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
MS0560006 , Arlington W/A
22 of the 57 analytes this system has been tested for have been detected at least once, across 179 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 179 samples on record, detections range from October 15, 2003 to May 13, 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.
| Analyte | Kind | Detected in | First detected | Last detected |
|---|---|---|---|---|
| Copper, Free 1022 | Inorganic Chemical | 76 of 76 results | Aug 9, 2007 | Aug 13, 2024 |
| Lead 1030 | Inorganic Chemical | 18 of 76 results | Aug 9, 2007 | Aug 13, 2024 |
| TTHM 2950 | Organic Chemical | 16 of 20 results | Aug 2, 2004 | May 13, 2026 |
| Barium 1010 | Inorganic Chemical | 15 of 15 results | Oct 15, 2003 | Apr 9, 2025 |
| Fluoride 1025 | Inorganic Chemical | 11 of 15 results | Oct 15, 2003 | Feb 14, 2024 |
| Bromodichloromethane 2943 | Organic Chemical | 9 of 14 results | Feb 21, 2024 | May 13, 2026 |
| Dibromochloromethane 2944 | Organic Chemical | 9 of 14 results | Feb 21, 2024 | May 13, 2026 |
| Chromium 1020 | Inorganic Chemical | 8 of 15 results | Oct 15, 2003 | Apr 9, 2025 |
| Bromoform 2942 | Organic Chemical | 7 of 14 results | Feb 21, 2024 | Nov 20, 2024 |
| Total Haloacetic Acids (Haa5) 2456 | Organic Chemical | 6 of 21 results | Jun 21, 2010 | Feb 5, 2025 |
| Chloroform 2941 | Organic Chemical | 6 of 14 results | Feb 21, 2024 | Nov 20, 2024 |
| Arsenic 1005 | Inorganic Chemical | 6 of 15 results | Dec 15, 2020 | Feb 14, 2024 |
| Gross Alpha, Incl. Radon & U 4002 | Radionuclide | 5 of 5 results | Dec 12, 2011 | Jul 20, 2012 |
| Nickel 1036 | Inorganic Chemical | 3 of 15 results | May 8, 2013 | Apr 9, 2025 |
| Sodium 1052 | Inorganic Chemical | 3 of 3 results | Oct 1, 2019 | Feb 25, 2025 |
| Dichloroacetic Acid 2451 | Organic Chemical | 2 of 15 results | Mar 4, 2020 | Nov 20, 2024 |
| Sulfate 1055 | Inorganic Chemical | 2 of 2 results | Oct 15, 2003 | Mar 15, 2004 |
| Nitrate-Nitrite 1038 | Inorganic Chemical | 1 of 20 results | Apr 1, 2025 | Apr 1, 2025 |
| Nitrate 1040 | Inorganic Chemical | 1 of 20 results | Apr 1, 2025 | Apr 1, 2025 |
| Selenium 1045 | Inorganic Chemical | 1 of 15 results | Mar 20, 2006 | Mar 20, 2006 |
| Thallium, Total 1085 | Inorganic Chemical | 1 of 15 results | Apr 13, 2005 | Apr 13, 2005 |
| Xylenes, Total 2955 | Organic Chemical | 1 of 14 results | May 25, 2004 | May 25, 2004 |
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 1–10 of 179 samples, newest first — collected November 20, 2024 to May 13, 2026. The summary above covers all 179.
51 results from the 10 samples listed here: 16 detected, 35 not detected. Across the whole record it is 207 of 882. 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.
