Date:05-19-2024STATE OF CALIFORNIA 
LAST AND NEXT SAMPLE REPORT
SYSTEM NO.:4900521SYSTEM NAME:GILL CREEK MUTUAL WATER COMPANYCOUNTY: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
CA4900521_002_002 NITRATE/NITRITE-202502 1040 NITRATE 0.710 0.400 MG/L 10 .4 02-05-2024 12 2025/02
CA4900521_002_002 NITRATE/NITRITE-202602 1041 NITRITE < 0.400 MG/L 1 .4 02-09-2023 36 2026/02
CA4900521_003_003 SECONDARY/GP-202702 1928 ALKALINITY, BICARBONATE 210.000 5.000 MG/L 02-05-2024 36 2027/02
CA4900521_003_003 SECONDARY/GP-202702 1919 CALCIUM 41.000 1.000 MG/L 02-05-2024 36 2027/02
CA4900521_003_003 SECONDARY/GP-202702 1929 ALKALINITY, CARBONATE < 5.000 MG/L 02-05-2024 36 2027/02
CA4900521_003_003 SECONDARY/GP-202702 1017 CHLORIDE 7.800 0.500 MG/L 500 02-05-2024 36 2027/02
CA4900521_003_003 SECONDARY/GP-202702 1905 COLOR 8.000 5.000 UNITS 15 02-05-2024 36 2027/02
CA4900521_003_003 SECONDARY/GP-202702 1022 COPPER, FREE < 50.000 UG/L 1000 50 02-05-2024 36 2027/02
CA4900521_003_003 SECONDARY/GP-202702 2905 FOAMING AGENTS (SURFACTANTS) < 0.050 MG/L .5 02-05-2024 36 2027/02
CA4900521_003_003 SECONDARY/GP-202702 1915 HARDNESS, TOTAL (AS CACO3) 227.000 5.000 MG/L 02-05-2024 36 2027/02
CA4900521_003_003 SECONDARY/GP-202702 1021 HYDROXIDE AS CALCIUM CARBONATE < 5.000 MG/L 02-05-2024 36 2027/02
CA4900521_003_003 SECONDARY/GP-202702 1028 IRON < 100.000 UG/L 300 100 02-05-2024 36 2027/02
CA4900521_003_003 SECONDARY/GP-202702 1031 MAGNESIUM 30.000 1.000 MG/L 02-05-2024 36 2027/02
CA4900521_003_003 SECONDARY/GP-202702 1032 MANGANESE < 20.000 UG/L 50 20 02-05-2024 36 2027/02
CA4900521_003_003 SECONDARY/GP-202702 1920 ODOR < 1.000 TON 3 1 02-05-2024 36 2027/02
CA4900521_003_003 SECONDARY/GP-202702 1925 PH 7.260 1.680 pH 02-05-2024 36 2027/02
CA4900521_003_003 SECONDARY/GP-202702 1050 SILVER < 10.000 UG/L 100 10 02-05-2024 36 2027/02
CA4900521_003_003 SECONDARY/GP-202702 1052 SODIUM 8.700 1.000 MG/L 02-05-2024 36 2027/02
CA4900521_003_003 SECONDARY/GP-202702 1064 CONDUCTIVITY @ 25 C UMHOS/CM 410.000 20.000 UMHO/CM 1600 02-05-2024 36 2027/02
CA4900521_003_003 SECONDARY/GP-202702 1055 SULFATE 19.000 0.500 MG/L 500 .5 02-05-2024 36 2027/02
CA4900521_003_003 SECONDARY/GP-202702 1930 TDS 250.000 10.000 MG/L 1000 02-05-2024 36 2027/02
CA4900521_003_003 SECONDARY/GP-202702 0100 TURBIDITY 0.350 0.200 NTU 5 .1 02-05-2024 36 2027/02
CA4900521_003_003 SECONDARY/GP-202702 1095 ZINC < 50.000 UG/L 5000 50 02-05-2024 36 2027/02
CA4900521_003_003 INORGANIC-202502 1002 ALUMINUM < 50.000 UG/L 1000 50 02-25-2016 108 2025/02
CA4900521_003_003 INORGANIC-202502 1074 ANTIMONY, TOTAL < 6.000 UG/L 6 6 02-25-2016 108 2025/02
CA4900521_003_003 INORGANIC-202502 1005 ARSENIC < 2.000 UG/L 10 2 02-14-2022 36 2025/02
CA4900521_003_003 INORGANIC-202703 1094 ASBESTOS < 0.200 MFL 7 .2 03-07-2018 108 2027/03
CA4900521_003_003 INORGANIC-202502 1010 BARIUM 190.000 100.000 UG/L 1000 100 02-25-2016 108 2025/02
CA4900521_003_003 INORGANIC-202502 1075 BERYLLIUM, TOTAL < 1.000 UG/L 4 1 02-25-2016 108 2025/02
