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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; the list of samples further down is narrowed.

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

Showing samples collected between September 26, 2024 and September 26, 2026. That is this page’s default, not a limit on what the agency records.

Show every sample on record

Choose a date range

The most recent samples, result by result

The table below lists 1–10 of 32 samples, newest first — collected November 11, 2025 to July 13, 2026. The summary above covers all 32.

97 results from the 10 samples listed here: 33 detected, 64 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.

We withheld the location of 6 sampling points below. The location on record identifies a private home, and we do not publish those. That is our decision, not the agency’s. The sampling point, its type and every result taken there are published unchanged.

Chemical and radiological sample results for Yocona Water Association, Inc., every result from 1 to 10 of 32 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 13, 2026
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
35050727001
Laboratory
Pace Analytical Services, LLC
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 13, 2026, sampling point TF102 Arsenic 1005 EPA method 200.8 Jan 1, 2026 – Dec 31, 2028
30.9 ug/l , sample collected Jul 13, 2026, sampling point TF102 Barium 1010 EPA method 200.8 Jan 1, 2026 – Dec 31, 2028
Not detected below 0.2 ug/l Minimum Reporting Level , sample collected Jul 13, 2026, sampling point TF102 Cadmium 1015 EPA method 200.8 Jan 1, 2026 – Dec 31, 2028
Not detected below 2 ug/l Minimum Reporting Level , sample collected Jul 13, 2026, sampling point TF102 Chromium 1020 EPA method 200.8 Jan 1, 2026 – Dec 31, 2028
0.1 mg/l , sample collected Jul 13, 2026, sampling point TF102 Fluoride 1025 EPA method 300.0 Jan 1, 2026 – Dec 31, 2028
Not detected below 0.2 ug/l Minimum Reporting Level , sample collected Jul 13, 2026, sampling point TF102 Mercury 1035 EPA method 245.1 Jan 1, 2026 – Dec 31, 2028
Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Jul 13, 2026, sampling point TF102 Nitrate-Nitrite 1038 Jan 1, 2026 – Dec 31, 2026
Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Jul 13, 2026, sampling point TF102 Nitrate 1040 EPA method 353.2 Jan 1, 2026 – Dec 31, 2026
Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Jul 13, 2026, sampling point TF102 Nitrite 1041 EPA method 353.2 Jan 1, 2026 – Dec 31, 2026
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 13, 2026, sampling point TF102 Selenium 1045 EPA method 200.8 Jan 1, 2026 – Dec 31, 2028
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 13, 2026, sampling point TF102 Antimony, Total 1074 EPA method 200.8 Jan 1, 2026 – Dec 31, 2028
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Jul 13, 2026, sampling point TF102 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2026 – Dec 31, 2028
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 13, 2026, sampling point TF102 Thallium, Total 1085 EPA method 200.8 Jan 1, 2026 – Dec 31, 2028
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 13, 2026, sampling point TF102 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2026 – Dec 31, 2031
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 13, 2026, sampling point TF102 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2026 – Dec 31, 2031
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 13, 2026, sampling point TF102 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2026 – Dec 31, 2031
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 13, 2026, sampling point TF102 Dichloromethane 2964 EPA method 524.2 Jan 1, 2026 – Dec 31, 2031
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 13, 2026, sampling point TF102 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2026 – Dec 31, 2031
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 13, 2026, sampling point TF102 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2026 – Dec 31, 2031
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 13, 2026, sampling point TF102 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2026 – Dec 31, 2031
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 13, 2026, sampling point TF102 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2026 – Dec 31, 2031
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 13, 2026, sampling point TF102 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2026 – Dec 31, 2031
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 13, 2026, sampling point TF102 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2026 – Dec 31, 2031
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 13, 2026, sampling point TF102 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2026 – Dec 31, 2031
