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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

MS0580004 , Oak Hill Water Assn

35 of the 72 analytes this system has been tested for have been detected at least once, across 333 samples on record.

The other 37 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 333 samples on record, detections range from October 15, 2003 to June 23, 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 Oak Hill Water 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 62 of 62 results Sep 25, 2007 Sep 13, 2023
Barium 1010 Inorganic Chemical 38 of 38 results Oct 15, 2003 Jun 23, 2026
Fluoride 1025 Inorganic Chemical 30 of 39 results Oct 15, 2003 Jun 23, 2026
Nickel 1036 Inorganic Chemical 29 of 37 results Mar 15, 2004 Mar 18, 2025
Chromium 1020 Inorganic Chemical 24 of 38 results Oct 15, 2003 Mar 24, 2020
Arsenic 1005 Inorganic Chemical 21 of 38 results Mar 15, 2004 Mar 18, 2025
Lead 1030 Inorganic Chemical 21 of 62 results Sep 25, 2007 Sep 13, 2023
TTHM 2950 Organic Chemical 17 of 19 results Jul 26, 2004 Sep 10, 2025
Sodium 1052 Inorganic Chemical 14 of 14 results May 12, 2016 Jun 23, 2026
Bromoform 2942 Organic Chemical 12 of 15 results Jun 29, 2010 Sep 10, 2025
Selenium 1045 Inorganic Chemical 11 of 38 results Mar 15, 2004 May 9, 2017
Gross Alpha, Incl. Radon & U 4002 Radionuclide 10 of 10 results Dec 12, 2011 Oct 11, 2012
Sulfate 1055 Inorganic Chemical 8 of 9 results Oct 15, 2003 May 12, 2016
Dibromochloromethane 2944 Organic Chemical 5 of 15 results Mar 13, 2024 Sep 10, 2025
Xylenes, Total 2955 Organic Chemical 5 of 43 results Aug 18, 2010 Sep 6, 2022
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 2 of 19 results Jun 29, 2010 Apr 22, 2019
Ethylbenzene 2992 Organic Chemical 2 of 43 results May 9, 2018 Aug 21, 2018
Combined Radium (-226 & -228) 4010 Radionuclide 2 of 12 results Sep 20, 2012 Dec 10, 2012
Radium-226 4020 Radionuclide 2 of 12 results Sep 20, 2012 Dec 10, 2012
Dibromoacetic Acid 2454 Organic Chemical 1 of 15 results Apr 22, 2019 Apr 22, 2019
Calcium 1016 Inorganic Chemical 1 of 1 result May 12, 2016 May 12, 2016
Chloride 1017 Inorganic Chemical 1 of 1 result May 12, 2016 May 12, 2016
Iron 1028 Inorganic Chemical 1 of 1 result May 12, 2016 May 12, 2016
Magnesium 1031 Inorganic Chemical 1 of 1 result May 12, 2016 May 12, 2016
Manganese 1032 Inorganic Chemical 1 of 1 result May 12, 2016 May 12, 2016
Potassium 1042 Inorganic Chemical 1 of 1 result May 12, 2016 May 12, 2016
Residue, Total, Filterable 1057 Water Quality 1 of 1 result May 12, 2016 May 12, 2016
Carbon Dioxide 1901 Water Quality 1 of 1 result May 12, 2016 May 12, 2016
Color 1905 Water Quality 1 of 1 result May 12, 2016 May 12, 2016
Hardness, Total (As Caco3) 1915 Water Quality 1 of 1 result May 12, 2016 May 12, 2016
Alkalinity, Total 1927 Water Quality 1 of 1 result May 12, 2016 May 12, 2016
Iron, Field Result FEFD Inorganic Chemical 1 of 1 result May 12, 2016 May 12, 2016
Calculated Sodium NACA Water Quality 1 of 1 result May 12, 2016 May 12, 2016
PH, Field Result PHFD Water Quality 1 of 1 result May 12, 2016 May 12, 2016
Gross Alpha Particle Activity 4109 Radionuclide 1 of 2 results Dec 10, 2012 Dec 10, 2012

Showing samples collected between September 25, 2024 and September 25, 2026. That is this page’s default, not a limit on what the agency records.

Show every sample on record

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The most recent samples, result by result

The table below lists 11–17 of 17 samples, newest first — collected November 19, 2024 to March 18, 2025. The summary above covers all 17.