CA4900521_003_003 INORGANIC-202502 1015 CADMIUM < 1.000 UG/L 5 1 02-25-2016 108 2025/02
CA4900521_003_003 INORGANIC-202502 1020 CHROMIUM < 10.000 UG/L 50 10 02-25-2016 108 2025/02
CA4900521_003_003 INORGANIC-202502 1025 FLUORIDE 0.120 0.100 MG/L 2 .1 02-25-2016 108 2025/02
CA4900521_003_003 INORGANIC-202502 1035 MERCURY < 1.000 UG/L 2 1 02-25-2016 108 2025/02
CA4900521_003_003 INORGANIC-202502 1036 NICKEL < 10.000 UG/L 100 10 02-25-2016 108 2025/02
CA4900521_003_003 INORGANIC-202702 1039 PERCHLORATE < 1.000 UG/L 6 1 02-05-2024 36 2027/02
CA4900521_003_003 INORGANIC-202502 1045 SELENIUM < 5.000 UG/L 50 5 02-25-2016 108 2025/02
CA4900521_003_003 INORGANIC-202502 1085 THALLIUM, TOTAL < 1.000 UG/L 2 1 02-25-2016 108 2025/02
CA4900521_003_003 NITRATE/NITRITE-202502 1040 NITRATE 0.880 0.400 MG/L 10 .4 02-05-2024 12 2025/02
CA4900521_003_003 NITRATE/NITRITE-202602 1041 NITRITE < 0.400 MG/L 1 .4 02-09-2023 36 2026/02
CA4900521_003_003 RADIOLOGICAL-202402 4109 GROSS ALPHA PARTICLE ACTIVITY 0.802 +/- 1.300 1.800 PCI/L 15 3 02-18-2015 108 2024/02 DUE NOW
CA4900521_003_003 REGULATED VOC-202504 2981 1,1,1-TRICHLOROETHANE < 0.500 UG/L 200 .5 04-15-2019 72 2025/04
CA4900521_003_003 REGULATED VOC-202504 2988 1,1,2,2-TETRACHLOROETHANE < 0.500 UG/L 1 .5 04-15-2019 72 2025/04
CA4900521_003_003 REGULATED VOC-202504 2985 1,1,2-TRICHLOROETHANE < 0.500 UG/L 5 .5 04-15-2019 72 2025/04
CA4900521_003_003 REGULATED VOC-202504 2978 1,1-DICHLOROETHANE < 0.500 UG/L 5 .5 04-15-2019 72 2025/04
CA4900521_003_003 REGULATED VOC-202504 2977 1,1-DICHLOROETHYLENE < 0.500 UG/L 6 .5 04-15-2019 72 2025/04
CA4900521_003_003 REGULATED VOC-202504 2378 1,2,4-TRICHLOROBENZENE < 0.500 UG/L 5 .5 04-15-2019 72 2025/04
CA4900521_003_003 REGULATED VOC-202504 2968 O-DICHLOROBENZENE < 0.500 UG/L 600 .5 04-15-2019 72 2025/04
CA4900521_003_003 REGULATED VOC-202504 2980 1,2-DICHLOROETHANE < 0.500 UG/L .5 .5 04-15-2019 72 2025/04
CA4900521_003_003 REGULATED VOC-202504 2983 1,2-DICHLOROPROPANE < 0.500 UG/L 5 .5 04-15-2019 72 2025/04
CA4900521_003_003 REGULATED VOC-202504 2413 1,3-DICHLOROPROPENE < 0.500 UG/L .5 .5 04-15-2019 72 2025/04
CA4900521_003_003 REGULATED VOC-202504 2969 P-DICHLOROBENZENE < 0.500 UG/L 5 .5 04-15-2019 72 2025/04
CA4900521_003_003 REGULATED VOC-202504 2990 BENZENE < 0.500 UG/L 1 .5 04-15-2019 72 2025/04
CA4900521_003_003 REGULATED VOC-202504 2982 CARBON TETRACHLORIDE < 0.500 UG/L .5 .5 04-15-2019 72 2025/04
CA4900521_003_003 REGULATED VOC-202504 2380 CIS-1,2-DICHLOROETHYLENE < 0.500 UG/L 6 .5 04-15-2019 72 2025/04
CA4900521_003_003 REGULATED VOC-202504 2964 DICHLOROMETHANE < 0.500 UG/L 5 .5 04-15-2019 72 2025/04
CA4900521_003_003 REGULATED VOC-202504 2992 ETHYLBENZENE < 0.500 UG/L 300 .5 04-15-2019 72 2025/04
CA4900521_003_003 REGULATED VOC-202502 2251 METHYL TERT-BUTYL ETHER < 3.000 UG/L 13 3 02-14-2022 36 2025/02
CA4900521_003_003 REGULATED VOC-202504 2989 CHLOROBENZENE < 0.500 UG/L 70 .5 04-15-2019 72 2025/04
CA4900521_003_003 REGULATED VOC-202504 2996 STYRENE < 0.500 UG/L 100 .5 04-15-2019 72 2025/04
