Chemical and radiological sample results

MS0490016 , Hays Creek W/A-Minerva

23 of the 57 analytes this system has been tested for have been detected at least once, across 114 samples on record.

The other 34 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 114 samples on record, detections range from October 8, 2003 to September 12, 2025. 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 Hays Creek W/A-Minerva, 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	35 of 35 results	Sep 22, 2004	Sep 11, 2023
Lead 1030	Inorganic Chemical	25 of 35 results	Sep 22, 2004	Jul 29, 2020
Barium 1010	Inorganic Chemical	9 of 9 results	Oct 8, 2003	Mar 17, 2025
Fluoride 1025	Inorganic Chemical	9 of 9 results	Oct 8, 2003	Mar 17, 2025
TTHM 2950	Organic Chemical	7 of 12 results	Jul 19, 2004	Sep 12, 2025
Total Haloacetic Acids (Haa5) 2456	Organic Chemical	4 of 10 results	Jun 16, 2010	Jun 26, 2023
Chromium 1020	Inorganic Chemical	4 of 9 results	Apr 4, 2005	May 6, 2019
Chloroform 2941	Organic Chemical	3 of 7 results	Aug 27, 2007	Sep 12, 2025
Sodium 1052	Inorganic Chemical	3 of 3 results	Sep 16, 2019	Feb 24, 2025
Bromodichloromethane 2943	Organic Chemical	2 of 7 results	Jul 13, 2016	Sep 12, 2025
Dichloroacetic Acid 2451	Organic Chemical	2 of 6 results	Jul 13, 2016	Sep 11, 2019
Nickel 1036	Inorganic Chemical	2 of 9 results	Apr 29, 2013	May 6, 2019
Monochloroacetic Acid 2450	Organic Chemical	1 of 6 results	Sep 11, 2019	Sep 11, 2019
Monobromoacetic Acid 2453	Organic Chemical	1 of 6 results	Sep 11, 2019	Sep 11, 2019
Trichloroacetic Acid 2452	Organic Chemical	1 of 6 results	Jul 13, 2016	Jul 13, 2016
Dibromoacetic Acid 2454	Organic Chemical	1 of 6 results	Jul 13, 2016	Jul 13, 2016
Dibromochloromethane 2944	Organic Chemical	1 of 7 results	Jul 13, 2016	Jul 13, 2016
Gross Alpha Particle Activity 4109	Radionuclide	1 of 4 results	Sep 11, 2012	Sep 11, 2012
Combined Radium (-226 & -228) 4010	Radionuclide	1 of 4 results	Dec 21, 2011	Dec 21, 2011
Radium-228 4030	Radionuclide	1 of 4 results	Dec 21, 2011	Dec 21, 2011
Nitrate-Nitrite 1038	Inorganic Chemical	1 of 22 results	May 16, 2007	May 16, 2007
Nitrate 1040	Inorganic Chemical	1 of 22 results	May 16, 2007	May 16, 2007
Selenium 1045	Inorganic Chemical	1 of 9 results	Apr 4, 2005	Apr 4, 2005

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 111–114 of 114 samples, newest first — collected October 8, 2003 to March 16, 2004. The summary above covers all 114.

