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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

MS0540023 , Eureka Water Association

23 of the 62 analytes this system has been tested for have been detected at least once, across 162 samples on record.

The other 39 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 162 samples on record, detections range from October 13, 2003 to December 9, 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 Eureka 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 66 of 66 results Aug 9, 2007 Sep 26, 2023
Lead 1030 Inorganic Chemical 22 of 66 results Aug 9, 2007 Sep 26, 2023
Barium 1010 Inorganic Chemical 10 of 10 results Oct 13, 2003 Mar 26, 2025
TTHM 2950 Organic Chemical 9 of 19 results Jul 28, 2004 Dec 9, 2025
Dibromochloromethane 2944 Organic Chemical 6 of 14 results Jun 16, 2010 Dec 9, 2025
Chromium 1020 Inorganic Chemical 5 of 10 results Oct 13, 2003 Mar 26, 2025
Gross Alpha, Incl. Radon & U 4002 Radionuclide 5 of 5 results Dec 13, 2011 Jul 19, 2012
Nickel 1036 Inorganic Chemical 4 of 10 results Mar 15, 2004 Mar 26, 2025
Sulfate 1055 Inorganic Chemical 4 of 4 results Oct 13, 2003 Jun 3, 2021
Sodium 1052 Inorganic Chemical 3 of 3 results Oct 15, 2019 Jun 3, 2021
Calcium 1016 Inorganic Chemical 2 of 2 results Jun 3, 2021 Jun 3, 2021
Chloride 1017 Inorganic Chemical 2 of 2 results Jun 3, 2021 Jun 3, 2021
Fluoride 1025 Inorganic Chemical 2 of 12 results Jun 3, 2021 Jun 3, 2021
Conductivity @ 25 C Umhos/CM 1064 Water Quality 2 of 2 results Jun 3, 2021 Jun 3, 2021
Color 1905 Water Quality 2 of 2 results Jun 3, 2021 Jun 3, 2021
Alkalinity, Total 1927 Water Quality 2 of 2 results Jun 3, 2021 Jun 3, 2021
Bromoform 2942 Organic Chemical 2 of 14 results Jun 16, 2010 Aug 29, 2013
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 2 of 19 results Sep 4, 2007 Jun 16, 2010
Selenium 1045 Inorganic Chemical 2 of 10 results Mar 15, 2004 Apr 11, 2005
Bromodichloromethane 2943 Organic Chemical 1 of 14 results Aug 29, 2013 Aug 29, 2013
Cadmium 1015 Inorganic Chemical 1 of 10 results Apr 11, 2005 Apr 11, 2005
Dichloromethane 2964 Organic Chemical 1 of 13 results Aug 25, 2004 Aug 25, 2004
Beryllium, Total 1075 Inorganic Chemical 1 of 10 results Mar 15, 2004 Mar 15, 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 161–162 of 162 samples, newest first — collected March 28, 2002 to September 9, 2002. The summary above covers all 162.

42 results from the 2 samples listed here: 0 detected, 42 not detected. 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 Eureka Water Association, every result from 161 to 162 of 162 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 9, 2002
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
020910-003VO
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 9, 2002, sampling point TF080 1,2,4-Trichlorobenzene 2378 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 9, 2002, sampling point TF080 Cis-1,2-Dichloroethylene 2380 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 9, 2002, sampling point TF080 Xylenes, Total 2955 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 9, 2002, sampling point TF080 Dichloromethane 2964 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 9, 2002, sampling point TF080 O-Dichlorobenzene 2968 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 9, 2002, sampling point TF080 P-Dichlorobenzene 2969 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 9, 2002, sampling point TF080 Vinyl Chloride 2976 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 9, 2002, sampling point TF080 1,1-Dichloroethylene 2977 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 9, 2002, sampling point TF080 Trans-1,2-Dichloroethylene 2979 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 9, 2002, sampling point TF080 1,2-Dichloroethane 2980 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 9, 2002, sampling point TF080 1,1,1-Trichloroethane 2981 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 9, 2002, sampling point TF080 Carbon Tetrachloride 2982 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 9, 2002, sampling point TF080 1,2-Dichloropropane 2983 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 9, 2002, sampling point TF080 Trichloroethylene 2984 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 9, 2002, sampling point TF080 1,1,2-Trichloroethane 2985 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 9, 2002, sampling point TF080 Tetrachloroethylene 2987 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 9, 2002, sampling point TF080 Chlorobenzene 2989 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 9, 2002, sampling point TF080 Benzene 2990 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 9, 2002, sampling point TF080 Toluene 2991 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 9, 2002, sampling point TF080 Ethylbenzene 2992 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 9, 2002, sampling point TF080 Styrene 2996 Not recorded
Collected
Mar 28, 2002
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
020329-008VO
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 28, 2002, sampling point TF080 1,2,4-Trichlorobenzene 2378 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 28, 2002, sampling point TF080 Cis-1,2-Dichloroethylene 2380 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 28, 2002, sampling point TF080 Xylenes, Total 2955 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 28, 2002, sampling point TF080 Dichloromethane 2964 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 28, 2002, sampling point TF080 O-Dichlorobenzene 2968 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 28, 2002, sampling point TF080 P-Dichlorobenzene 2969 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 28, 2002, sampling point TF080 Vinyl Chloride 2976 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 28, 2002, sampling point TF080 1,1-Dichloroethylene 2977 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 28, 2002, sampling point TF080 Trans-1,2-Dichloroethylene 2979 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 28, 2002, sampling point TF080 1,2-Dichloroethane 2980 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 28, 2002, sampling point TF080 1,1,1-Trichloroethane 2981 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 28, 2002, sampling point TF080 Carbon Tetrachloride 2982 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 28, 2002, sampling point TF080 1,2-Dichloropropane 2983 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 28, 2002, sampling point TF080 Trichloroethylene 2984 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 28, 2002, sampling point TF080 1,1,2-Trichloroethane 2985 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 28, 2002, sampling point TF080 Tetrachloroethylene 2987 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 28, 2002, sampling point TF080 Chlorobenzene 2989 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 28, 2002, sampling point TF080 Benzene 2990 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 28, 2002, sampling point TF080 Toluene 2991 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 28, 2002, sampling point TF080 Ethylbenzene 2992 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 28, 2002, sampling point TF080 Styrene 2996 Not recorded

Routine (2).