Date:05-16-2024STATE OF CALIFORNIA 
LAST AND NEXT SAMPLE REPORT
SYSTEM NO.:2810004SYSTEM NAME:ST. HELENA, CITY OFCOUNTY:NAPA 
SOURCE NO.:002SOURCE NAME:BELL CANYON RESERVOIR INTAKESOURCE CLASS:CLSASTATUS: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
CA2810004_002_002 SECONDARY/GP-202503 1928 ALKALINITY, BICARBONATE 26.000 5.000 MG/L 03-25-2024 12 2025/03
CA2810004_002_002 SECONDARY/GP-202502 1919 CALCIUM 5.100 1.000 MG/L 02-22-2024 12 2025/02
CA2810004_002_002 SECONDARY/GP-202503 1929 ALKALINITY, CARBONATE < 5.000 MG/L 03-25-2024 12 2025/03
CA2810004_002_002 SECONDARY/GP-202502 1017 CHLORIDE 4.000 0.500 MG/L 500 02-22-2024 12 2025/02
CA2810004_002_002 SECONDARY/GP-202306 1905 COLOR < 50.000 UNITS 15 06-27-2022 12 2023/06 DUE NOW
CA2810004_002_002 SECONDARY/GP-202502 1022 COPPER, FREE < 50.000 UG/L 1000 50 02-22-2024 12 2025/02
CA2810004_002_002 SECONDARY/GP-202502 2905 FOAMING AGENTS (SURFACTANTS) < 0.050 MG/L .5 02-22-2024 12 2025/02
CA2810004_002_002 SECONDARY/GP-202502 1915 HARDNESS, TOTAL (AS CACO3) 21.000 5.000 MG/L 02-22-2024 12 2025/02
CA2810004_002_002 SECONDARY/GP-202503 1021 HYDROXIDE AS CALCIUM CARBONATE < 5.000 MG/L 03-25-2024 12 2025/03
CA2810004_002_002 SECONDARY/GP-202503 1028 IRON 210.000 100.000 UG/L 300 100 03-25-2024 12 2025/03
CA2810004_002_002 SECONDARY/GP-202502 1031 MAGNESIUM 2.000 1.000 MG/L 02-22-2024 12 2025/02
CA2810004_002_002 SECONDARY/GP-202503 1032 MANGANESE < 20.000 UG/L 50 20 03-25-2024 12 2025/03
CA2810004_002_002 SECONDARY/GP-202503 1920 ODOR 10.000 1.000 TON 3 1 03-25-2024 12 2025/03
CA2810004_002_002 SECONDARY/GP-202502 1925 PH 7.090 1.680 pH 02-22-2024 12 2025/02
CA2810004_002_002 SECONDARY/GP-202502 1050 SILVER < 10.000 UG/L 100 10 02-22-2024 12 2025/02
CA2810004_002_002 SECONDARY/GP-202502 1052 SODIUM 5.200 1.000 MG/L 02-22-2024 12 2025/02
CA2810004_002_002 SECONDARY/GP-202502 1064 CONDUCTIVITY @ 25 C UMHOS/CM 76.000 20.000 UMHO/CM 1600 02-22-2024 12 2025/02
CA2810004_002_002 SECONDARY/GP-202502 1055 SULFATE 3.900 0.500 MG/L 500 .5 02-22-2024 12 2025/02
CA2810004_002_002 SECONDARY/GP-202502 1930 TDS 70.000 10.000 MG/L 1000 02-22-2024 12 2025/02
CA2810004_002_002 SECONDARY/GP-202503 0100 TURBIDITY 2.300 0.200 NTU 5 .1 03-12-2024 12 2025/03
CA2810004_002_002 SECONDARY/GP-202502 1095 ZINC < 50.000 UG/L 5000 50 02-22-2024 12 2025/02
CA2810004_002_002 INORGANIC-202503 1002 ALUMINUM 180.000 50.000 UG/L 1000 50 03-25-2024 12 2025/03
CA2810004_002_002 INORGANIC-202503 1074 ANTIMONY, TOTAL < 6.000 UG/L 6 6 03-12-2024 12 2025/03
CA2810004_002_002 INORGANIC-202503 1005 ARSENIC < 2.000 UG/L 10 2 03-12-2024 12 2025/03
CA2810004_002_002 INORGANIC-202410 1094 ASBESTOS < 0.200 MFL 7 .2 10-14-2015 108 2024/10
CA2810004_002_002 INORGANIC-202503 1010 BARIUM < 100.000 UG/L 1000 100 03-12-2024 12 2025/03
CA2810004_002_002 INORGANIC-202503 1075 BERYLLIUM, TOTAL < 1.000 UG/L 4 1 03-12-2024 12 2025/03
CA2810004_002_002 INORGANIC-202503 1015 CADMIUM < 1.000 UG/L 5 1 03-12-2024 12 2025/03