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 13, 2026, sampling point TF102 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2026 – Dec 31, 2031
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 13, 2026, sampling point TF102 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2026 – Dec 31, 2031
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 13, 2026, sampling point TF102 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2026 – Dec 31, 2031
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 13, 2026, sampling point TF102 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2026 – Dec 31, 2031
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 13, 2026, sampling point TF102 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2026 – Dec 31, 2031
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 13, 2026, sampling point TF102 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2026 – Dec 31, 2031
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 13, 2026, sampling point TF102 Benzene 2990 EPA method 524.2 Jan 1, 2026 – Dec 31, 2031
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 13, 2026, sampling point TF102 Toluene 2991 EPA method 524.2 Jan 1, 2026 – Dec 31, 2031
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 13, 2026, sampling point TF102 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2026 – Dec 31, 2031
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 13, 2026, sampling point TF102 Styrene 2996 EPA method 524.2 Jan 1, 2026 – Dec 31, 2031
Collected
Jun 17, 2026 01:25
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
810-196420-3
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Jun 17, 2026 01:25, sampling point MRT000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
1.3 ug/l , sample collected Jun 17, 2026 01:25, sampling point MRT000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
1.2 ug/l , sample collected Jun 17, 2026 01:25, sampling point MRT000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 17, 2026 01:25, sampling point MRT000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 17, 2026 01:25, sampling point MRT000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
2.5 ug/l , sample collected Jun 17, 2026 01:25, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2026 – Dec 31, 2026
2.7 ug/l , sample collected Jun 17, 2026 01:25, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 17, 2026 01:25, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
2 ug/l , sample collected Jun 17, 2026 01:25, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
1.1 ug/l , sample collected Jun 17, 2026 01:25, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
5.8 ug/l , sample collected Jun 17, 2026 01:25, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2026 – Dec 31, 2026
Collected
Jun 17, 2026 12:55
Sampling point
SM2 Location withheld
Sample type
Routine
Lab sample
810-196420-2
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Jun 17, 2026 12:55, sampling point SM2 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
1.4 ug/l , sample collected Jun 17, 2026 12:55, sampling point SM2 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
1.3 ug/l , sample collected Jun 17, 2026 12:55, sampling point SM2 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 17, 2026 12:55, sampling point SM2 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 17, 2026 12:55, sampling point SM2 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
2.7 ug/l , sample collected Jun 17, 2026 12:55, sampling point SM2 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Apr 1, 2026 – Jun 30, 2026
2.8 ug/l , sample collected Jun 17, 2026 12:55, sampling point SM2 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 17, 2026 12:55, sampling point SM2 Bromoform 2942 EPA method 524.2 Not recorded
1.9 ug/l , sample collected Jun 17, 2026 12:55, sampling point SM2 Bromodichloromethane 2943 EPA method 524.2 Not recorded
1.1 ug/l , sample collected Jun 17, 2026 12:55, sampling point SM2 Dibromochloromethane 2944 EPA method 524.2 Not recorded
5.8 ug/l , sample collected Jun 17, 2026 12:55, sampling point SM2 TTHM 2950 EPA method 524.2 Apr 1, 2026 – Jun 30, 2026
Collected
Jun 17, 2026 12:40
Sampling point
SM1 Location withheld
Sample type
Routine
Lab sample
810-196420-1
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Jun 17, 2026 12:40, sampling point SM1 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
1.4 ug/l , sample collected Jun 17, 2026 12:40, sampling point SM1 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
1.2 ug/l , sample collected Jun 17, 2026 12:40, sampling point SM1 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 17, 2026 12:40, sampling point SM1 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 17, 2026 12:40, sampling point SM1 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
