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This is a rebuild of Drinking Water Watch and not yet the official record. Use the agency’s current Drinking Water Watch for anything you need to rely on.

Chemical and radiological sample results

MS0690053 , Hidden Valley Light Assn

27 of the 61 analytes this system has been tested for have been detected at least once, across 123 samples on record.

The other 34 were tested for and never found. An analyte is counted here if any result on record measured it, so this covers the whole history and not the samples listed below.

Across all 123 samples on record, detections range from June 15, 2011 to March 31, 2025. These figures cover the whole record.

What counts as a non-detect is defined in the help: Less than Indicator. This system’s violations.

What has been detected, ever

Every analyte measured above its reporting level at any point in this system’s record, most often detected first. This is not limited to the samples listed below.

Every analyte ever detected for Hidden Valley Light Assn, with how many results found it and when it was first and last detected. Covers the whole record, not only the samples listed below.
Analyte Kind Detected in First detected Last detected
Copper, Free 1022 Inorganic Chemical 55 of 55 results Jun 15, 2011 Aug 3, 2023
Lead 1030 Inorganic Chemical 48 of 55 results Jun 15, 2011 Aug 3, 2023
Barium 1010 Inorganic Chemical 5 of 5 results May 20, 2013 Mar 31, 2025
Mercury 1035 Inorganic Chemical 5 of 5 results May 20, 2013 Mar 31, 2025
Nickel 1036 Inorganic Chemical 5 of 5 results May 20, 2013 Mar 31, 2025
Gross Alpha, Incl. Radon & U 4002 Radionuclide 5 of 5 results Dec 12, 2011 Jul 17, 2012
Combined Radium (-226 & -228) 4010 Radionuclide 5 of 5 results Dec 12, 2011 Jul 17, 2012
Radium-226 4020 Radionuclide 5 of 5 results Dec 12, 2011 Jul 17, 2012
Chromium 1020 Inorganic Chemical 4 of 5 results May 20, 2013 Mar 31, 2025
Sodium 1052 Inorganic Chemical 3 of 3 results Sep 24, 2019 Nov 13, 2023
Fluoride 1025 Inorganic Chemical 2 of 6 results May 19, 2021 Mar 31, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 2 of 6 results Aug 8, 2011 Feb 26, 2025
TTHM 2950 Organic Chemical 2 of 6 results Aug 8, 2011 Feb 26, 2025
Nitrate-Nitrite 1038 Inorganic Chemical 1 of 15 results Oct 31, 2023 Oct 31, 2023
Nitrate 1040 Inorganic Chemical 1 of 15 results Oct 31, 2023 Oct 31, 2023
Calcium 1016 Inorganic Chemical 1 of 1 result May 19, 2021 May 19, 2021
Chloride 1017 Inorganic Chemical 1 of 1 result May 19, 2021 May 19, 2021
Sulfate 1055 Inorganic Chemical 1 of 1 result May 19, 2021 May 19, 2021
Conductivity @ 25 C Umhos/CM 1064 Water Quality 1 of 1 result May 19, 2021 May 19, 2021
Alkalinity, Total 1927 Water Quality 1 of 1 result May 19, 2021 May 19, 2021
Dichloroacetic Acid 2451 Organic Chemical 1 of 4 results Aug 8, 2011 Aug 8, 2011
Trichloroacetic Acid 2452 Organic Chemical 1 of 4 results Aug 8, 2011 Aug 8, 2011
Dibromoacetic Acid 2454 Organic Chemical 1 of 4 results Aug 8, 2011 Aug 8, 2011
Chloroform 2941 Organic Chemical 1 of 4 results Aug 8, 2011 Aug 8, 2011
Bromoform 2942 Organic Chemical 1 of 4 results Aug 8, 2011 Aug 8, 2011
Bromodichloromethane 2943 Organic Chemical 1 of 4 results Aug 8, 2011 Aug 8, 2011
Dibromochloromethane 2944 Organic Chemical 1 of 4 results Aug 8, 2011 Aug 8, 2011

No date range is applied: this list draws on every sample on record. Show the last two years only.

The most recent samples, result by result

The table below lists 101–110 of 123 samples, newest first — collected October 24, 2011 to February 13, 2012. The summary above covers all 123.

40 results from the 10 samples listed here: 17 detected, 23 not detected. Across the whole record it is 160 of 695. A sample is analysed for many analytes at once, so one sample appears on as many rows as it had results.