| Result | Analyte | Monitoring period |
|---|---|---|
|
||
| Not detected below 2 ug/l Minimum Reporting Level , sample collected May 13, 2026 13:00, sampling point MRT000 | Monochloroacetic Acid 2450 EPA method 552.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected May 13, 2026 13:00, sampling point MRT000 | Dichloroacetic Acid 2451 EPA method 552.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected May 13, 2026 13:00, sampling point MRT000 | Trichloroacetic Acid 2452 EPA method 552.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected May 13, 2026 13:00, sampling point MRT000 | Monobromoacetic Acid 2453 EPA method 552.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected May 13, 2026 13:00, sampling point MRT000 | Dibromoacetic Acid 2454 EPA method 552.2 | Not recorded |
| Not detected below 2 ug/l Minimum Reporting Level , sample collected May 13, 2026 13:00, sampling point MRT000 | Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 | Not recorded |
| Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 13, 2026 13:00, sampling point MRT000 | Chloroform 2941 EPA method 524.2 | Not recorded |
| Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 13, 2026 13:00, sampling point MRT000 | Bromoform 2942 EPA method 524.2 | Not recorded |
| 0.53 ug/l , sample collected May 13, 2026 13:00, sampling point MRT000 | Bromodichloromethane 2943 EPA method 524.2 | Not recorded |
| 0.82 ug/l , sample collected May 13, 2026 13:00, sampling point MRT000 | Dibromochloromethane 2944 EPA method 524.2 | Not recorded |
| 1.35 ug/l , sample collected May 13, 2026 13:00, sampling point MRT000 | TTHM 2950 EPA method 524.2 | Not recorded |
|
||
| Not detected below 2 ug/l Minimum Reporting Level , sample collected Feb 3, 2026 13:00, sampling point SM2 | Monochloroacetic Acid 2450 EPA method 552.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 3, 2026 13:00, sampling point SM2 | Dichloroacetic Acid 2451 EPA method 552.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 3, 2026 13:00, sampling point SM2 | Trichloroacetic Acid 2452 EPA method 552.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 3, 2026 13:00, sampling point SM2 | Monobromoacetic Acid 2453 EPA method 552.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 3, 2026 13:00, sampling point SM2 | Dibromoacetic Acid 2454 EPA method 552.2 | Not recorded |
| Not detected below 2 ug/l Minimum Reporting Level , sample collected Feb 3, 2026 13:00, sampling point SM2 | Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 | Jan 1, 2026 – Dec 31, 2026 |
| Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 3, 2026 13:00, sampling point SM2 | Chloroform 2941 EPA method 524.2 | Not recorded |
| Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 3, 2026 13:00, sampling point SM2 | Bromoform 2942 EPA method 524.2 | Not recorded |
| Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 3, 2026 13:00, sampling point SM2 | Bromodichloromethane 2943 EPA method 524.2 | Not recorded |
| Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 3, 2026 13:00, sampling point SM2 | Dibromochloromethane 2944 EPA method 524.2 | Not recorded |
| Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 3, 2026 13:00, sampling point SM2 | TTHM 2950 EPA method 524.2 | Jan 1, 2026 – Dec 31, 2026 |
|
||
| Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Sep 29, 2025 12:20, sampling point TF101 | Cyanide 1024 EPA method QC10204001X | Jan 1, 2023 – Dec 31, 2025 |
|
||
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 17, 2025 13:35, sampling point TF101 | Mercury 1035 EPA method 200.8 | Jan 1, 2025 – Dec 31, 2025 |
|
||
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2025 14:17, sampling point TF101 | Arsenic 1005 EPA method 200.8 | Jan 1, 2025 – Dec 31, 2025 |
| 0.0662 mg/l , sample collected Apr 9, 2025 14:17, sampling point TF101 | Barium 1010 EPA method 200.8 | Jan 1, 2025 – Dec 31, 2025 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2025 14:17, sampling point TF101 | Cadmium 1015 EPA method 200.8 | Jan 1, 2025 – Dec 31, 2025 |