2.6 ug/l , sample collected Jun 17, 2026 12:40, sampling point SM1 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Apr 1, 2026 – Jun 30, 2026
2.9 ug/l , sample collected Jun 17, 2026 12:40, sampling point SM1 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 17, 2026 12:40, sampling point SM1 Bromoform 2942 EPA method 524.2 Not recorded
2 ug/l , sample collected Jun 17, 2026 12:40, sampling point SM1 Bromodichloromethane 2943 EPA method 524.2 Not recorded
1.1 ug/l , sample collected Jun 17, 2026 12:40, sampling point SM1 Dibromochloromethane 2944 EPA method 524.2 Not recorded
6 ug/l , sample collected Jun 17, 2026 12:40, sampling point SM1 TTHM 2950 EPA method 524.2 Apr 1, 2026 – Jun 30, 2026
Collected
Feb 16, 2026 10:45
Sampling point
SM2 Location withheld
Sample type
Routine
Lab sample
810-181081-2
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Feb 16, 2026 10:45, sampling point SM2 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 16, 2026 10:45, sampling point SM2 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 16, 2026 10:45, sampling point SM2 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 16, 2026 10:45, sampling point SM2 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 16, 2026 10:45, sampling point SM2 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 2 ug/l Minimum Reporting Level , sample collected Feb 16, 2026 10:45, sampling point SM2 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2026 – Mar 31, 2026
1.3 ug/l , sample collected Feb 16, 2026 10:45, sampling point SM2 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 16, 2026 10:45, sampling point SM2 Bromoform 2942 EPA method 524.2 Not recorded
0.82 ug/l , sample collected Feb 16, 2026 10:45, sampling point SM2 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 16, 2026 10:45, sampling point SM2 Dibromochloromethane 2944 EPA method 524.2 Not recorded
2.12 ug/l , sample collected Feb 16, 2026 10:45, sampling point SM2 TTHM 2950 EPA method 524.2 Jan 1, 2026 – Mar 31, 2026
Collected
Feb 16, 2026 10:15
Sampling point
SM1 Location withheld
Sample type
Routine
Lab sample
810-181081-1
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Feb 16, 2026 10:15, sampling point SM1 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 16, 2026 10:15, sampling point SM1 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 16, 2026 10:15, sampling point SM1 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 16, 2026 10:15, sampling point SM1 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 16, 2026 10:15, sampling point SM1 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 2 ug/l Minimum Reporting Level , sample collected Feb 16, 2026 10:15, sampling point SM1 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2026 – Mar 31, 2026
1.2 ug/l , sample collected Feb 16, 2026 10:15, sampling point SM1 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 16, 2026 10:15, sampling point SM1 Bromoform 2942 EPA method 524.2 Not recorded
0.75 ug/l , sample collected Feb 16, 2026 10:15, sampling point SM1 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 16, 2026 10:15, sampling point SM1 Dibromochloromethane 2944 EPA method 524.2 Not recorded
1.95 ug/l , sample collected Feb 16, 2026 10:15, sampling point SM1 TTHM 2950 EPA method 524.2 Jan 1, 2026 – Mar 31, 2026
Collected
Nov 12, 2025 06:20
Sampling point
LC0012 Location withheld
Sample type
Routine
Lab sample
PB-251114-002
Laboratory
MSDH Lab
0.337 mg/l , sample collected Nov 12, 2025 06:20, sampling point LC0012 Copper, Free 1022 EPA method 200.8 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 12, 2025 06:20, sampling point LC0012 Lead 1030 EPA method 200.8 Not recorded
Collected
Nov 11, 2025 09:50
Sampling point
LC0006 Location withheld
Sample type
Routine
Lab sample
PB-251114-001
Laboratory
MSDH Lab
0.207 mg/l , sample collected Nov 11, 2025 09:50, sampling point LC0006 Copper, Free 1022 EPA method 200.8 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 11, 2025 09:50, sampling point LC0006 Lead 1030 EPA method 200.8 Not recorded
Collected
Nov 11, 2025 08:00
Sampling point
LC0009 Location withheld
Sample type
Routine
Lab sample
PB-251114-003
Laboratory
MSDH Lab
0.0272 mg/l , sample collected Nov 11, 2025 08:00, sampling point LC0009 Copper, Free 1022 EPA method 200.8 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 11, 2025 08:00, sampling point LC0009 Lead 1030 EPA method 200.8 Not recorded
Collected
Nov 11, 2025 06:45
Sampling point
LC0011 Location withheld
Sample type
Routine
Lab sample
PB-251114-004
Laboratory
MSDH Lab
0.1 mg/l , sample collected Nov 11, 2025 06:45, sampling point LC0011 Copper, Free 1022 EPA method 200.8 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 11, 2025 06:45, sampling point LC0011 Lead 1030 EPA method 200.8 Not recorded

Routine (10).