Date:05-19-2024STATE OF CALIFORNIA 
LAST AND NEXT SAMPLE REPORT
SYSTEM NO.:2810001SYSTEM NAME:HOWELL MOUNTAIN MUTUAL WATER COMPANYCOUNTY:NAPA 
SOURCE NO.:003SOURCE NAME:WELL 02SOURCE CLASS:CLGPSTATUS: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
CA2810001_003_003 SECONDARY/GP-202507 1928 ALKALINITY, BICARBONATE 60.000 10.000 MG/L 07-20-2022 36 2025/07
CA2810001_003_003 SECONDARY/GP-202410 1919 CALCIUM 8.000 1.000 MG/L 10-20-2021 36 2024/10
CA2810001_003_003 SECONDARY/GP-202507 1929 ALKALINITY, CARBONATE < 10.000 MG/L 07-20-2022 36 2025/07
CA2810001_003_003 SECONDARY/GP-202410 1017 CHLORIDE 4.900 1.000 MG/L 500 10-20-2021 36 2024/10
CA2810001_003_003 SECONDARY/GP-202410 1905 COLOR < 3.000 UNITS 15 10-20-2021 36 2024/10
CA2810001_003_003 SECONDARY/GP-202410 1022 COPPER, FREE < 50.000 UG/L 1000 50 10-20-2021 36 2024/10
CA2810001_003_003 SECONDARY/GP-202410 2905 FOAMING AGENTS (SURFACTANTS) < 0.100 MG/L .5 10-20-2021 36 2024/10
CA2810001_003_003 SECONDARY/GP-202410 1915 HARDNESS, TOTAL (AS CACO3) 44.000 3.000 MG/L 10-20-2021 36 2024/10
CA2810001_003_003 SECONDARY/GP-202507 1021 HYDROXIDE AS CALCIUM CARBONATE < 10.000 MG/L 07-20-2022 36 2025/07
CA2810001_003_003 SECONDARY/GP-202410 1028 IRON < 10.000 UG/L 300 100 10-20-2021 36 2024/10
CA2810001_003_003 SECONDARY/GP-202410 1031 MAGNESIUM 5.800 0.100 MG/L 10-20-2021 36 2024/10
CA2810001_003_003 SECONDARY/GP-202410 1032 MANGANESE < 20.000 UG/L 50 20 10-20-2021 36 2024/10
CA2810001_003_003 SECONDARY/GP-202410 1920 ODOR < 1.000 TON 3 1 10-20-2021 36 2024/10
CA2810001_003_003 SECONDARY/GP-202410 1925 PH 6.200 pH 10-20-2021 36 2024/10
CA2810001_003_003 SECONDARY/GP-202410 1050 SILVER < 10.000 UG/L 100 10 10-20-2021 36 2024/10
CA2810001_003_003 SECONDARY/GP-202410 1052 SODIUM 10.000 1.000 MG/L 10-20-2021 36 2024/10
CA2810001_003_003 SECONDARY/GP-202410 1064 CONDUCTIVITY @ 25 C UMHOS/CM 140.000 10.000 UMHO/CM 1600 10-20-2021 36 2024/10
CA2810001_003_003 SECONDARY/GP-202410 1055 SULFATE 3.300 0.500 MG/L 500 .5 10-20-2021 36 2024/10
CA2810001_003_003 SECONDARY/GP-202410 1930 TDS 140.000 10.000 MG/L 1000 10-20-2021 36 2024/10
CA2810001_003_003 SECONDARY/GP-202410 0100 TURBIDITY 0.100 0.100 NTU 5 .1 10-20-2021 36 2024/10
CA2810001_003_003 SECONDARY/GP-202410 1095 ZINC < 50.000 UG/L 5000 50 10-20-2021 36 2024/10
CA2810001_003_003 INORGANIC-202410 1002 ALUMINUM < 50.000 UG/L 1000 50 10-20-2021 36 2024/10
CA2810001_003_003 INORGANIC-202410 1074 ANTIMONY, TOTAL < 6.000 UG/L 6 6 10-20-2021 36 2024/10