35 results from the 4 samples listed here: 2 detected, 33 not detected. 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 Hays Creek W/A-Minerva, every result from 111 to 114 of 114 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 16, 2004 Sampling point TF101 Treatment Plant T101 Sample type Routine Lab sample 040317-003CN Laboratory MSDH Lab
Not detected below 0.01 mg/l Minimum Reporting Level , sample collected Mar 16, 2004, sampling point TF101	Cyanide 1024 EPA method QC10204001X	Jan 1, 2002 – Dec 31, 2004
Collected Feb 17, 2004 Sampling point TF101 Treatment Plant T101 Sample type Routine Lab sample 040218-116VO Laboratory MSDH Lab
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Feb 17, 2004, sampling point TF101	1,2,4-Trichlorobenzene 2378	Jan 1, 2004 – Mar 31, 2004
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Feb 17, 2004, sampling point TF101	Cis-1,2-Dichloroethylene 2380	Jan 1, 2004 – Mar 31, 2004
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Feb 17, 2004, sampling point TF101	Xylenes, Total 2955	Jan 1, 2004 – Mar 31, 2004
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Feb 17, 2004, sampling point TF101	Dichloromethane 2964	Jan 1, 2004 – Mar 31, 2004
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Feb 17, 2004, sampling point TF101	O-Dichlorobenzene 2968	Jan 1, 2004 – Mar 31, 2004
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Feb 17, 2004, sampling point TF101	P-Dichlorobenzene 2969	Jan 1, 2004 – Mar 31, 2004
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Feb 17, 2004, sampling point TF101	Vinyl Chloride 2976	Jan 1, 2004 – Mar 31, 2004
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Feb 17, 2004, sampling point TF101	1,1-Dichloroethylene 2977	Jan 1, 2004 – Mar 31, 2004
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Feb 17, 2004, sampling point TF101	Trans-1,2-Dichloroethylene 2979	Jan 1, 2004 – Mar 31, 2004
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Feb 17, 2004, sampling point TF101	1,2-Dichloroethane 2980	Jan 1, 2004 – Mar 31, 2004
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Feb 17, 2004, sampling point TF101	1,1,1-Trichloroethane 2981	Jan 1, 2004 – Mar 31, 2004
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Feb 17, 2004, sampling point TF101	Carbon Tetrachloride 2982	Jan 1, 2004 – Mar 31, 2004
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Feb 17, 2004, sampling point TF101	1,2-Dichloropropane 2983	Jan 1, 2004 – Mar 31, 2004
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Feb 17, 2004, sampling point TF101	Trichloroethylene 2984	Jan 1, 2004 – Mar 31, 2004
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Feb 17, 2004, sampling point TF101	1,1,2-Trichloroethane 2985	Jan 1, 2004 – Mar 31, 2004
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Feb 17, 2004, sampling point TF101	Tetrachloroethylene 2987	Jan 1, 2004 – Mar 31, 2004
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Feb 17, 2004, sampling point TF101	Chlorobenzene 2989	Jan 1, 2004 – Mar 31, 2004
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Feb 17, 2004, sampling point TF101	Benzene 2990	Jan 1, 2004 – Mar 31, 2004
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Feb 17, 2004, sampling point TF101	Toluene 2991	Jan 1, 2004 – Mar 31, 2004
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Feb 17, 2004, sampling point TF101	Ethylbenzene 2992	Jan 1, 2004 – Mar 31, 2004
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Feb 17, 2004, sampling point TF101	Styrene 2996	Jan 1, 2004 – Mar 31, 2004
Collected Oct 8, 2003 Sampling point TF101 Treatment Plant T101 Sample type Routine Lab sample 031009-025IN Laboratory MSDH Lab
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Oct 8, 2003, sampling point TF101	Arsenic 1005 EPA method 200.8	Not recorded
0.011 mg/l , sample collected Oct 8, 2003, sampling point TF101	Barium 1010 EPA method 200.8	Not recorded
Not detected below 0.0001 mg/l Minimum Reporting Level , sample collected Oct 8, 2003, sampling point TF101	Cadmium 1015 EPA method 200.8	Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Oct 8, 2003, sampling point TF101	Chromium 1020 EPA method 200.8	Not recorded
0.16 mg/l , sample collected Oct 8, 2003, sampling point TF101	Fluoride 1025 EPA method 300.0	Not recorded
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 8, 2003, sampling point TF101	Mercury 1035 EPA method 200.8	Not recorded
Not detected below 0.005 mg/l Minimum Reporting Level , sample collected Oct 8, 2003, sampling point TF101	Nickel 1036 EPA method 200.8	Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Oct 8, 2003, sampling point TF101	Selenium 1045 EPA method 200.8	Not recorded
Not detected below 2.5 mg/l Minimum Reporting Level , sample collected Oct 8, 2003, sampling point TF101	Sulfate 1055 EPA method 300.0	Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Oct 8, 2003, sampling point TF101	Antimony, Total 1074 EPA method 200.8	Not recorded
Not detected below 0.0003 mg/l Minimum Reporting Level , sample collected Oct 8, 2003, sampling point TF101	Beryllium, Total 1075 EPA method 200.8	Not recorded
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 8, 2003, sampling point TF101	Thallium, Total 1085 EPA method 200.8	Not recorded
Collected Oct 8, 2003 Sampling point TF101 Treatment Plant T101 Sample type Routine Lab sample 031009-021CN Laboratory MSDH Lab
Not detected below 0.01 mg/l Minimum Reporting Level , sample collected Oct 8, 2003, sampling point TF101	Cyanide 1024 EPA method QC10204001X	Jan 1, 2002 – Dec 31, 2004

Collected
Mar 16, 2004

Sampling point
TF101 Treatment Plant T101

Sample type
Routine

Lab sample
040317-003CN

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2002 – Dec 31, 2004
- Cyanide 1024 EPA method QC10204001X
  