CA2810004_002_002 INORGANIC-202503 1020 CHROMIUM < 10.000 UG/L 50 10 03-12-2024 12 2025/03
CA2810004_002_002 INORGANIC-202503 1025 FLUORIDE < 0.100 MG/L 2 .1 03-12-2024 12 2025/03
CA2810004_002_002 INORGANIC-202503 1035 MERCURY < 1.000 UG/L 2 1 03-12-2024 12 2025/03
CA2810004_002_002 INORGANIC-202503 1036 NICKEL < 10.000 UG/L 100 10 03-12-2024 12 2025/03
CA2810004_002_002 INORGANIC-202502 1039 PERCHLORATE < 1.000 UG/L 6 1 02-22-2024 12 2025/02
CA2810004_002_002 INORGANIC-202503 1045 SELENIUM < 5.000 UG/L 50 5 03-12-2024 12 2025/03
CA2810004_002_002 INORGANIC-202503 1085 THALLIUM, TOTAL < 1.000 UG/L 2 1 03-12-2024 12 2025/03
CA2810004_002_002 NITRATE/NITRITE-202503 1040 NITRATE < 0.400 MG/L 10 .4 03-12-2024 12 2025/03
CA2810004_002_002 NITRATE/NITRITE-202703 1041 NITRITE < 0.400 MG/L 1 .4 03-12-2024 36 2027/03
CA2810004_002_002 RADIOLOGICAL-202611 4109 GROSS ALPHA PARTICLE ACTIVITY 0.079 +/- 0.556 0.900 PCI/L 15 3 11-29-2017 108 2026/11
CA2810004_002_002 REGULATED VOC-202702 2981 1,1,1-TRICHLOROETHANE < 0.500 UG/L 200 .5 02-22-2024 36 2027/02
CA2810004_002_002 REGULATED VOC-202702 2988 1,1,2,2-TETRACHLOROETHANE < 0.500 UG/L 1 .5 02-22-2024 36 2027/02
CA2810004_002_002 REGULATED VOC-202702 2985 1,1,2-TRICHLOROETHANE < 0.500 UG/L 5 .5 02-22-2024 36 2027/02
CA2810004_002_002 REGULATED VOC-202702 2978 1,1-DICHLOROETHANE < 0.500 UG/L 5 .5 02-22-2024 36 2027/02
CA2810004_002_002 REGULATED VOC-202702 2977 1,1-DICHLOROETHYLENE < 0.500 UG/L 6 .5 02-22-2024 36 2027/02
CA2810004_002_002 REGULATED VOC-202702 2378 1,2,4-TRICHLOROBENZENE < 0.500 UG/L 5 .5 02-22-2024 36 2027/02
CA2810004_002_002 REGULATED VOC-202702 2968 O-DICHLOROBENZENE < 0.500 UG/L 600 .5 02-22-2024 36 2027/02
CA2810004_002_002 REGULATED VOC-202702 2980 1,2-DICHLOROETHANE < 0.500 UG/L .5 .5 02-22-2024 36 2027/02
CA2810004_002_002 REGULATED VOC-202702 2983 1,2-DICHLOROPROPANE < 0.500 UG/L 5 .5 02-22-2024 36 2027/02
CA2810004_002_002 REGULATED VOC-202702 2413 1,3-DICHLOROPROPENE < 0.500 UG/L .5 .5 02-22-2024 36 2027/02
CA2810004_002_002 REGULATED VOC-202702 2969 P-DICHLOROBENZENE < 0.500 UG/L 5 .5 02-22-2024 36 2027/02
CA2810004_002_002 REGULATED VOC-202702 2990 BENZENE < 0.500 UG/L 1 .5 02-22-2024 36 2027/02
CA2810004_002_002 REGULATED VOC-202702 2982 CARBON TETRACHLORIDE < 0.500 UG/L .5 .5 02-22-2024 36 2027/02
CA2810004_002_002 REGULATED VOC-202702 2380 CIS-1,2-DICHLOROETHYLENE < 0.500 UG/L 6 .5 02-22-2024 36 2027/02
CA2810004_002_002 REGULATED VOC-202702 2964 DICHLOROMETHANE < 0.500 UG/L 5 .5 02-22-2024 36 2027/02
CA2810004_002_002 REGULATED VOC-202702 2992 ETHYLBENZENE < 0.500 UG/L 300 .5 02-22-2024 36 2027/02
CA2810004_002_002 REGULATED VOC-202702 2251 METHYL TERT-BUTYL ETHER < 3.000 UG/L 13 3 02-22-2024 36 2027/02
CA2810004_002_002 REGULATED VOC-202702 2989 CHLOROBENZENE < 0.500 UG/L 70 .5 02-22-2024 36 2027/02
CA2810004_002_002 REGULATED VOC-202702 2996 STYRENE < 0.500 UG/L 100 .5 02-22-2024 36 2027/02