CA4900521_003_003 REGULATED VOC-202504 2987 TETRACHLOROETHYLENE < 0.500 UG/L 5 .5 04-15-2019 72 2025/04
CA4900521_003_003 REGULATED VOC-202504 2991 TOLUENE < 0.500 UG/L 150 .5 04-15-2019 72 2025/04
CA4900521_003_003 REGULATED VOC-202504 2979 TRANS-1,2-DICHLOROETHYLENE < 0.500 UG/L 10 .5 04-15-2019 72 2025/04
CA4900521_003_003 REGULATED VOC-202504 2984 TRICHLOROETHYLENE < 0.500 UG/L 5 .5 04-15-2019 72 2025/04
CA4900521_003_003 REGULATED VOC-202504 2218 TRICHLOROFLUOROMETHANE < 5.000 UG/L 150 5 04-15-2019 72 2025/04
CA4900521_003_003 REGULATED VOC-202504 2904 TRICHLOROTRIFLUOROETHANE < 10.000 UG/L 1200 10 04-15-2019 72 2025/04
CA4900521_003_003 REGULATED VOC-202504 2976 VINYL CHLORIDE < 0.500 UG/L .5 .5 04-15-2019 72 2025/04
CA4900521_003_003 REGULATED VOC-202504 2955 XYLENES, TOTAL < 0.500 UG/L 1750 0.5 04-15-2019 72 2025/04
CA4900521_003_003 REGULATED SOC-202502 2414 1,2,3-TRICHLOROPROPANE < 0.005 UG/L 0.005 02-14-2022 36 2025/02
CA4900521_003_003 REGULATED SOC-203302 2110 2,4,5-TP < 1.000 UG/L 50 1 02-05-2024 108 2033/02
CA4900521_003_003 REGULATED SOC-203302 2105 2,4-D < 10.000 UG/L 70 10 02-05-2024 108 2033/02
CA4900521_003_003 REGULATED SOC-202502 2050 ATRAZINE < 0.500 UG/L 1 .5 02-14-2022 36 2025/02
CA4900521_003_003 REGULATED SOC-202702 2046 CARBOFURAN < 5.000 UG/L 18 5 02-05-2024 36 2027/02
CA4900521_003_003 REGULATED SOC-202702 2031 DALAPON < 10.000 UG/L 200 10 02-05-2024 36 2027/02
CA4900521_003_003 REGULATED SOC-202702 2041 DINOSEB < 2.000 UG/L 7 2 02-05-2024 36 2027/02
CA4900521_003_003 REGULATED SOC-202702 2032 DIQUAT < 4.000 UG/L 20 4 02-05-2024 36 2027/02
CA4900521_003_003 REGULATED SOC-202702 2033 ENDOTHALL < 45.000 UG/L 100 45 02-05-2024 36 2027/02
CA4900521_003_003 REGULATED SOC-202804 2946 ETHYLENE DIBROMIDE < UG/L .05 .02 04-15-2019 108 2028/04
CA4900521_003_003 REGULATED SOC-202804 2065 HEPTACHLOR < UG/L .01 .01 04-15-2019 108 2028/04
CA4900521_003_003 REGULATED SOC-202804 2067 HEPTACHLOR EPOXIDE < UG/L .01 .01 04-15-2019 108 2028/04
CA4900521_003_003 REGULATED SOC-202804 2010 BHC-GAMMA < 0.200 UG/L .2 .2 04-15-2019 108 2028/04
CA4900521_003_003 REGULATED SOC-202804 2015 METHOXYCHLOR < 10.000 UG/L 30 10 04-15-2019 108 2028/04
CA4900521_003_003 REGULATED SOC-202702 2036 OXAMYL < 20.000 UG/L 50 20 02-05-2024 36 2027/02
CA4900521_003_003 REGULATED SOC-202702 2326 PENTACHLOROPHENOL < 0.200 UG/L 1 .2 02-05-2024 36 2027/02
CA4900521_003_003 REGULATED SOC-202702 2040 PICLORAM < 1.000 UG/L 500 1 02-05-2024 36 2027/02
CA4900521_003_003 REGULATED SOC-202502 2037 SIMAZINE < 1.000 UG/L 4 1 02-14-2022 36 2025/02
CA4900521_003_003 REGULATED SOC-202804 2020 TOXAPHENE < 1.000 UG/L 3 1 04-15-2019 108 2028/04
CA4900521_003_003 GENERAL NON CHAP 15-202702 1927 ALKALINITY, TOTAL 210.000 5.000 MG/L 02-05-2024 36 2027/02
CA4900521_DST_006 DISINFECTION BYPRODUCTS-202305 2456 TOTAL HALOACETIC ACIDS (HAA5) 2.700 UG/L 60 05-04-2020 36 2023/05 DUE NOW
CA4900521_DST_006 DISINFECTION BYPRODUCTS-202305 2950 TTHM 6.620 UG/L 80 05-04-2020 36 2023/05 DUE NOW
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.