  Result
  Not detected below 0.01 mg/l Minimum Reporting Level
Collected
Feb 17, 2004

Sampling point
TF101 Treatment Plant T101

Sample type
Routine

Lab sample
040218-116VO

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2004 – Mar 31, 2004
- 1,2,4-Trichlorobenzene 2378
  
  Result
  Not detected below 0.0005 mg/l Method Detection Limit
- Cis-1,2-Dichloroethylene 2380
  
  Result
  Not detected below 0.0005 mg/l Method Detection Limit
- Xylenes, Total 2955
  
  Result
  Not detected below 0.0005 mg/l Method Detection Limit
- Dichloromethane 2964
  
  Result
  Not detected below 0.0005 mg/l Method Detection Limit
- O-Dichlorobenzene 2968
  
  Result
  Not detected below 0.0005 mg/l Method Detection Limit
- P-Dichlorobenzene 2969
  
  Result
  Not detected below 0.0005 mg/l Method Detection Limit
- Vinyl Chloride 2976
  
  Result
  Not detected below 0.0005 mg/l Method Detection Limit
- 1,1-Dichloroethylene 2977
  
  Result
  Not detected below 0.0005 mg/l Method Detection Limit
- Trans-1,2-Dichloroethylene 2979
  
  Result
  Not detected below 0.0005 mg/l Method Detection Limit
- 1,2-Dichloroethane 2980
  
  Result
  Not detected below 0.0005 mg/l Method Detection Limit
- 1,1,1-Trichloroethane 2981
  
  Result
  Not detected below 0.0005 mg/l Method Detection Limit
- Carbon Tetrachloride 2982
  
  Result
  Not detected below 0.0005 mg/l Method Detection Limit
- 1,2-Dichloropropane 2983
  
  Result
  Not detected below 0.0005 mg/l Method Detection Limit
- Trichloroethylene 2984
  
  Result
  Not detected below 0.0005 mg/l Method Detection Limit
- 1,1,2-Trichloroethane 2985
  
  Result
  Not detected below 0.0005 mg/l Method Detection Limit
- Tetrachloroethylene 2987
  
  Result
  Not detected below 0.0005 mg/l Method Detection Limit
- Chlorobenzene 2989
  
  Result
  Not detected below 0.0005 mg/l Method Detection Limit
- Benzene 2990
  
  Result
  Not detected below 0.0005 mg/l Method Detection Limit
- Toluene 2991
  
  Result
  Not detected below 0.0005 mg/l Method Detection Limit
- Ethylbenzene 2992
  
  Result
  Not detected below 0.0005 mg/l Method Detection Limit
- Styrene 2996
  
  Result
  Not detected below 0.0005 mg/l Method Detection Limit
Collected
Oct 8, 2003

Sampling point
TF101 Treatment Plant T101

Sample type
Routine

Lab sample
031009-025IN

Laboratory
MSDH Lab

Monitoring period
Not recorded
- Arsenic 1005 EPA method 200.8
  
  Result
  Not detected below 0.001 mg/l Minimum Reporting Level
- Barium 1010 EPA method 200.8
  
  Result
  0.011 mg/l
- Cadmium 1015 EPA method 200.8
  
  Result
  Not detected below 0.0001 mg/l Minimum Reporting Level
- Chromium 1020 EPA method 200.8
  
  Result
  Not detected below 0.001 mg/l Minimum Reporting Level
- Fluoride 1025 EPA method 300.0
  
  Result
  0.16 mg/l
- Mercury 1035 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
- Nickel 1036 EPA method 200.8
  
  Result
  Not detected below 0.005 mg/l Minimum Reporting Level
- Selenium 1045 EPA method 200.8
  
  Result
  Not detected below 0.001 mg/l Minimum Reporting Level
- Sulfate 1055 EPA method 300.0
  
  Result
  Not detected below 2.5 mg/l Minimum Reporting Level
- Antimony, Total 1074 EPA method 200.8
  
  Result
  Not detected below 0.001 mg/l Minimum Reporting Level
- Beryllium, Total 1075 EPA method 200.8
  
  Result
  Not detected below 0.0003 mg/l Minimum Reporting Level
- Thallium, Total 1085 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
Collected
Oct 8, 2003

Sampling point
TF101 Treatment Plant T101

Sample type
Routine

Lab sample
031009-021CN

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2002 – Dec 31, 2004
- Cyanide 1024 EPA method QC10204001X
  
  Result
  Not detected below 0.01 mg/l Minimum Reporting Level

Routine (4).