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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 101–110 of 214 samples, newest first — collected July 17, 2012 to July 22, 2014. The summary above covers all 214.

68 results from the 10 samples listed here: 10 detected, 58 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 101 to 110 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 22, 2014 08:20
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
140724-007PB
Laboratory
MSDH Lab
0.4288 mg/l , sample collected Jul 22, 2014 08:20, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 22, 2014 08:20, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Collected
Jul 22, 2014 06:03
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
140724-006PB
Laboratory
MSDH Lab
0.2326 mg/l , sample collected Jul 22, 2014 06:03, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 22, 2014 06:03, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Collected
Jun 16, 2014 01:15
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
140617-030VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 16, 2014 01:15, sampling point TF102 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 16, 2014 01:15, sampling point TF102 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 16, 2014 01:15, sampling point TF102 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 16, 2014 01:15, sampling point TF102 Dichloromethane 2964 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 16, 2014 01:15, sampling point TF102 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 16, 2014 01:15, sampling point TF102 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 16, 2014 01:15, sampling point TF102 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 16, 2014 01:15, sampling point TF102 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 16, 2014 01:15, sampling point TF102 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 16, 2014 01:15, sampling point TF102 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 16, 2014 01:15, sampling point TF102 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 16, 2014 01:15, sampling point TF102 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 16, 2014 01:15, sampling point TF102 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 16, 2014 01:15, sampling point TF102 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 16, 2014 01:15, sampling point TF102 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 16, 2014 01:15, sampling point TF102 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 16, 2014 01:15, sampling point TF102 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 16, 2014 01:15, sampling point TF102 Benzene 2990 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 16, 2014 01:15, sampling point TF102 Toluene 2991 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 16, 2014 01:15, sampling point TF102 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 16, 2014 01:15, sampling point TF102 Styrene 2996 EPA method 524.2 Jan 1, 2014 – Dec 31, 2014
Collected
Apr 7, 2014 13:00
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
140408-022NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 7, 2014 13:00, sampling point TF102 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2014 – Dec 31, 2014
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Apr 7, 2014 13:00, sampling point TF102 Nitrate 1040 EPA method QC10107041C Jan 1, 2014 – Dec 31, 2014
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 7, 2014 13:00, sampling point TF102 Nitrite 1041 EPA method QC10107041C Jan 1, 2014 – Dec 31, 2014
Collected
Jun 24, 2013 02:00
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
130625-002TH
Laboratory
MSDH Lab
5.96 ug/l , sample collected Jun 24, 2013 02:00, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 24, 2013 02:00, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
2.47 ug/l , sample collected Jun 24, 2013 02:00, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
1.07 ug/l , sample collected Jun 24, 2013 02:00, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
9.5 ug/l , sample collected Jun 24, 2013 02:00, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2011 – Dec 31, 2013
Collected
Jun 24, 2013 01:30
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
130625-002HA
Laboratory
MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Jun 24, 2013 01:30, sampling point MRT000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.003 mg/l , sample collected Jun 24, 2013 01:30, sampling point MRT000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
0.002 mg/l , sample collected Jun 24, 2013 01:30, sampling point MRT000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jun 24, 2013 01:30, sampling point MRT000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jun 24, 2013 01:30, sampling point MRT000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.005 mg/l , sample collected Jun 24, 2013 01:30, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 Jan 1, 2011 – Dec 31, 2013
Collected
Jun 3, 2013 01:20
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
130604-001VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 01:20, sampling point TF102 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 01:20, sampling point TF102 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 01:20, sampling point TF102 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 01:20, sampling point TF102 Dichloromethane 2964 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 01:20, sampling point TF102 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 01:20, sampling point TF102 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 01:20, sampling point TF102 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 01:20, sampling point TF102 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 01:20, sampling point TF102 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 01:20, sampling point TF102 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 01:20, sampling point TF102 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 01:20, sampling point TF102 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 01:20, sampling point TF102 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 01:20, sampling point TF102 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 01:20, sampling point TF102 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 01:20, sampling point TF102 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 01:20, sampling point TF102 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 01:20, sampling point TF102 Benzene 2990 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 01:20, sampling point TF102 Toluene 2991 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 01:20, sampling point TF102 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 3, 2013 01:20, sampling point TF102 Styrene 2996 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Collected
Feb 18, 2013 01:00
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
130219-007NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 18, 2013 01:00, sampling point TF102 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Feb 18, 2013 01:00, sampling point TF102 Nitrate 1040 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 18, 2013 01:00, sampling point TF102 Nitrite 1041 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Collected
Aug 13, 2012 12:30
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
120814-001CN
Laboratory
MSDH Lab
Not detected below 15 ug/l Minimum Reporting Level , sample collected Aug 13, 2012 12:30, sampling point TF102 Cyanide 1024 EPA method QC10204001X Jan 1, 2011 – Dec 31, 2013
Collected
Jul 17, 2012 13:02
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
201210150028
Laboratory
Radiation Safety Engineering
0.4 pci/l , sample collected Jul 17, 2012 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 Jul 17, 2012 13:02, sampling point TF102 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.233 pci/l Minimum Reporting Level , sample collected Jul 17, 2012 13:02, 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 17, 2012 13:02, sampling point TF102 Radium-228 4030 EPA method 904.0 Jul 1, 2012 – Sep 30, 2012

Routine (10).