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.

Show every sample on record

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The most recent samples, result by result

The table below lists 1–10 of 12 samples, newest first — collected February 24, 2025 to February 11, 2026. The summary above covers all 12.

35 results from the 10 samples listed here: 10 detected, 25 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.

We withheld the location of 1 sampling point 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 1 to 10 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 Feb 11, 2026 08:30 Sampling point SM2 Location withheld Sample type Routine Lab sample 810-180776-1 Laboratory Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Feb 11, 2026 08:30, sampling point SM2	Monochloroacetic Acid 2450 EPA method 552.2	Jan 1, 2026 – Dec 31, 2026
Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 11, 2026 08:30, sampling point SM2	Dichloroacetic Acid 2451 EPA method 552.2	Jan 1, 2026 – Dec 31, 2026
Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 11, 2026 08:30, sampling point SM2	Trichloroacetic Acid 2452 EPA method 552.2	Jan 1, 2026 – Dec 31, 2026
Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 11, 2026 08:30, sampling point SM2	Monobromoacetic Acid 2453 EPA method 552.2	Jan 1, 2026 – Dec 31, 2026
Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 11, 2026 08:30, sampling point SM2	Dibromoacetic Acid 2454 EPA method 552.2	Jan 1, 2026 – Dec 31, 2026
Not detected below 2 ug/l Minimum Reporting Level , sample collected Feb 11, 2026 08:30, sampling point SM2	Total Haloacetic Acids (Haa5) 2456 EPA method 552.2	Jan 1, 2026 – Dec 31, 2026
Collected Feb 11, 2026 08:15 Sampling point TF102 Treatment Facility TF102 Sample type Routine Lab sample NI-260212-010 Laboratory MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 11, 2026 08:15, sampling point TF102	Nitrate-Nitrite 1038 EPA method QC10107041C	Jan 1, 2026 – Dec 31, 2026
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Feb 11, 2026 08:15, sampling point TF102	Nitrate 1040 EPA method QC10107041C	Jan 1, 2026 – Dec 31, 2026
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 11, 2026 08:15, sampling point TF102	Nitrite 1041 EPA method QC10107041C	Jan 1, 2026 – Dec 31, 2026
Collected Nov 19, 2025 13:50 Sampling point SM2 Location withheld Sample type Routine Lab sample 810-172734-1 Laboratory Eurofins Eaton Analytical South Bend in
1.7 ug/l , sample collected Nov 19, 2025 13:50, sampling point SM2	Chloroform 2941 EPA method 524.2	Not recorded
2 ug/l , sample collected Nov 19, 2025 13:50, sampling point SM2	Bromoform 2942 EPA method 524.2	Not recorded
1.9 ug/l , sample collected Nov 19, 2025 13:50, sampling point SM2	Bromodichloromethane 2943 EPA method 524.2	Not recorded
3.1 ug/l , sample collected Nov 19, 2025 13:50, sampling point SM2	Dibromochloromethane 2944 EPA method 524.2	Not recorded
8.7 ug/l , sample collected Nov 19, 2025 13:50, sampling point SM2	TTHM 2950 EPA method 524.2	Jan 1, 2025 – Dec 31, 2025
Collected Sep 15, 2025 11:45 Sampling point TF101 Treatment Plant T101 Sample type Routine Lab sample CN-250916-002 Laboratory MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Sep 15, 2025 11:45, sampling point TF101	Cyanide 1024 EPA method QC10204001X	Jan 1, 2023 – Dec 31, 2025
Collected Mar 24, 2025 13:00 Sampling point TF102 Treatment Facility TF102 Sample type Routine Lab sample NI-250325-047 Laboratory MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 24, 2025 13:00, sampling point TF102	Nitrate-Nitrite 1038 EPA method QC10107041C	Jan 1, 2025 – Dec 31, 2025
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 24, 2025 13:00, sampling point TF102	Nitrate 1040 EPA method QC10107041C	Jan 1, 2025 – Dec 31, 2025
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 24, 2025 13:00, sampling point TF102	Nitrite 1041 EPA method QC10107041C	Jan 1, 2025 – Dec 31, 2025
Collected Mar 24, 2025 12:45 Sampling point TF101 Treatment Plant T101 Sample type Routine Lab sample NI-250325-046 Laboratory MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 24, 2025 12:45, sampling point TF101	Nitrate-Nitrite 1038 EPA method QC10107041C	Jan 1, 2025 – Dec 31, 2025
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 24, 2025 12:45, sampling point TF101	Nitrate 1040 EPA method QC10107041C	Jan 1, 2025 – Dec 31, 2025
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 24, 2025 12:45, sampling point TF101	Nitrite 1041 EPA method QC10107041C	Jan 1, 2025 – Dec 31, 2025
Collected Mar 24, 2025 13:00 Sampling point SM2 SM2 Sample type Routine Lab sample HA-250325-014 Laboratory MSDH Lab
2.02 ug/l , sample collected Mar 24, 2025 13:00, sampling point SM2	Total Haloacetic Acids (Haa5) 2456 EPA method 552.2	Not recorded
Collected Mar 17, 2025 12:10 Sampling point TF101 Treatment Plant T101 Sample type Routine Lab sample IN-250318-018 Laboratory MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 17, 2025 12:10, sampling point TF101	Arsenic 1005 EPA method 200.8	Jan 1, 2023 – Dec 31, 2025
0.0046 mg/l , sample collected Mar 17, 2025 12:10, sampling point TF101	Barium 1010 EPA method 200.8	Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 17, 2025 12:10, sampling point TF101	Cadmium 1015 EPA method 200.8	Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 17, 2025 12:10, sampling point TF101	Chromium 1020 EPA method 200.8	Jan 1, 2023 – Dec 31, 2025
0.148 mg/l , sample collected Mar 17, 2025 12:10, sampling point TF101	Fluoride 1025 EPA method QC 10-109-12-2-A	Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 17, 2025 12:10, sampling point TF101	Mercury 1035 EPA method 200.8	Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 17, 2025 12:10, sampling point TF101	Nickel 1036 EPA method 200.8	Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Mar 17, 2025 12:10, sampling point TF101	Selenium 1045 EPA method 200.8	Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 17, 2025 12:10, sampling point TF101	Antimony, Total 1074 EPA method 200.8	Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 17, 2025 12:10, sampling point TF101	Beryllium, Total 1075 EPA method 200.8	Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 17, 2025 12:10, sampling point TF101	Thallium, Total 1085 EPA method 200.8	Jan 1, 2023 – Dec 31, 2025
Collected Feb 24, 2025 10:35 Sampling point TF102 Treatment Facility TF102 Sample type Routine Lab sample NA-250225-012 Laboratory MSDH Lab
88.2 mg/l , sample collected Feb 24, 2025 10:35, sampling point TF102	Sodium 1052 EPA method 200.7	Jan 1, 2023 – Dec 31, 2025
Collected Feb 24, 2025 10:35 Sampling point TF101 Treatment Plant T101 Sample type Routine Lab sample NA-250225-011 Laboratory MSDH Lab
81.2 mg/l , sample collected Feb 24, 2025 10:35, sampling point TF101	Sodium 1052 EPA method 200.7	Jan 1, 2023 – Dec 31, 2025

