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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

MS0490020 , Hays Creek W/A - Alva

22 of the 57 analytes this system has been tested for have been detected at least once, across 225 samples on record.

The other 35 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 225 samples on record, detections range from October 8, 2003 to November 19, 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 - Alva, 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 61 of 61 results Aug 6, 2008 Sep 12, 2023
Lead 1030 Inorganic Chemical 26 of 61 results Aug 7, 2008 Sep 12, 2023
TTHM 2950 Organic Chemical 20 of 30 results Jul 19, 2004 Nov 19, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 19 of 30 results Jul 19, 2004 Mar 24, 2025
Barium 1010 Inorganic Chemical 15 of 15 results Oct 8, 2003 Mar 17, 2025
Chloroform 2941 Organic Chemical 14 of 23 results Apr 22, 2009 Nov 19, 2025
Fluoride 1025 Inorganic Chemical 14 of 15 results Oct 8, 2003 Mar 17, 2025
Dichloroacetic Acid 2451 Organic Chemical 10 of 23 results Apr 22, 2009 Feb 21, 2024
Chromium 1020 Inorganic Chemical 9 of 15 results Oct 8, 2003 Apr 30, 2020
Bromoform 2942 Organic Chemical 7 of 23 results Oct 14, 2009 Nov 19, 2025
Bromodichloromethane 2943 Organic Chemical 7 of 23 results Oct 14, 2009 Nov 19, 2025
Dibromochloromethane 2944 Organic Chemical 7 of 23 results Oct 14, 2009 Nov 19, 2025
Sodium 1052 Inorganic Chemical 6 of 6 results Sep 16, 2019 Feb 24, 2025
Monochloroacetic Acid 2450 Organic Chemical 5 of 23 results Oct 14, 2009 Sep 11, 2019
Trichloroacetic Acid 2452 Organic Chemical 4 of 23 results Oct 14, 2009 Feb 21, 2024
Dibromoacetic Acid 2454 Organic Chemical 4 of 23 results Oct 14, 2009 Feb 21, 2024
Nickel 1036 Inorganic Chemical 4 of 15 results Apr 29, 2013 May 6, 2019
Monobromoacetic Acid 2453 Organic Chemical 3 of 23 results Jul 13, 2009 Sep 28, 2020
Nitrate-Nitrite 1038 Inorganic Chemical 1 of 37 results Mar 30, 2021 Mar 30, 2021
Nitrate 1040 Inorganic Chemical 1 of 37 results Mar 30, 2021 Mar 30, 2021
Nitrite 1041 Inorganic Chemical 1 of 37 results Mar 30, 2021 Mar 30, 2021
Selenium 1045 Inorganic Chemical 1 of 15 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 91–100 of 225 samples, newest first — collected August 23, 2017 to September 6, 2017. The summary above covers all 225.

39 results from the 10 samples listed here: 13 detected, 26 not detected. Across the whole record it is 239 of 1,193. 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 - Alva, every result from 91 to 100 of 225 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 6, 2017 12:40
Sampling point
TF102 Treatment Facility TF102
Sample type
Routine
Lab sample
170907-007VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2017 12:40, sampling point TF102 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2017 12:40, sampling point TF102 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2017 12:40, sampling point TF102 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2017 12:40, sampling point TF102 Dichloromethane 2964 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2017 12:40, sampling point TF102 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2017 12:40, sampling point TF102 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2017 12:40, sampling point TF102 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2017 12:40, sampling point TF102 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2017 12:40, sampling point TF102 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2017 12:40, sampling point TF102 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2017 12:40, sampling point TF102 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2017 12:40, sampling point TF102 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2017 12:40, sampling point TF102 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2017 12:40, sampling point TF102 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2017 12:40, sampling point TF102 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2017 12:40, sampling point TF102 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2017 12:40, sampling point TF102 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2017 12:40, sampling point TF102 Benzene 2990 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2017 12:40, sampling point TF102 Toluene 2991 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2017 12:40, sampling point TF102 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2017 12:40, sampling point TF102 Styrene 2996 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Collected
Aug 23, 2017 06:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
170824-013PB
Laboratory
MSDH Lab
0.0411 mg/l , sample collected Aug 23, 2017 06:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 23, 2017 06:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Collected
Aug 23, 2017
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
170824-007PB
Laboratory
MSDH Lab
0.0032 mg/l , sample collected Aug 23, 2017, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 23, 2017, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Collected
Aug 23, 2017 05:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
170824-011PB
Laboratory
MSDH Lab
0.029 mg/l , sample collected Aug 23, 2017 05:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
0.0023 mg/l , sample collected Aug 23, 2017 05:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Collected
Aug 23, 2017 08:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
170824-008PB
Laboratory
MSDH Lab
0.0638 mg/l , sample collected Aug 23, 2017 08:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 23, 2017 08:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Collected
Aug 23, 2017 05:03
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
170824-006PB
Laboratory
MSDH Lab
0.2758 mg/l , sample collected Aug 23, 2017 05:03, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
0.0005 mg/l , sample collected Aug 23, 2017 05:03, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Collected
Aug 23, 2017 08:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
170824-005PB
Laboratory
MSDH Lab
0.0178 mg/l , sample collected Aug 23, 2017 08:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 23, 2017 08:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Collected
Aug 23, 2017 06:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
170824-004PB
Laboratory
MSDH Lab
0.0154 mg/l , sample collected Aug 23, 2017 06:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
0.0006 mg/l , sample collected Aug 23, 2017 06:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Collected
Aug 23, 2017 06:30
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
170824-003PB
Laboratory
MSDH Lab
0.0105 mg/l , sample collected Aug 23, 2017 06:30, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 23, 2017 06:30, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Collected
Aug 23, 2017 06:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
170824-002PB
Laboratory
MSDH Lab
0.0439 mg/l , sample collected Aug 23, 2017 06:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
0.001 mg/l , sample collected Aug 23, 2017 06:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017

Routine (10).