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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

MS0360017 , Yocona Water Association, Inc.

18 of the 57 analytes this system has been tested for have been detected at least once, across 214 samples on record.

The other 39 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 214 samples on record, detections range from September 29, 2003 to July 13, 2026. 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 Yocona Water Association, Inc., 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 57 of 57 results Jul 31, 2007 Nov 12, 2025
Barium 1010 Inorganic Chemical 23 of 23 results Sep 29, 2003 Jul 13, 2026
Lead 1030 Inorganic Chemical 16 of 57 results Jul 31, 2007 Sep 26, 2025
TTHM 2950 Organic Chemical 15 of 16 results Jun 21, 2004 Jun 17, 2026
Nickel 1036 Inorganic Chemical 13 of 22 results Feb 2, 2009 Oct 13, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 12 of 16 results Sep 21, 2009 Jun 17, 2026
Chloroform 2941 Organic Chemical 12 of 12 results Aug 14, 2007 Jun 17, 2026
Bromodichloromethane 2943 Organic Chemical 12 of 12 results Aug 14, 2007 Jun 17, 2026
Dichloroacetic Acid 2451 Organic Chemical 9 of 11 results Sep 21, 2009 Jun 17, 2026
Trichloroacetic Acid 2452 Organic Chemical 9 of 11 results Sep 21, 2009 Jun 17, 2026
Dibromochloromethane 2944 Organic Chemical 8 of 12 results Aug 14, 2007 Jun 17, 2026
Chromium 1020 Inorganic Chemical 8 of 23 results Feb 23, 2004 Jul 23, 2025
Xylenes, Total 2955 Organic Chemical 6 of 48 results Nov 1, 2004 Jan 27, 2010
Fluoride 1025 Inorganic Chemical 5 of 23 results Feb 2, 2009 Jul 13, 2026
Gross Alpha, Incl. Radon & U 4002 Radionuclide 5 of 5 results Dec 12, 2011 Jul 17, 2012
Sodium 1052 Inorganic Chemical 3 of 3 results Sep 23, 2019 Feb 25, 2025
Monobromoacetic Acid 2453 Organic Chemical 1 of 11 results Jun 15, 2020 Jun 15, 2020
Ethylbenzene 2992 Organic Chemical 1 of 48 results Nov 1, 2004 Nov 1, 2004

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 111–120 of 214 samples, newest first — collected December 12, 2011 to July 16, 2012. The summary above covers all 214.