Collected
Feb 11, 2026 08:30

Sampling point
SM2 Location withheld

Sample type
Routine

Lab sample
810-180776-1

Laboratory
Eurofins Eaton Analytical South Bend in

Monitoring period
Jan 1, 2026 – Dec 31, 2026
- Monochloroacetic Acid 2450 EPA method 552.2
  
  Result
  Not detected below 2 ug/l Minimum Reporting Level
- Dichloroacetic Acid 2451 EPA method 552.2
  
  Result
  Not detected below 1 ug/l Minimum Reporting Level
- Trichloroacetic Acid 2452 EPA method 552.2
  
  Result
  Not detected below 1 ug/l Minimum Reporting Level
- Monobromoacetic Acid 2453 EPA method 552.2
  
  Result
  Not detected below 1 ug/l Minimum Reporting Level
- Dibromoacetic Acid 2454 EPA method 552.2
  
  Result
  Not detected below 1 ug/l Minimum Reporting Level
- Total Haloacetic Acids (Haa5) 2456 EPA method 552.2
  
  Result
  Not detected below 2 ug/l Minimum Reporting Level
Collected
Feb 11, 2026 08:15

Sampling point
TF102 Treatment Facility TF102

Sample type
Routine

Lab sample
NI-260212-010

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2026 – Dec 31, 2026
- Nitrate-Nitrite 1038 EPA method QC10107041C
  
  Result
  Not detected below 0.1 mg/l Minimum Reporting Level
- Nitrate 1040 EPA method QC10107041C
  
