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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

MS0170019 , Walls Water Association

22 of the 58 analytes this system has been tested for have been detected at least once, across 281 samples on record.

The other 36 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 281 samples on record, detections range from September 9, 1993 to June 22, 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.

Every analyte ever detected for Walls Water Association, 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 100 of 110 results Sep 9, 1993 Sep 23, 2025
Lead 1030 Inorganic Chemical 47 of 110 results Sep 9, 1993 Sep 23, 2025
TTHM 2950 Organic Chemical 20 of 22 results May 19, 2004 Jan 22, 2026
Barium 1010 Inorganic Chemical 16 of 16 results May 14, 2002 Feb 4, 2025
Fluoride 1025 Inorganic Chemical 14 of 17 results May 14, 2002 Jun 22, 2026
Chloroform 2941 Organic Chemical 14 of 16 results Jul 11, 2007 Jan 22, 2026
Bromodichloromethane 2943 Organic Chemical 14 of 16 results Jul 11, 2007 Jan 22, 2026
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 13 of 23 results Jul 11, 2007 Feb 24, 2025
Dibromochloromethane 2944 Organic Chemical 9 of 16 results Jul 11, 2007 Jan 22, 2026
Chromium 1020 Inorganic Chemical 8 of 16 results Mar 2, 2005 Feb 4, 2025
Dichloroacetic Acid 2451 Organic Chemical 6 of 16 results Jul 12, 2012 Feb 15, 2024
Trichloroacetic Acid 2452 Organic Chemical 6 of 16 results Jul 12, 2012 Feb 15, 2024
Nickel 1036 Inorganic Chemical 6 of 16 results Jan 25, 2006 Apr 14, 2014
Gross Alpha, Incl. Radon & U 4002 Radionuclide 5 of 10 results Mar 7, 2012 Oct 4, 2012
Xylenes, Total 2955 Organic Chemical 5 of 44 results Oct 12, 2004 Jul 29, 2008
Sodium 1052 Inorganic Chemical 3 of 3 results Sep 17, 2019 Oct 15, 2024
Selenium 1045 Inorganic Chemical 3 of 16 results Mar 2, 2005 Nov 5, 2008
Cadmium 1015 Inorganic Chemical 2 of 16 results Mar 2, 2005 Jan 25, 2006
Sulfate 1055 Inorganic Chemical 2 of 2 results May 14, 2002 Jan 26, 2004
Nitrite 1041 Inorganic Chemical 1 of 35 results Jan 10, 2022 Jan 10, 2022
Monobromoacetic Acid 2453 Organic Chemical 1 of 16 results Jul 24, 2018 Jul 24, 2018
Arsenic 1005 Inorganic Chemical 1 of 16 results Jan 25, 2006 Jan 25, 2006

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 211–220 of 281 samples, newest first — collected March 22, 2007 to July 26, 2007. The summary above covers all 281.