CA2810001_003_003 INORGANIC-202410 1005 ARSENIC 3.000 2.000 UG/L 10 2 10-20-2021 36 2024/10
CA2810001_003_003 INORGANIC-202512 1094 ASBESTOS < 0.200 MFL 7 .2 12-19-2016 108 2025/12
CA2810001_003_003 INORGANIC-202410 1010 BARIUM < 100.000 UG/L 1000 100 10-20-2021 36 2024/10
CA2810001_003_003 INORGANIC-202410 1075 BERYLLIUM, TOTAL < 1.000 UG/L 4 1 10-20-2021 36 2024/10
CA2810001_003_003 INORGANIC-202410 1015 CADMIUM < 1.000 UG/L 5 1 10-20-2021 36 2024/10
CA2810001_003_003 INORGANIC-202410 1020 CHROMIUM < 10.000 UG/L 50 10 10-20-2021 36 2024/10
CA2810001_003_003 INORGANIC-202410 1025 FLUORIDE 0.110 0.100 MG/L 2 .1 10-20-2021 36 2024/10
CA2810001_003_003 INORGANIC-202410 1035 MERCURY < 1.000 UG/L 2 1 10-20-2021 36 2024/10
CA2810001_003_003 INORGANIC-202410 1036 NICKEL < 10.000 UG/L 100 10 10-20-2021 36 2024/10
CA2810001_003_003 INORGANIC-202506 1039 PERCHLORATE < 2.000 UG/L 6 2 06-22-2022 36 2025/06
CA2810001_003_003 INORGANIC-202410 1045 SELENIUM < 5.000 UG/L 50 5 10-20-2021 36 2024/10
CA2810001_003_003 INORGANIC-202410 1085 THALLIUM, TOTAL < 1.000 UG/L 2 1 10-20-2021 36 2024/10
CA2810001_003_003 NITRATE/NITRITE-202412 1040 NITRATE < 0.400 MG/L 10 .4 12-07-2023 12 2024/12
CA2810001_003_003 NITRATE/NITRITE-202504 1041 NITRITE < 0.400 MG/L 1 .4 04-19-2022 36 2025/04
CA2810001_003_003 RADIOLOGICAL-202806 4109 GROSS ALPHA PARTICLE ACTIVITY < 0.900 PCI/L 15 3 06-11-2019 108 2028/06
CA2810001_003_003 REGULATED VOC-202707 2981 1,1,1-TRICHLOROETHANE < 0.500 UG/L 200 .5 07-28-2021 72 2027/07
CA2810001_003_003 REGULATED VOC-202707 2988 1,1,2,2-TETRACHLOROETHANE < 0.500 UG/L 1 .5 07-28-2021 72 2027/07
CA2810001_003_003 REGULATED VOC-202707 2985 1,1,2-TRICHLOROETHANE < 0.500 UG/L 5 .5 07-28-2021 72 2027/07
CA2810001_003_003 REGULATED VOC-202707 2978 1,1-DICHLOROETHANE < 0.500 UG/L 5 .5 07-28-2021 72 2027/07
CA2810001_003_003 REGULATED VOC-202707 2977 1,1-DICHLOROETHYLENE < 0.500 UG/L 6 .5 07-28-2021 72 2027/07
CA2810001_003_003 REGULATED VOC-202707 2378 1,2,4-TRICHLOROBENZENE < 0.500 UG/L 5 .5 07-28-2021 72 2027/07
CA2810001_003_003 REGULATED VOC-202707 2968 O-DICHLOROBENZENE < 0.500 UG/L 600 .5 07-28-2021 72 2027/07
CA2810001_003_003 REGULATED VOC-202707 2980 1,2-DICHLOROETHANE < 0.500 UG/L .5 .5 07-28-2021 72 2027/07
CA2810001_003_003 REGULATED VOC-202707 2983 1,2-DICHLOROPROPANE < 0.500 UG/L 5 .5 07-28-2021 72 2027/07
CA2810001_003_003 REGULATED VOC-202707 2413 1,3-DICHLOROPROPENE < 0.500 UG/L .5 .5 07-28-2021 72 2027/07