| 0.0016 mg/l , sample collected Apr 9, 2025 14:17, sampling point TF101 | Chromium 1020 EPA method 200.8 | Jan 1, 2025 – Dec 31, 2025 |
| Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 9, 2025 14:17, sampling point TF101 | Fluoride 1025 EPA method QC 10-109-12-2-A | Jan 1, 2025 – Dec 31, 2025 |
| 0.0011 mg/l , sample collected Apr 9, 2025 14:17, sampling point TF101 | Nickel 1036 EPA method 200.8 | Not recorded |
| Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Apr 9, 2025 14:17, sampling point TF101 | Selenium 1045 EPA method 200.8 | Jan 1, 2025 – Dec 31, 2025 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2025 14:17, sampling point TF101 | Antimony, Total 1074 EPA method 200.8 | Jan 1, 2025 – Dec 31, 2025 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2025 14:17, sampling point TF101 | Beryllium, Total 1075 EPA method 200.8 | Jan 1, 2025 – Dec 31, 2025 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2025 14:17, sampling point TF101 | Thallium, Total 1085 EPA method 200.8 | Jan 1, 2025 – Dec 31, 2025 |
|
||
| 0.181 mg/l , sample collected Apr 1, 2025 14:38, sampling point TF101 | Nitrate-Nitrite 1038 EPA method QC10107041C | Jan 1, 2025 – Dec 31, 2025 |
| 0.181 mg/l , sample collected Apr 1, 2025 14:38, 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 Apr 1, 2025 14:38, sampling point TF101 | Nitrite 1041 EPA method QC10107041C | Jan 1, 2025 – Dec 31, 2025 |
|
||
| 113 mg/l , sample collected Feb 25, 2025 13:03, sampling point TF101 | Sodium 1052 EPA method 200.7 | Jan 1, 2023 – Dec 31, 2025 |
|
||
| 13.4 ug/l , sample collected Feb 5, 2025 13:32, sampling point SM2 | Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 | Jan 1, 2025 – Dec 31, 2025 |
|
||
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 5, 2025 13:32, sampling point SM2 | TTHM 2950 EPA method 524.2 | Jan 1, 2025 – Dec 31, 2025 |
|
||
| Not detected below 2 ug/l Minimum Reporting Level , sample collected Nov 20, 2024, sampling point SM2 | Monochloroacetic Acid 2450 EPA method 552.2 | Not recorded |
| 1.1 ug/l , sample collected Nov 20, 2024, sampling point SM2 | Dichloroacetic Acid 2451 EPA method 552.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Nov 20, 2024, sampling point SM2 | Trichloroacetic Acid 2452 EPA method 552.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Nov 20, 2024, sampling point SM2 | Monobromoacetic Acid 2453 EPA method 552.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Nov 20, 2024, sampling point SM2 | Dibromoacetic Acid 2454 EPA method 552.2 | Not recorded |
| Not detected below 2 ug/l Minimum Reporting Level , sample collected Nov 20, 2024, sampling point SM2 | Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 | Oct 1, 2024 – Dec 31, 2024 |
| 1.7 ug/l , sample collected Nov 20, 2024, sampling point SM2 | Chloroform 2941 EPA method 524.2 | Not recorded |
| 0.76 ug/l , sample collected Nov 20, 2024, sampling point SM2 | Bromoform 2942 EPA method 524.2 | Not recorded |
| 2.6 ug/l , sample collected Nov 20, 2024, sampling point SM2 | Bromodichloromethane 2943 EPA method 524.2 | Not recorded |
| 2.7 ug/l , sample collected Nov 20, 2024, sampling point SM2 | Dibromochloromethane 2944 EPA method 524.2 | Not recorded |
| 7.76 ug/l , sample collected Nov 20, 2024, sampling point SM2 | TTHM 2950 EPA method 524.2 | Oct 1, 2024 – Dec 31, 2024 |
-
- Collected
- May 13, 2026 13:00
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 810-192136-1
- Laboratory
- Eurofins Eaton Analytical South Bend in
- Monitoring period
- Not recorded
-
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
-
Chloroform 2941 EPA method 524.2
- Result
- Not detected below 0.5 ug/l Minimum Reporting Level
-
Bromoform 2942 EPA method 524.2
- Result
- Not detected below 0.5 ug/l Minimum Reporting Level
-
Bromodichloromethane 2943 EPA method 524.2
- Result
- 0.53 ug/l
-
Dibromochloromethane 2944 EPA method 524.2
- Result
- 0.82 ug/l
-
TTHM 2950 EPA method 524.2
- Result
- 1.35 ug/l
-
- Collected
- Feb 3, 2026 13:00
- Sampling point
- SM2 Location withheld
- Sample type
- Routine
- Lab sample
- 810-179764-1
- 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
