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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 271–280 of 333 samples, newest first — collected March 22, 2006 to September 20, 2007. The summary above covers all 333.

33 results from the 10 samples listed here: 4 detected, 29 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 271 to 280 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
Sep 20, 2007
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
070921-009TH
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 20, 2007, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 20, 2007, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 20, 2007, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 20, 2007, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
0 This result is recorded as a detection, and the figure the agency wrote — "0.00" — is zero to the precision it was written to. Read the zero as "smaller than the written figure resolves", not as "none present". SDWIS holds a separate numeric concentration that Drinking Water Watch does not publish, so this endpoint does not carry it either; no more precise magnitude is available here. The agency recorded a value but no unit of measure for it. The unit is NOT inferable from the analyte: many analytes are reported in more than one unit — TTHM and HAA5 in both MG/L and UG/L — so there is no per-analyte default to fall back on. The number is published as it stands and must not be compared to a limit. The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected Sep 20, 2007, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2005 – Dec 31, 2007
Collected
Jul 31, 2006
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
060801-045NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jul 31, 2006, sampling point TF102 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2006 – Dec 31, 2006
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jul 31, 2006, sampling point TF102 Nitrate 1040 EPA method 353.2 Jan 1, 2006 – Dec 31, 2006
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jul 31, 2006, sampling point TF102 Nitrite 1041 EPA method 353.2 Jan 1, 2006 – Dec 31, 2006
Collected
Jul 31, 2006
Sampling point
TF104 Treatment Plant T104
Sample type
Routine
Lab sample
060801-064NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jul 31, 2006, sampling point TF104 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2006 – Dec 31, 2006
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jul 31, 2006, sampling point TF104 Nitrate 1040 EPA method 353.2 Jan 1, 2006 – Dec 31, 2006
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jul 31, 2006, sampling point TF104 Nitrite 1041 EPA method 353.2 Jan 1, 2006 – Dec 31, 2006
Collected
Jul 31, 2006
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
060801-065NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jul 31, 2006, sampling point TF101 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2006 – Dec 31, 2006
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jul 31, 2006, sampling point TF101 Nitrate 1040 EPA method 353.2 Jan 1, 2006 – Dec 31, 2006
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jul 31, 2006, sampling point TF101 Nitrite 1041 EPA method 353.2 Jan 1, 2006 – Dec 31, 2006
Collected
Jul 31, 2006
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
060801-044NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jul 31, 2006, sampling point TF103 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2006 – Dec 31, 2006
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jul 31, 2006, sampling point TF103 Nitrate 1040 EPA method 353.2 Jan 1, 2006 – Dec 31, 2006
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jul 31, 2006, sampling point TF103 Nitrite 1041 EPA method 353.2 Jan 1, 2006 – Dec 31, 2006
Collected
Mar 27, 2006
Sampling point
TF104 Treatment Plant T104
Sample type
Routine
Lab sample
060328-061CN
Laboratory
MSDH Lab
Not detected below 0.005 mg/l Minimum Reporting Level , sample collected Mar 27, 2006, sampling point TF104 Cyanide 1024 EPA method QC10204001X Jan 1, 2005 – Dec 31, 2007
Collected
Mar 27, 2006
Sampling point
TF104 Treatment Plant T104
Sample type
Routine
Lab sample
060328-106IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 27, 2006, sampling point TF104 Arsenic 1005 EPA method 200.8 Not recorded
0.159 mg/l , sample collected Mar 27, 2006, sampling point TF104 Barium 1010 EPA method 200.8 Not recorded
Not detected below 0.0001 mg/l Minimum Reporting Level , sample collected Mar 27, 2006, sampling point TF104 Cadmium 1015 EPA method 200.8 Not recorded
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 27, 2006, sampling point TF104 Chromium 1020 EPA method 200.8 Not recorded
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 27, 2006, sampling point TF104 Fluoride 1025 EPA method 380-75WE Not recorded
Not detected below 0.0002 mg/l Minimum Reporting Level , sample collected Mar 27, 2006, sampling point TF104 Mercury 1035 EPA method 200.8 Not recorded
0.000923 mg/l , sample collected Mar 27, 2006, sampling point TF104 Nickel 1036 EPA method 200.8 Not recorded
0.001079 mg/l , sample collected Mar 27, 2006, sampling point TF104 Selenium 1045 EPA method 200.8 Not recorded
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 27, 2006, sampling point TF104 Antimony, Total 1074 EPA method 200.8 Not recorded
Not detected below 0.0001 mg/l Minimum Reporting Level , sample collected Mar 27, 2006, sampling point TF104 Beryllium, Total 1075 EPA method 200.8 Not recorded
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 27, 2006, sampling point TF104 Thallium, Total 1085 EPA method 200.8 Not recorded
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 27, 2006, sampling point TF104 Uranium-238 4009 Not recorded
Collected
Mar 22, 2006
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
060323-001CN
Laboratory
MSDH Lab
Not detected below 0.005 mg/l Minimum Reporting Level , sample collected Mar 22, 2006, sampling point TF102 Cyanide 1024 EPA method QC10204001X Jan 1, 2005 – Dec 31, 2007
Collected
Mar 22, 2006
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
060323-004CN
Laboratory
MSDH Lab
Not detected below 0.005 mg/l Minimum Reporting Level , sample collected Mar 22, 2006, sampling point TF103 Cyanide 1024 EPA method QC10204001X Jan 1, 2005 – Dec 31, 2007
Collected
Mar 22, 2006
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
060323-019CN
Laboratory
MSDH Lab
Not detected below 0.005 mg/l Minimum Reporting Level , sample collected Mar 22, 2006, sampling point TF101 Cyanide 1024 EPA method QC10204001X Jan 1, 2005 – Dec 31, 2007

Routine (10).