CA2810001_003_003 REGULATED VOC-202707 2969 P-DICHLOROBENZENE < 0.500 UG/L 5 .5 07-28-2021 72 2027/07
CA2810001_003_003 REGULATED VOC-202707 2990 BENZENE < 0.500 UG/L 1 .5 07-28-2021 72 2027/07
CA2810001_003_003 REGULATED VOC-202707 2982 CARBON TETRACHLORIDE < 0.500 UG/L .5 .5 07-28-2021 72 2027/07
CA2810001_003_003 REGULATED VOC-202707 2380 CIS-1,2-DICHLOROETHYLENE < 0.500 UG/L 6 .5 07-28-2021 72 2027/07
CA2810001_003_003 REGULATED VOC-202707 2964 DICHLOROMETHANE < 0.500 UG/L 5 .5 07-28-2021 72 2027/07
CA2810001_003_003 REGULATED VOC-202707 2992 ETHYLBENZENE < 0.500 UG/L 300 .5 07-28-2021 72 2027/07
CA2810001_003_003 REGULATED VOC-202407 2251 METHYL TERT-BUTYL ETHER < 3.000 UG/L 13 3 07-28-2021 36 2024/07
CA2810001_003_003 REGULATED VOC-202707 2989 CHLOROBENZENE < 0.500 UG/L 70 .5 07-28-2021 72 2027/07
CA2810001_003_003 REGULATED VOC-202707 2996 STYRENE < 0.500 UG/L 100 .5 07-28-2021 72 2027/07
CA2810001_003_003 REGULATED VOC-202707 2987 TETRACHLOROETHYLENE < 0.500 UG/L 5 .5 07-28-2021 72 2027/07
CA2810001_003_003 REGULATED VOC-202707 2991 TOLUENE < 0.500 UG/L 150 .5 07-28-2021 72 2027/07
CA2810001_003_003 REGULATED VOC-202707 2979 TRANS-1,2-DICHLOROETHYLENE < 0.500 UG/L 10 .5 07-28-2021 72 2027/07
CA2810001_003_003 REGULATED VOC-202707 2984 TRICHLOROETHYLENE < 0.500 UG/L 5 .5 07-28-2021 72 2027/07
CA2810001_003_003 REGULATED VOC-202707 2218 TRICHLOROFLUOROMETHANE < 5.000 UG/L 150 5 07-28-2021 72 2027/07
CA2810001_003_003 REGULATED VOC-202707 2904 TRICHLOROTRIFLUOROETHANE < 10.000 UG/L 1200 10 07-28-2021 72 2027/07
CA2810001_003_003 REGULATED VOC-202707 2976 VINYL CHLORIDE < 0.500 UG/L .5 .5 07-28-2021 72 2027/07
CA2810001_003_003 REGULATED VOC-202707 2955 XYLENES, TOTAL < 0.500 UG/L 1750 0.5 07-28-2021 72 2027/07
CA2810001_003_003 REGULATED SOC-202412 2414 1,2,3-TRICHLOROPROPANE < 0.005 UG/L 0.005 12-22-2021 36 2024/12
CA2810001_003_003 REGULATED SOC-202512 2110 2,4,5-TP < 1.000 UG/L 50 1 12-19-2016 108 2025/12
CA2810001_003_003 REGULATED SOC-202512 2105 2,4-D < 10.000 UG/L 70 10 12-19-2016 108 2025/12
CA2810001_003_003 REGULATED SOC-202410 2050 ATRAZINE < 0.050 UG/L 1 .5 10-28-2021 36 2024/10
CA2810001_003_003 REGULATED SOC-202512 2031 DALAPON < 10.000 UG/L 200 10 12-19-2016 108 2025/12
CA2810001_003_003 REGULATED SOC-202410 2037 SIMAZINE < 0.050 UG/L 4 1 10-28-2021 36 2024/10
CA2810001_003_003 GENERAL NON CHAP 15-202507 1927 ALKALINITY, TOTAL 60.000 10.000 MG/L 07-20-2022 36 2025/07
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.