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; 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 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

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.

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The most recent samples, result by result

The table below lists 11–12 of 12 samples, newest first — collected November 5, 2024 to November 5, 2024. The summary above covers all 12.

22 results from the 2 samples listed here: 10 detected, 12 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 Hays Creek W/A - Alva, every result from 11 to 12 of 12 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 Nov 5, 2024 08:30 Sampling point SM2 Location withheld Sample type Routine Lab sample 810-127124-2 Laboratory Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Nov 5, 2024 08:30, sampling point SM2	Monochloroacetic Acid 2450 EPA method 552.2	Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Nov 5, 2024 08:30, sampling point SM2	Dichloroacetic Acid 2451 EPA method 552.2	Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Nov 5, 2024 08:30, sampling point SM2	Trichloroacetic Acid 2452 EPA method 552.2	Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Nov 5, 2024 08:30, sampling point SM2	Monobromoacetic Acid 2453 EPA method 552.2	Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Nov 5, 2024 08:30, sampling point SM2	Dibromoacetic Acid 2454 EPA method 552.2	Not recorded
Not detected below 2 ug/l Minimum Reporting Level , sample collected Nov 5, 2024 08:30, sampling point SM2	Total Haloacetic Acids (Haa5) 2456 EPA method 552.2	Oct 1, 2024 – Dec 31, 2024
8.3 ug/l , sample collected Nov 5, 2024 08:30, sampling point SM2	Chloroform 2941 EPA method 524.2	Not recorded
2.4 ug/l , sample collected Nov 5, 2024 08:30, sampling point SM2	Bromoform 2942 EPA method 524.2	Not recorded
9.5 ug/l , sample collected Nov 5, 2024 08:30, sampling point SM2	Bromodichloromethane 2943 EPA method 524.2	Not recorded
9.2 ug/l , sample collected Nov 5, 2024 08:30, sampling point SM2	Dibromochloromethane 2944 EPA method 524.2	Not recorded
29.4 ug/l , sample collected Nov 5, 2024 08:30, sampling point SM2	TTHM 2950 EPA method 524.2	Oct 1, 2024 – Dec 31, 2024
Collected Nov 5, 2024 08:15 Sampling point SM1 Location withheld Sample type Routine Lab sample 810-127124-1 Laboratory Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Nov 5, 2024 08:15, sampling point SM1	Monochloroacetic Acid 2450 EPA method 552.2	Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Nov 5, 2024 08:15, sampling point SM1	Dichloroacetic Acid 2451 EPA method 552.2	Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Nov 5, 2024 08:15, sampling point SM1	Trichloroacetic Acid 2452 EPA method 552.2	Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Nov 5, 2024 08:15, sampling point SM1	Monobromoacetic Acid 2453 EPA method 552.2	Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Nov 5, 2024 08:15, sampling point SM1	Dibromoacetic Acid 2454 EPA method 552.2	Not recorded
Not detected below 2 ug/l Minimum Reporting Level , sample collected Nov 5, 2024 08:15, sampling point SM1	Total Haloacetic Acids (Haa5) 2456 EPA method 552.2	Oct 1, 2024 – Dec 31, 2024
6.8 ug/l , sample collected Nov 5, 2024 08:15, sampling point SM1	Chloroform 2941 EPA method 524.2	Not recorded
3 ug/l , sample collected Nov 5, 2024 08:15, sampling point SM1	Bromoform 2942 EPA method 524.2	Not recorded
10 ug/l , sample collected Nov 5, 2024 08:15, sampling point SM1	Bromodichloromethane 2943 EPA method 524.2	Not recorded
11 ug/l , sample collected Nov 5, 2024 08:15, sampling point SM1	Dibromochloromethane 2944 EPA method 524.2	Not recorded
30.8 ug/l , sample collected Nov 5, 2024 08:15, sampling point SM1	TTHM 2950 EPA method 524.2	Oct 1, 2024 – Dec 31, 2024

