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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.

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

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 161–170 of 333 samples, newest first — collected August 18, 2014 to May 4, 2015. The summary above covers all 333.

22 results from the 10 samples listed here: 10 detected, 12 not detected. Across the whole record it is 331 of 2,009. 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 Oak Hill Water Assn, every result from 161 to 170 of 333 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
May 4, 2015 14:35
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
150505-090NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected May 4, 2015 14:35, sampling point TF103 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2015 – Dec 31, 2015
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected May 4, 2015 14:35, sampling point TF103 Nitrate 1040 EPA method QC10107041C Jan 1, 2015 – Dec 31, 2015
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected May 4, 2015 14:35, sampling point TF103 Nitrite 1041 EPA method QC10107041C Jan 1, 2015 – Dec 31, 2015
Collected
May 4, 2015 14:25
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
150505-031NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected May 4, 2015 14:25, sampling point TF102 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2015 – Dec 31, 2015
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected May 4, 2015 14:25, sampling point TF102 Nitrate 1040 EPA method QC10107041C Jan 1, 2015 – Dec 31, 2015
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected May 4, 2015 14:25, sampling point TF102 Nitrite 1041 EPA method QC10107041C Jan 1, 2015 – Dec 31, 2015
Collected
Aug 18, 2014 05:15
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
140819-050PB
Laboratory
MSDH Lab
0.1037 mg/l , sample collected Aug 18, 2014 05:15, 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 Aug 18, 2014 05:15, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Collected
Aug 18, 2014 08:30
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
140819-049PB
Laboratory
MSDH Lab
0.0195 mg/l , sample collected Aug 18, 2014 08:30, 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 Aug 18, 2014 08:30, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Collected
Aug 18, 2014 06:25
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
140819-048PB
Laboratory
MSDH Lab
0.3303 mg/l , sample collected Aug 18, 2014 06:25, 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 Aug 18, 2014 06:25, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Collected
Aug 18, 2014 07:10
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
140819-047PB
Laboratory
MSDH Lab
0.0214 mg/l , sample collected Aug 18, 2014 07:10, 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 Aug 18, 2014 07:10, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Collected
Aug 18, 2014 07:15
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
140819-044PB
Laboratory
MSDH Lab
0.5364 mg/l , sample collected Aug 18, 2014 07:15, 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 Aug 18, 2014 07:15, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Collected
Aug 18, 2014 07:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
140819-037PB
Laboratory
MSDH Lab
0.0907 mg/l , sample collected Aug 18, 2014 07:00, 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 Aug 18, 2014 07:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Collected
Aug 18, 2014 04:45
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
140819-036PB
Laboratory
MSDH Lab
0.3634 mg/l , sample collected Aug 18, 2014 04:45, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
0.0011 mg/l , sample collected Aug 18, 2014 04:45, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Collected
Aug 18, 2014 04:48
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
140819-035PB
Laboratory
MSDH Lab
0.3989 mg/l , sample collected Aug 18, 2014 04:48, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
0.0006 mg/l , sample collected Aug 18, 2014 04:48, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014

Routine (10).