47 results from the 7 samples listed here: 7 detected, 40 not detected. 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 2 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 Oak Hill Water Assn, every result from 11 to 17 of 17 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
Mar 18, 2025 12:45
Sampling point
TF106 Treatment Facility TF106
Sample type
Routine
Lab sample
VO-250319-004
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 18, 2025 12:45, sampling point TF106 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2025 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 18, 2025 12:45, sampling point TF106 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2025 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 18, 2025 12:45, sampling point TF106 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2025 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 18, 2025 12:45, sampling point TF106 Dichloromethane 2964 EPA method 524.2 Jan 1, 2025 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 18, 2025 12:45, sampling point TF106 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2025 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 18, 2025 12:45, sampling point TF106 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2025 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 18, 2025 12:45, sampling point TF106 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2025 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 18, 2025 12:45, sampling point TF106 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2025 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 18, 2025 12:45, sampling point TF106 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2025 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 18, 2025 12:45, sampling point TF106 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2025 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 18, 2025 12:45, sampling point TF106 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2025 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 18, 2025 12:45, sampling point TF106 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2025 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 18, 2025 12:45, sampling point TF106 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2025 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 18, 2025 12:45, sampling point TF106 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2025 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 18, 2025 12:45, sampling point TF106 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2025 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 18, 2025 12:45, sampling point TF106 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2025 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 18, 2025 12:45, sampling point TF106 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2025 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 18, 2025 12:45, sampling point TF106 Benzene 2990 EPA method 524.2 Jan 1, 2025 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 18, 2025 12:45, sampling point TF106 Toluene 2991 EPA method 524.2 Jan 1, 2025 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 18, 2025 12:45, sampling point TF106 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2025 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 18, 2025 12:45, sampling point TF106 Styrene 2996 EPA method 524.2 Jan 1, 2025 – Dec 31, 2027
Collected
Mar 3, 2025 11:41
Sampling point
TF106 Treatment Facility TF106
Sample type
Routine
Lab sample
NA-250304-012
Laboratory
MSDH Lab
44.7 mg/l , sample collected Mar 3, 2025 11:41, sampling point TF106 Sodium 1052 EPA method 200.7 Jan 1, 2023 – Dec 31, 2025
Collected
Mar 3, 2025 11:29
Sampling point
TF104 Treatment Plant T104
Sample type
Routine
Lab sample
NA-250304-011
Laboratory
MSDH Lab
44.2 mg/l , sample collected Mar 3, 2025 11:29, sampling point TF104 Sodium 1052 EPA method 200.7 Jan 1, 2023 – Dec 31, 2025
Collected
Mar 3, 2025 11:51
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
NA-250304-010
Laboratory
MSDH Lab
63.8 mg/l , sample collected Mar 3, 2025 11:51, sampling point TF103 Sodium 1052 EPA method 200.7 Jan 1, 2023 – Dec 31, 2025
Collected
Mar 3, 2025 12:05
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
NA-250304-009
Laboratory
MSDH Lab
52.4 mg/l , sample collected Mar 3, 2025 12:05, sampling point TF102 Sodium 1052 EPA method 200.7 Jan 1, 2023 – Dec 31, 2025
Collected
Nov 19, 2024 15:30
Sampling point
SM2 Location withheld
Sample type
Routine
Lab sample
810-128739-2
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Nov 19, 2024 15:30, sampling point SM2 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Nov 19, 2024 15:30, sampling point SM2 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Nov 19, 2024 15:30, sampling point SM2 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Nov 19, 2024 15:30, sampling point SM2 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Nov 19, 2024 15:30, sampling point SM2 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 2 ug/l Minimum Reporting Level , sample collected Nov 19, 2024 15:30, sampling point SM2 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Oct 1, 2024 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 19, 2024 15:30, sampling point SM2 Chloroform 2941 EPA method 524.2 Not recorded
1.5 ug/l , sample collected Nov 19, 2024 15:30, sampling point SM2 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 19, 2024 15:30, sampling point SM2 Bromodichloromethane 2943 EPA method 524.2 Not recorded
0.89 ug/l , sample collected Nov 19, 2024 15:30, sampling point SM2 Dibromochloromethane 2944 EPA method 524.2 Not recorded
2.39 ug/l , sample collected Nov 19, 2024 15:30, sampling point SM2 TTHM 2950 EPA method 524.2 Oct 1, 2024 – Dec 31, 2024
Collected
Nov 19, 2024 15:10
Sampling point
SM1 Location withheld
Sample type
Routine
Lab sample
810-128739-1
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Nov 19, 2024 15:10, sampling point SM1 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Nov 19, 2024 15:10, sampling point SM1 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Nov 19, 2024 15:10, sampling point SM1 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Nov 19, 2024 15:10, sampling point SM1 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Nov 19, 2024 15:10, sampling point SM1 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 2 ug/l Minimum Reporting Level , sample collected Nov 19, 2024 15:10, sampling point SM1 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Oct 1, 2024 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 19, 2024 15:10, sampling point SM1 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 19, 2024 15:10, sampling point SM1 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 19, 2024 15:10, sampling point SM1 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 19, 2024 15:10, sampling point SM1 Dibromochloromethane 2944 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 19, 2024 15:10, sampling point SM1 TTHM 2950 EPA method 524.2 Oct 1, 2024 – Dec 31, 2024

Routine (7).