80 results from the 10 samples listed here: 10 detected, 70 not detected. Across the whole record it is 296 of 1,687. 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 Walls Water Association, every result from 211 to 220 of 281 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
Jul 26, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070727-319PB
Laboratory
MSDH Lab
0.037 mg/l , sample collected Jul 26, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
0.0007 mg/l , sample collected Jul 26, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Collected
Jul 26, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070727-312PB
Laboratory
MSDH Lab
0.2345 mg/l , sample collected Jul 26, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 26, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Collected
Jul 26, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070727-300PB
Laboratory
MSDH Lab
0.0149 mg/l , sample collected Jul 26, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 26, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Collected
Jul 26, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070727-324PB
Laboratory
MSDH Lab
0.1117 mg/l , sample collected Jul 26, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 26, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Collected
Jul 11, 2007
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
070712-006HA
Laboratory
MSDH Lab
0.0096 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected Jul 11, 2007, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2005 – Dec 31, 2007
Collected
Jul 11, 2007
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
070712-008TH
Laboratory
MSDH Lab
5.66 ug/l , sample collected Jul 11, 2007, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 11, 2007, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
2.67 ug/l , sample collected Jul 11, 2007, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
1.31 ug/l , sample collected Jul 11, 2007, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
9.64 ug/l , sample collected Jul 11, 2007, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2005 – Dec 31, 2007
Collected
May 24, 2007
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
070525-022VO
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF101 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF101 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF101 Xylenes, Total 2955 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF101 Dichloromethane 2964 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF101 O-Dichlorobenzene 2968 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF101 P-Dichlorobenzene 2969 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF101 Vinyl Chloride 2976 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF101 1,1-Dichloroethylene 2977 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF101 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF101 1,2-Dichloroethane 2980 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF101 1,1,1-Trichloroethane 2981 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF101 Carbon Tetrachloride 2982 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF101 1,2-Dichloropropane 2983 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF101 Trichloroethylene 2984 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF101 1,1,2-Trichloroethane 2985 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF101 Tetrachloroethylene 2987 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF101 Chlorobenzene 2989 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF101 Benzene 2990 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF101 Toluene 2991 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF101 Ethylbenzene 2992 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF101 Styrene 2996 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Collected
May 24, 2007
Sampling point
TF102 Treatment Plant 102
Sample type
Routine
Lab sample
070525-023VO
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF102 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF102 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF102 Xylenes, Total 2955 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF102 Dichloromethane 2964 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF102 O-Dichlorobenzene 2968 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF102 P-Dichlorobenzene 2969 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF102 Vinyl Chloride 2976 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF102 1,1-Dichloroethylene 2977 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF102 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF102 1,2-Dichloroethane 2980 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF102 1,1,1-Trichloroethane 2981 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF102 Carbon Tetrachloride 2982 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF102 1,2-Dichloropropane 2983 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF102 Trichloroethylene 2984 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF102 1,1,2-Trichloroethane 2985 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF102 Tetrachloroethylene 2987 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF102 Chlorobenzene 2989 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF102 Benzene 2990 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF102 Toluene 2991 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF102 Ethylbenzene 2992 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected May 24, 2007, sampling point TF102 Styrene 2996 EPA method 524.2 Apr 1, 2007 – Jun 30, 2007
Collected
Apr 16, 2007
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
070417-193NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 16, 2007, sampling point TF101 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2007 – Dec 31, 2007
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Apr 16, 2007, sampling point TF101 Nitrate 1040 EPA method 353.2 Jan 1, 2007 – Dec 31, 2007
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 16, 2007, sampling point TF101 Nitrite 1041 EPA method 353.2 Jan 1, 2007 – Dec 31, 2007
Collected
Mar 22, 2007
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
070323-018VO
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 22, 2007, sampling point TF101 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2007 – Mar 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 22, 2007, sampling point TF101 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2007 – Mar 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 22, 2007, sampling point TF101 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2007 – Mar 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 22, 2007, sampling point TF101 Dichloromethane 2964 EPA method 524.2 Jan 1, 2007 – Mar 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 22, 2007, sampling point TF101 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2007 – Mar 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 22, 2007, sampling point TF101 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2007 – Mar 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 22, 2007, sampling point TF101 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2007 – Mar 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 22, 2007, sampling point TF101 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2007 – Mar 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 22, 2007, sampling point TF101 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2007 – Mar 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 22, 2007, sampling point TF101 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2007 – Mar 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 22, 2007, sampling point TF101 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2007 – Mar 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 22, 2007, sampling point TF101 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2007 – Mar 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 22, 2007, sampling point TF101 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2007 – Mar 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 22, 2007, sampling point TF101 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2007 – Mar 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 22, 2007, sampling point TF101 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2007 – Mar 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 22, 2007, sampling point TF101 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2007 – Mar 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 22, 2007, sampling point TF101 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2007 – Mar 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 22, 2007, sampling point TF101 Benzene 2990 EPA method 524.2 Jan 1, 2007 – Mar 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 22, 2007, sampling point TF101 Toluene 2991 EPA method 524.2 Jan 1, 2007 – Mar 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 22, 2007, sampling point TF101 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2007 – Mar 31, 2007
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 22, 2007, sampling point TF101 Styrene 2996 EPA method 524.2 Jan 1, 2007 – Mar 31, 2007

Routine (10).