54 results from the 10 samples listed here: 6 detected, 48 not detected. Across the whole record it is 215 of 1,659. 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 Yocona Water Association, Inc., every result from 111 to 120 of 214 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
Jul 16, 2012 12:10
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
120717-117
Laboratory
Radiation Safety Engineering
0.4 pci/l , sample collected Jul 16, 2012 12:10, sampling point TF102 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.29 pci/l Minimum Reporting Level , sample collected Jul 16, 2012 12:10, sampling point TF102 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.233 pci/l Minimum Reporting Level , sample collected Jul 16, 2012 12:10, sampling point TF102 Radium-226 4020 EPA method 903.1 Jul 1, 2012 – Sep 30, 2012
Not detected below 0.29 pci/l Minimum Reporting Level , sample collected Jul 16, 2012 12:10, sampling point TF102 Radium-228 4030 EPA method 904.0 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 16, 2012 12:25
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
120717-117RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 16, 2012 12:25, sampling point TF102 Combined Uranium 4006 EPA method 200.8 Jul 1, 2012 – Sep 30, 2012
Collected
May 23, 2012 01:00
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
120524-014VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 23, 2012 01:00, sampling point TF102 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 23, 2012 01:00, sampling point TF102 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 23, 2012 01:00, sampling point TF102 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 23, 2012 01:00, sampling point TF102 Dichloromethane 2964 EPA method 524.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 23, 2012 01:00, sampling point TF102 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 23, 2012 01:00, sampling point TF102 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 23, 2012 01:00, sampling point TF102 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 23, 2012 01:00, sampling point TF102 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 23, 2012 01:00, sampling point TF102 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 23, 2012 01:00, sampling point TF102 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 23, 2012 01:00, sampling point TF102 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 23, 2012 01:00, sampling point TF102 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 23, 2012 01:00, sampling point TF102 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 23, 2012 01:00, sampling point TF102 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 23, 2012 01:00, sampling point TF102 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 23, 2012 01:00, sampling point TF102 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 23, 2012 01:00, sampling point TF102 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 23, 2012 01:00, sampling point TF102 Benzene 2990 EPA method 524.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 23, 2012 01:00, sampling point TF102 Toluene 2991 EPA method 524.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 23, 2012 01:00, sampling point TF102 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 23, 2012 01:00, sampling point TF102 Styrene 2996 EPA method 524.2 Jan 1, 2012 – Dec 31, 2012
Collected
May 2, 2012 12:15
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
120503-006IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 2, 2012 12:15, sampling point TF102 Arsenic 1005 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.02599 mg/l , sample collected May 2, 2012 12:15, sampling point TF102 Barium 1010 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 2, 2012 12:15, sampling point TF102 Cadmium 1015 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.00112 mg/l , sample collected May 2, 2012 12:15, sampling point TF102 Chromium 1020 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected May 2, 2012 12:15, sampling point TF102 Fluoride 1025 EPA method 380-75WE Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 2, 2012 12:15, sampling point TF102 Mercury 1035 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 2, 2012 12:15, sampling point TF102 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected May 2, 2012 12:15, sampling point TF102 Selenium 1045 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 2, 2012 12:15, sampling point TF102 Antimony, Total 1074 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 2, 2012 12:15, sampling point TF102 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 2, 2012 12:15, sampling point TF102 Thallium, Total 1085 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Collected
Apr 23, 2012 12:30
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
120424-144
Laboratory
Radiation Safety Engineering
0.4 pci/l , sample collected Apr 23, 2012 12:30, sampling point TF102 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.29 pci/l Minimum Reporting Level , sample collected Apr 23, 2012 12:30, sampling point TF102 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.233 pci/l Minimum Reporting Level , sample collected Apr 23, 2012 12:30, sampling point TF102 Radium-226 4020 EPA method 903.1 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.29 pci/l Minimum Reporting Level , sample collected Apr 23, 2012 12:30, sampling point TF102 Radium-228 4030 EPA method 904.0 Apr 1, 2012 – Jun 30, 2012
Collected
Apr 23, 2012 13:00
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
120424-144RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 23, 2012 13:00, sampling point TF102 Combined Uranium 4006 EPA method 200.8 Apr 1, 2012 – Jun 30, 2012
Collected
Feb 20, 2012 02:00
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
120221-023NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 20, 2012 02:00, sampling point TF102 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Feb 20, 2012 02:00, sampling point TF102 Nitrate 1040 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 20, 2012 02:00, sampling point TF102 Nitrite 1041 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Collected
Feb 13, 2012 12:10
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
120214-136
Laboratory
Radiation Safety Engineering
0.4 pci/l , sample collected Feb 13, 2012 12:10, sampling point TF102 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.29 pci/l Minimum Reporting Level , sample collected Feb 13, 2012 12:10, sampling point TF102 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.233 pci/l Minimum Reporting Level , sample collected Feb 13, 2012 12:10, sampling point TF102 Radium-226 4020 EPA method 903.1 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.29 pci/l Minimum Reporting Level , sample collected Feb 13, 2012 12:10, sampling point TF102 Radium-228 4030 EPA method 904.0 Jan 1, 2012 – Mar 31, 2012
Collected
Feb 13, 2012 12:25
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
120214-136RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 13, 2012 12:25, sampling point TF102 Combined Uranium 4006 EPA method 200.8 Jan 1, 2012 – Mar 31, 2012
Collected
Dec 12, 2011 13:02
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
111213-152
Laboratory
Radiation Safety Engineering
0.4 pci/l , sample collected Dec 12, 2011 13:02, sampling point TF102 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.29 pci/l Minimum Reporting Level , sample collected Dec 12, 2011 13:02, sampling point TF102 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.233 pci/l Minimum Reporting Level , sample collected Dec 12, 2011 13:02, sampling point TF102 Radium-226 4020 EPA method 903.1 Oct 1, 2011 – Dec 31, 2011
Not detected below 0.29 pci/l Minimum Reporting Level , sample collected Dec 12, 2011 13:02, sampling point TF102 Radium-228 4030 EPA method 904.0 Oct 1, 2011 – Dec 31, 2011

Routine (10).