  Result
  Not detected below 0.08 mg/l Minimum Reporting Level
- Nitrite 1041 EPA method QC10107041C
  
  Result
  Not detected below 0.02 mg/l Minimum Reporting Level
Collected
Nov 19, 2025 13:50

Sampling point
SM2 Location withheld

Sample type
Routine

Lab sample
810-172734-1

Laboratory
Eurofins Eaton Analytical South Bend in
- Chloroform 2941 EPA method 524.2
  
  Result
  1.7 ug/l
  
  Monitoring period
  Not recorded
- Bromoform 2942 EPA method 524.2
  
  Result
  2 ug/l
  
  Monitoring period
  Not recorded
- Bromodichloromethane 2943 EPA method 524.2
  
  Result
  1.9 ug/l
  
  Monitoring period
  Not recorded
- Dibromochloromethane 2944 EPA method 524.2
  
  Result
  3.1 ug/l
  
  Monitoring period
  Not recorded
- TTHM 2950 EPA method 524.2
  
  Result
  8.7 ug/l
  
  Monitoring period
  Jan 1, 2025 – Dec 31, 2025
Collected
Sep 15, 2025 11:45

Sampling point
TF101 Treatment Plant T101

Sample type
Routine

Lab sample
CN-250916-002

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2023 – Dec 31, 2025
- Cyanide 1024 EPA method QC10204001X
  
  Result
  Not detected below 0.015 mg/l Minimum Reporting Level
Collected
Mar 24, 2025 13:00

Sampling point
TF102 Treatment Facility TF102

Sample type
Routine

Lab sample
NI-250325-047

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2025 – Dec 31, 2025
- Nitrate-Nitrite 1038 EPA method QC10107041C
  
  Result
  Not detected below 0.1 mg/l Minimum Reporting Level
- Nitrate 1040 EPA method QC10107041C
  
  Result
  Not detected below 0.08 mg/l Minimum Reporting Level
- Nitrite 1041 EPA method QC10107041C
  
  Result
  Not detected below 0.02 mg/l Minimum Reporting Level
Collected
Mar 24, 2025 12:45

Sampling point
TF101 Treatment Plant T101

Sample type
Routine

Lab sample
NI-250325-046

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2025 – Dec 31, 2025
- Nitrate-Nitrite 1038 EPA method QC10107041C
  
  Result
  Not detected below 0.1 mg/l Minimum Reporting Level
- Nitrate 1040 EPA method QC10107041C
  
  Result
  Not detected below 0.08 mg/l Minimum Reporting Level
- Nitrite 1041 EPA method QC10107041C
  
  Result
  Not detected below 0.02 mg/l Minimum Reporting Level
Collected
Mar 24, 2025 13:00

Sampling point
SM2 SM2

Sample type
Routine

Lab sample
HA-250325-014

Laboratory
MSDH Lab

Monitoring period
Not recorded
- Total Haloacetic Acids (Haa5) 2456 EPA method 552.2
  
  Result
  2.02 ug/l
Collected
Mar 17, 2025 12:10

Sampling point
TF101 Treatment Plant T101

Sample type
Routine

Lab sample
IN-250318-018

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2023 – Dec 31, 2025
- Arsenic 1005 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
- Barium 1010 EPA method 200.8
  
  Result
  0.0046 mg/l
- Cadmium 1015 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
- Chromium 1020 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
- Fluoride 1025 EPA method QC 10-109-12-2-A
  
  Result
  0.148 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 0.0005 mg/l Minimum Reporting Level
- Selenium 1045 EPA method 200.8
  
  Result
  Not detected below 0.0025 mg/l Minimum Reporting Level
- Antimony, Total 1074 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
- Beryllium, Total 1075 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
- Thallium, Total 1085 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
Collected
Feb 24, 2025 10:35

Sampling point
TF102 Treatment Facility TF102

Sample type
Routine

Lab sample
NA-250225-012

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2023 – Dec 31, 2025
- Sodium 1052 EPA method 200.7
  
  Result
  88.2 mg/l
Collected
Feb 24, 2025 10:35

Sampling point
TF101 Treatment Plant T101

Sample type
Routine

Lab sample
NA-250225-011

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2023 – Dec 31, 2025
- Sodium 1052 EPA method 200.7
  
  Result
  81.2 mg/l

Routine (10).