Chemical and radiological sample results for Hidden Valley Light Assn, every result from 101 to 110 of 123 samples shown, newest first. Not detected means the amount was below the level the laboratory can reliably report, which is given beside it.
Result Analyte Monitoring period
Collected
Feb 13, 2012
Sampling point
DS000
Sample type
Routine
Lab sample
120215-011PB
Laboratory
MSDH Lab
0.1048 mg/l , sample collected Feb 13, 2012, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2012 – Jun 30, 2012
0.0051 mg/l , sample collected Feb 13, 2012, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Jun 30, 2012
Collected
Feb 13, 2012
Sampling point
DS000
Sample type
Routine
Lab sample
120215-009PB
Laboratory
MSDH Lab
0.1992 mg/l , sample collected Feb 13, 2012, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2012 – Jun 30, 2012
0.0026 mg/l , sample collected Feb 13, 2012, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Jun 30, 2012
Collected
Feb 13, 2012
Sampling point
DS000
Sample type
Routine
Lab sample
120215-008PB
Laboratory
MSDH Lab
0.0713 mg/l , sample collected Feb 13, 2012, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2012 – Jun 30, 2012
0.0008 mg/l , sample collected Feb 13, 2012, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Jun 30, 2012
Collected
Feb 13, 2012
Sampling point
DS000
Sample type
Routine
Lab sample
120215-007PB
Laboratory
MSDH Lab
0.323 mg/l , sample collected Feb 13, 2012, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2012 – Jun 30, 2012
0.0268 mg/l , sample collected Feb 13, 2012, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Jun 30, 2012
Collected
Feb 13, 2012 13:00
Sampling point
WL001 Well 001
Sample type
Routine
Lab sample
120214-132RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 13, 2012 13:00, sampling point WL001 Combined Uranium 4006 EPA method 200.8 Jan 1, 2012 – Mar 31, 2012
Collected
Feb 1, 2012 01:40
Sampling point
WL001 Well 001
Sample type
Routine
Lab sample
120202-014VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 1, 2012 01:40, sampling point WL001 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 1, 2012 01:40, sampling point WL001 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 1, 2012 01:40, sampling point WL001 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 1, 2012 01:40, sampling point WL001 Dichloromethane 2964 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 1, 2012 01:40, sampling point WL001 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 1, 2012 01:40, sampling point WL001 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 1, 2012 01:40, sampling point WL001 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 1, 2012 01:40, sampling point WL001 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 1, 2012 01:40, sampling point WL001 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 1, 2012 01:40, sampling point WL001 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 1, 2012 01:40, sampling point WL001 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 1, 2012 01:40, sampling point WL001 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 1, 2012 01:40, sampling point WL001 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 1, 2012 01:40, sampling point WL001 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 1, 2012 01:40, sampling point WL001 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 1, 2012 01:40, sampling point WL001 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 1, 2012 01:40, sampling point WL001 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 1, 2012 01:40, sampling point WL001 Benzene 2990 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 1, 2012 01:40, sampling point WL001 Toluene 2991 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 1, 2012 01:40, sampling point WL001 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 1, 2012 01:40, sampling point WL001 Styrene 2996 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Collected
Dec 12, 2011 13:45
Sampling point
WL001 Well 001
Sample type
Routine
Lab sample
111213-153
Laboratory
Radiation Safety Engineering
1.1 pci/l , sample collected Dec 12, 2011 13:45, sampling point WL001 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
0.5 pci/l , sample collected Dec 12, 2011 13:45, sampling point WL001 Combined Radium (-226 & -228) 4010 Not recorded
0.5 pci/l , sample collected Dec 12, 2011 13:45, sampling point WL001 Radium-226 4020 EPA method 903.1 Oct 1, 2011 – Dec 31, 2011
Not detected below 0.26 pci/l Minimum Reporting Level , sample collected Dec 12, 2011 13:45, sampling point WL001 Radium-228 4030 EPA method 904.0 Oct 1, 2011 – Dec 31, 2011
Collected
Oct 25, 2011
Sampling point
DS000
Sample type
Routine
Lab sample
111027-023PB
Laboratory
MSDH Lab
0.0783 mg/l , sample collected Oct 25, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jul 1, 2011 – Dec 31, 2011
0.0048 mg/l , sample collected Oct 25, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jul 1, 2011 – Dec 31, 2011
Collected
Oct 25, 2011
Sampling point
DS000
Sample type
Routine
Lab sample
111027-022PB
Laboratory
MSDH Lab
0.1037 mg/l , sample collected Oct 25, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jul 1, 2011 – Dec 31, 2011
0.0018 mg/l , sample collected Oct 25, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jul 1, 2011 – Dec 31, 2011
Collected
Oct 24, 2011
Sampling point
DS000
Sample type
Routine
Lab sample
111027-021PB
Laboratory
MSDH Lab
0.4715 mg/l , sample collected Oct 24, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jul 1, 2011 – Dec 31, 2011
0.0142 mg/l , sample collected Oct 24, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jul 1, 2011 – Dec 31, 2011

Routine (10).