CA2810004_002_002 REGULATED VOC-202702 2987 TETRACHLOROETHYLENE < 0.500 UG/L 5 .5 02-22-2024 36 2027/02
CA2810004_002_002 REGULATED VOC-202702 2991 TOLUENE < 0.500 UG/L 150 .5 02-22-2024 36 2027/02
CA2810004_002_002 REGULATED VOC-202702 2979 TRANS-1,2-DICHLOROETHYLENE < 0.500 UG/L 10 .5 02-22-2024 36 2027/02
CA2810004_002_002 REGULATED VOC-202702 2984 TRICHLOROETHYLENE < 0.500 UG/L 5 .5 02-22-2024 36 2027/02
CA2810004_002_002 REGULATED VOC-202702 2218 TRICHLOROFLUOROMETHANE < 5.000 UG/L 150 5 02-22-2024 36 2027/02
CA2810004_002_002 REGULATED VOC-202702 2904 TRICHLOROTRIFLUOROETHANE < 10.000 UG/L 1200 10 02-22-2024 36 2027/02
CA2810004_002_002 REGULATED VOC-202702 2976 VINYL CHLORIDE < 0.500 UG/L .5 .5 02-22-2024 36 2027/02
CA2810004_002_002 REGULATED VOC-202702 2955 XYLENES, TOTAL < 0.500 UG/L 1750 0.5 02-22-2024 36 2027/02
CA2810004_002_002 REGULATED SOC-202505 2414 1,2,3-TRICHLOROPROPANE < 0.005 UG/L 0.005 05-10-2022 36 2025/05
CA2810004_002_002 REGULATED SOC-203105 2110 2,4,5-TP < 1.000 UG/L 50 1 05-10-2022 108 2031/05
CA2810004_002_002 REGULATED SOC-203105 2105 2,4-D < 10.000 UG/L 70 10 05-10-2022 108 2031/05
CA2810004_002_002 REGULATED SOC-202505 2050 ATRAZINE < 0.100 UG/L 1 .5 05-10-2022 36 2025/05
CA2810004_002_002 REGULATED SOC-202505 2046 CARBOFURAN < 5.000 UG/L 18 5 05-10-2022 36 2025/05
CA2810004_002_002 REGULATED SOC-202505 2031 DALAPON < 10.000 UG/L 200 10 05-10-2022 36 2025/05
CA2810004_002_002 REGULATED SOC-202505 2041 DINOSEB < 2.000 UG/L 7 2 05-10-2022 36 2025/05
CA2810004_002_002 REGULATED SOC-202505 2032 DIQUAT < 4.000 UG/L 20 4 05-10-2022 36 2025/05
CA2810004_002_002 REGULATED SOC-202505 2033 ENDOTHALL < 45.000 UG/L 100 45 05-10-2022 36 2025/05
CA2810004_002_002 REGULATED SOC-202604 2946 ETHYLENE DIBROMIDE < UG/L .05 .02 04-14-2017 108 2026/04
CA2810004_002_002 REGULATED SOC-202503 2034 GLYPHOSATE < 5.000 UG/L 700 25 03-25-2024 12 2025/03
CA2810004_002_002 REGULATED SOC-203105 2065 HEPTACHLOR < 0.010 UG/L .01 .01 05-10-2022 108 2031/05
CA2810004_002_002 REGULATED SOC-203105 2067 HEPTACHLOR EPOXIDE < 0.010 UG/L .01 .01 05-10-2022 108 2031/05
CA2810004_002_002 REGULATED SOC-203105 2010 BHC-GAMMA < 0.200 UG/L .2 .2 05-10-2022 108 2031/05
CA2810004_002_002 REGULATED SOC-203105 2015 METHOXYCHLOR < 10.000 UG/L 30 10 05-10-2022 108 2031/05
CA2810004_002_002 REGULATED SOC-202505 2036 OXAMYL < 20.000 UG/L 50 20 05-10-2022 36 2025/05
CA2810004_002_002 REGULATED SOC-202505 2326 PENTACHLOROPHENOL < 0.200 UG/L 1 .2 05-10-2022 36 2025/05
CA2810004_002_002 REGULATED SOC-202505 2040 PICLORAM < 1.000 UG/L 500 1 05-10-2022 36 2025/05
CA2810004_002_002 REGULATED SOC-202505 2037 SIMAZINE < 0.100 UG/L 4 1 05-10-2022 36 2025/05
CA2810004_002_002 REGULATED SOC-203105 2020 TOXAPHENE < 1.000 UG/L 3 1 05-10-2022 108 2031/05
CA2810004_002_002 GENERAL NON CHAP 15-202503 1927 ALKALINITY, TOTAL 26.000 5.000 MG/L 03-25-2024 12 2025/03
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.