 50 04-10-2024 108 2033/04
CA1210015_009_009 SECONDARY/GP-202705 2905 FOAMING AGENTS (SURFACTANTS) < 0.100 MG/L .5 05-01-2018 108 2027/05
CA1210015_009_009 SECONDARY/GP-203304 1915 HARDNESS, TOTAL (AS CACO3) 81.000 1.000 MG/L 04-10-2024 108 2033/04
CA1210015_009_009 SECONDARY/GP-203304 1021 HYDROXIDE AS CALCIUM CARBONATE < 1.000 MG/L 04-10-2024 108 2033/04
CA1210015_009_009 SECONDARY/GP-203304 1028 IRON < 50.000 UG/L 300 100 04-10-2024 108 2033/04
CA1210015_009_009 SECONDARY/GP-203304 1031 MAGNESIUM 11.000 0.100 MG/L 04-10-2024 108 2033/04
CA1210015_009_009 SECONDARY/GP-203304 1032 MANGANESE < 1.000 UG/L 50 20 04-10-2024 108 2033/04
CA1210015_009_009 SECONDARY/GP-203304 1050 SILVER < 10.000 UG/L 100 10 04-10-2024 108 2033/04
CA1210015_009_009 SECONDARY/GP-203304 1052 SODIUM 3.500 0.100 MG/L 04-10-2024 108 2033/04
CA1210015_009_009 SECONDARY/GP-203304 1064 CONDUCTIVITY @ 25 C UMHOS/CM 180.000 1.000 UMHO/CM 1600 04-10-2024 108 2033/04
CA1210015_009_009 SECONDARY/GP-203304 1055 SULFATE 9.000 1.000 MG/L 500 .5 04-10-2024 108 2033/04
CA1210015_009_009 SECONDARY/GP-203304 1930 TDS 110.000 10.000 MG/L 1000 04-10-2024 108 2033/04
CA1210015_009_009 SECONDARY/GP-203304 1095 ZINC < 5.000 UG/L 5000 50 04-10-2024 108 2033/04
CA1210015_009_009 INORGANIC-203304 1002 ALUMINUM < 50.000 UG/L 1000 50 04-10-2024 108 2033/04
CA1210015_009_009 INORGANIC-203304 1074 ANTIMONY, TOTAL < 5.000 UG/L 6 6 04-10-2024 108 2033/04
CA1210015_009_009 INORGANIC-203304 1005 ARSENIC < 2.000 UG/L 10 2 04-10-2024 108 2033/04
CA1210015_009_009 INORGANIC-202705 1094 ASBESTOS < 0.200 MFL 7 .2 05-10-2018 108 2027/05
CA1210015_009_009 INORGANIC-203304 1010 BARIUM 18.000 5.000 UG/L 1000 100 04-10-2024 108 2033/04
CA1210015_009_009 INORGANIC-203304 1075 BERYLLIUM, TOTAL < 1.000 UG/L 4 1 04-10-2024 108 2033/04
CA1210015_009_009 INORGANIC-203304 1015 CADMIUM < 1.000 UG/L 5 1 04-10-2024 108 2033/04
CA1210015_009_009 INORGANIC-203304 1020 CHROMIUM < 5.000 UG/L 50 10 04-10-2024 108 2033/04
CA1210015_009_009 INORGANIC-203304 1025 FLUORIDE < 0.100 MG/L 2 .1 04-10-2024 108 2033/04
CA1210015_009_009 INORGANIC-203304 1035 MERCURY < 1.000 UG/L 2 1 04-10-2024 108 2033/04
CA1210015_009_009 INORGANIC-203304 1036 NICKEL 10.000 5.000 UG/L 100 10 04-10-2024 108 2033/04
CA1210015_009_009 INORGANIC-202504 1039 PERCHLORATE < 1.000 UG/L 6 1 04-10-2024 12 2025/04
CA1210015_009_009 INORGANIC-203304 1045 SELENIUM < 5.000 UG/L 50 5 04-10-2024 108 2033/04
CA1210015_009_009 INORGANIC-203304 1085 THALLIUM, TOTAL < 1.000 UG/L 2 1 04-10-2024 108 2033/04
CA1210015_009_009 NITRATE/NITRITE-202504 1040 NITRATE 0.210 0.100 MG/L 10 .4 04-10-2024 12 2025/04
CA1210015_009_009 NITRATE/NITRITE-202704 1041 NITRITE < 0.100 MG/L 1 .4 04-10-2024 36 2027/04
CA1210015_009_009 RADIOLOGICAL-203304 4109 GROSS ALPHA PARTICLE ACTIVITY < 1.040 PCI/L 15 3 04-10-2024 108 2033/04
CA1210015_009_009 RADIOLOGICAL-203304 4030 RADIUM-228 < 0.049 PCI/L 1 04-10-2024 108 2033/04
CA1210015_DST_901 DISINFECTION BYPRODUCTS-202407 2943 BROMODICHLOROMETHANE 2.800 1.000 UG/L 1 07-05-2023 12 2024/07
CA1210015_DST_901 DISINFECTION BYPRODUCTS-202407 2942 BROMOFORM < 1.000 UG/L 1 07-05-2023 12 2024/07
CA1210015_DST_901 DISINFECTION BYPRODUCTS-202407 2941 CHLOROFORM 19.000 1.000 UG/L 1 07-05-2023 12 2024/07
CA1210015_DST_901 DISINFECTION BYPRODUCTS-202407 2454 DIBROMOACETIC ACID < 1.000 UG/L 1 07-05-2023 12 2024/07
CA1210015_DST_901 DISINFECTION BYPRODUCTS-202407 2944 DIBROMOCHLOROMETHANE < 1.000 UG/L 1 07-05-2023 12 2024/07
CA1210015_DST_901 DISINFECTION BYPRODUCTS-202407 2451 DICHLOROACETIC ACID 6.100 1.000 UG/L 1 07-05-2023 12 2024/07
CA1210015_DST_901 DISINFECTION BYPRODUCTS-202407 2456 TOTAL HALOACETIC ACIDS (HAA5) 14.000 6.000 UG/L 60 07-05-2023 12 2024/07
CA1210015_DST_901 DISINFECTION BYPRODUCTS-202407 2453 MONOBROMOACETIC ACID < 1.000 UG/L 1 07-05-2023 12 2024/07
CA1210015_DST_901 DISINFECTION BYPRODUCTS-202407 2450 MONOCHLOROACETIC ACID < 2.000 UG/L 2 07-05-2023 12 2024/07
CA1210015_DST_901 DISINFECTION BYPRODUCTS-202407 2950 TTHM 22.000 4.000 UG/L 80 07-05-2023 12 2024/07
CA1210015_DST_901 DISINFECTION BYPRODUCTS-202407 2452 TRICHLOROACETIC ACID 8.100 1.000 UG/L 1 07-05-2023 12 2024/07
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.