- Jan 1, 2026 – Dec 31, 2026
-
Chloroform 2941 EPA method 524.2
- Result
- Not detected below 0.5 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Bromoform 2942 EPA method 524.2
- Result
- Not detected below 0.5 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Bromodichloromethane 2943 EPA method 524.2
- Result
- Not detected below 0.5 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dibromochloromethane 2944 EPA method 524.2
- Result
- Not detected below 0.5 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
TTHM 2950 EPA method 524.2
- Result
- Not detected below 0.5 ug/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2026 – Dec 31, 2026
-
- Collected
- Sep 29, 2025 12:20
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- CN-250930-036
- 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
- Sep 17, 2025 13:35
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- IN-250918-003
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2025 – Dec 31, 2025
-
Mercury 1035 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Apr 9, 2025 14:17
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- IN-250410-038
- Laboratory
- MSDH Lab
-
Arsenic 1005 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2025 – Dec 31, 2025
-
Barium 1010 EPA method 200.8
- Result
- 0.0662 mg/l
- Monitoring period
- Jan 1, 2025 – Dec 31, 2025
-
Cadmium 1015 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2025 – Dec 31, 2025
-
Chromium 1020 EPA method 200.8
- Result
- 0.0016 mg/l
- Monitoring period
- Jan 1, 2025 – Dec 31, 2025
-
Fluoride 1025 EPA method QC 10-109-12-2-A
- Result
- Not detected below 0.1 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2025 – Dec 31, 2025
-
Nickel 1036 EPA method 200.8
- Result
- 0.0011 mg/l
- Monitoring period
- Not recorded
-
Selenium 1045 EPA method 200.8
- Result
- Not detected below 0.0025 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2025 – Dec 31, 2025
-
Antimony, Total 1074 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2025 – Dec 31, 2025
-
Beryllium, Total 1075 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2025 – Dec 31, 2025
-
Thallium, Total 1085 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2025 – Dec 31, 2025
-
- Collected
- Apr 1, 2025 14:38
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- NI-250402-002
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2025 – Dec 31, 2025
-
Nitrate-Nitrite 1038 EPA method QC10107041C
- Result
- 0.181 mg/l
-
Nitrate 1040 EPA method QC10107041C
- Result
- 0.181 mg/l
-
Nitrite 1041 EPA method QC10107041C
- Result
- Not detected below 0.02 mg/l Minimum Reporting Level
-
- Collected
- Feb 25, 2025 13:03
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- NA-250226-031
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2023 – Dec 31, 2025
-
Sodium 1052 EPA method 200.7
- Result
- 113 mg/l
-
- Collected
- Feb 5, 2025 13:32
- Sampling point
- SM2 Location withheld
- Sample type
- Routine
- Lab sample
- HA-250206-058
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2025 – Dec 31, 2025
-
Total Haloacetic Acids (Haa5) 2456 EPA method 552.2
- Result
- 13.4 ug/l
-
- Collected
- Feb 5, 2025 13:32
- Sampling point
- SM2 Location withheld
- Sample type
- Routine
- Lab sample
- TH-250206-058
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2025 – Dec 31, 2025
-
TTHM 2950 EPA method 524.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
-
- Collected
- Nov 20, 2024
- Sampling point
- SM2 Location withheld
- Sample type
- Routine
- Lab sample
- 810-129020-2
- 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
- 1.1 ug/l
- 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
- 1.7 ug/l
- Monitoring period
- Not recorded
-
Bromoform 2942 EPA method 524.2
- Result
- 0.76 ug/l
- Monitoring period
- Not recorded
-
Bromodichloromethane 2943 EPA method 524.2
- Result
- 2.6 ug/l
- Monitoring period
- Not recorded
-
Dibromochloromethane 2944 EPA method 524.2
- Result
- 2.7 ug/l
- Monitoring period
- Not recorded
-
TTHM 2950 EPA method 524.2
- Result
- 7.76 ug/l
- Monitoring period
- Oct 1, 2024 – Dec 31, 2024
Routine (10).