Collected
Nov 5, 2024 08:30

Sampling point
SM2 Location withheld

Sample type
Routine

Lab sample
810-127124-2

Laboratory
Eurofins Eaton Analytical South Bend in
- Monochloroacetic Acid 2450 EPA method 552.2
  
  Result
  Not detected below 2 ug/l Minimum Reporting Level
  
  Monitoring period
  Not recorded
- Dichloroacetic Acid 2451 EPA method 552.2
  
  Result
  Not detected below 1 ug/l Minimum Reporting Level
  
  Monitoring period
  Not recorded
- Trichloroacetic Acid 2452 EPA method 552.2
  
  Result
  Not detected below 1 ug/l Minimum Reporting Level
  
  Monitoring period
  Not recorded
- Monobromoacetic Acid 2453 EPA method 552.2
  
  Result
  Not detected below 1 ug/l Minimum Reporting Level
  
  Monitoring period
  Not recorded
- Dibromoacetic Acid 2454 EPA method 552.2
  
  Result
  Not detected below 1 ug/l Minimum Reporting Level
  
  Monitoring period
  Not recorded
- Total Haloacetic Acids (Haa5) 2456 EPA method 552.2
  
  Result
  Not detected below 2 ug/l Minimum Reporting Level
  
  Monitoring period
  Oct 1, 2024 – Dec 31, 2024
- Chloroform 2941 EPA method 524.2
  
  Result
  8.3 ug/l
  
  Monitoring period
  Not recorded
- Bromoform 2942 EPA method 524.2
  
  Result
  2.4 ug/l
  
  Monitoring period
  Not recorded
- Bromodichloromethane 2943 EPA method 524.2
  
  Result
  9.5 ug/l
  
  Monitoring period
  Not recorded
- Dibromochloromethane 2944 EPA method 524.2
  
  Result
  9.2 ug/l
  
  Monitoring period
  Not recorded
- TTHM 2950 EPA method 524.2
  
  Result
  29.4 ug/l
  
  Monitoring period
  Oct 1, 2024 – Dec 31, 2024
Collected
Nov 5, 2024 08:15

Sampling point
SM1 Location withheld

Sample type
Routine

Lab sample
810-127124-1

Laboratory
Eurofins Eaton Analytical South Bend in
- Monochloroacetic Acid 2450 EPA method 552.2
  
  Result
  Not detected below 2 ug/l Minimum Reporting Level
  
  Monitoring period
  Not recorded
- Dichloroacetic Acid 2451 EPA method 552.2
  
  Result
  Not detected below 1 ug/l Minimum Reporting Level
  
  Monitoring period
  Not recorded
- Trichloroacetic Acid 2452 EPA method 552.2
  
  Result
  Not detected below 1 ug/l Minimum Reporting Level
  
  Monitoring period
  Not recorded
- Monobromoacetic Acid 2453 EPA method 552.2
  
  Result
  Not detected below 1 ug/l Minimum Reporting Level
  
  Monitoring period
  Not recorded
- Dibromoacetic Acid 2454 EPA method 552.2
  
  Result
  Not detected below 1 ug/l Minimum Reporting Level
  
  Monitoring period
  Not recorded
- Total Haloacetic Acids (Haa5) 2456 EPA method 552.2
  
  Result
  Not detected below 2 ug/l Minimum Reporting Level
  
  Monitoring period
  Oct 1, 2024 – Dec 31, 2024
- Chloroform 2941 EPA method 524.2
  
  Result
  6.8 ug/l
  
  Monitoring period
  Not recorded
- Bromoform 2942 EPA method 524.2
  
  Result
  3 ug/l
  
  Monitoring period
  Not recorded
- Bromodichloromethane 2943 EPA method 524.2
  
  Result
  10 ug/l
  
  Monitoring period
  Not recorded
- Dibromochloromethane 2944 EPA method 524.2
  
  Result
  11 ug/l
  
  Monitoring period
  Not recorded
- TTHM 2950 EPA method 524.2
  
  Result
  30.8 ug/l
  
  Monitoring period
  Oct 1, 2024 – Dec 31, 2024

Routine (2).