Chemical and radiological sample results

MS0070010 , Mt Comfort W/A

23 of the 57 analytes this system has been tested for have been detected at least once, across 328 samples on record.

The other 34 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 328 samples on record, detections range from September 20, 1993 to July 21, 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 Mt Comfort W/A, 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	162 of 196 results	Sep 20, 1993	Jul 21, 2026
Lead 1030	Inorganic Chemical	128 of 196 results	Sep 20, 1993	Jul 21, 2026
TTHM 2950	Organic Chemical	17 of 22 results	Jun 25, 2007	Nov 3, 2025
Bromoform 2942	Organic Chemical	14 of 17 results	Jul 11, 2011	Nov 3, 2025
Barium 1010	Inorganic Chemical	12 of 12 results	Jul 2, 2002	Jan 13, 2025
Fluoride 1025	Inorganic Chemical	12 of 12 results	Jul 2, 2002	Jan 13, 2025
Nickel 1036	Inorganic Chemical	10 of 12 results	Jul 2, 2002	Jan 13, 2025
Gross Alpha, Incl. Radon & U 4002	Radionuclide	10 of 10 results	Dec 7, 2011	Mar 23, 2016
Combined Radium (-226 & -228) 4010	Radionuclide	10 of 10 results	Dec 7, 2011	Mar 23, 2016
Radium-226 4020	Radionuclide	10 of 10 results	Dec 7, 2011	Mar 23, 2016
Arsenic 1005	Inorganic Chemical	9 of 12 results	Jul 2, 2002	Jan 13, 2025
Selenium 1045	Inorganic Chemical	9 of 12 results	Jul 2, 2002	May 3, 2022
Dibromochloromethane 2944	Organic Chemical	7 of 17 results	Dec 6, 2023	Nov 3, 2025
Chromium 1020	Inorganic Chemical	6 of 12 results	Feb 16, 2005	Jan 13, 2025
Total Haloacetic Acids (Haa5) 2456	Organic Chemical	5 of 24 results	Jun 25, 2007	Feb 8, 2022
Dibromoacetic Acid 2454	Organic Chemical	3 of 18 results	Aug 11, 2008	May 20, 2025
Sodium 1052	Inorganic Chemical	3 of 3 results	Sep 18, 2019	Oct 15, 2024
Xylenes, Total 2955	Organic Chemical	3 of 27 results	Sep 26, 2011	Apr 3, 2012
Bromodichloromethane 2943	Organic Chemical	2 of 17 results	May 20, 2025	May 20, 2025
Dichloroacetic Acid 2451	Organic Chemical	1 of 18 results	Aug 13, 2014	Aug 13, 2014
Monobromoacetic Acid 2453	Organic Chemical	1 of 18 results	Aug 13, 2014	Aug 13, 2014
Nitrate-Nitrite 1038	Inorganic Chemical	1 of 25 results	May 3, 2004	May 3, 2004
Nitrate 1040	Inorganic Chemical	1 of 25 results	May 3, 2004	May 3, 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 131–140 of 328 samples, newest first — collected December 8, 2015 to August 30, 2016. The summary above covers all 328.

40 results from the 10 samples listed here: 11 detected, 29 not detected. Across the whole record it is 436 of 1,433. 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 Mt Comfort W/A, every result from 131 to 140 of 328 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 Aug 30, 2016 06:00 Sampling point DS000 Distribution Sample type Routine Lab sample 160901-007PB Laboratory MSDH Lab
0.355 mg/l , sample collected Aug 30, 2016 06:00, sampling point DS000	Copper, Free 1022 EPA method 200.8	Jan 1, 2015 – Dec 31, 2017
0.0504 mg/l , sample collected Aug 30, 2016 06:00, sampling point DS000	Lead 1030 EPA method 200.8	Jan 1, 2015 – Dec 31, 2017
Collected Aug 29, 2016 17:00 Sampling point DS000 Distribution Sample type Routine Lab sample 160901-016PB Laboratory MSDH Lab
0.1539 mg/l , sample collected Aug 29, 2016 17:00, sampling point DS000	Copper, Free 1022 EPA method 200.8	Jan 1, 2015 – Dec 31, 2017
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 29, 2016 17:00, sampling point DS000	Lead 1030 EPA method 200.8	Jan 1, 2015 – Dec 31, 2017
Collected Aug 29, 2016 05:05 Sampling point DS000 Distribution Sample type Routine Lab sample 160901-011PB Laboratory MSDH Lab
0.116 mg/l , sample collected Aug 29, 2016 05:05, sampling point DS000	Copper, Free 1022 EPA method 200.8	Jan 1, 2015 – Dec 31, 2017
0.0007 mg/l , sample collected Aug 29, 2016 05:05, sampling point DS000	Lead 1030 EPA method 200.8	Jan 1, 2015 – Dec 31, 2017
Collected Aug 29, 2016 18:00 Sampling point DS000 Distribution Sample type Routine Lab sample 160901-010PB Laboratory MSDH Lab
0.4066 mg/l , sample collected Aug 29, 2016 18:00, sampling point DS000	Copper, Free 1022 EPA method 200.8	Jan 1, 2015 – Dec 31, 2017
0.0009 mg/l , sample collected Aug 29, 2016 18:00, sampling point DS000	Lead 1030 EPA method 200.8	Jan 1, 2015 – Dec 31, 2017
Collected Jun 20, 2016 03:45 Sampling point TF102 Treatment Facility TF102 Sample type Routine Lab sample 160621-003VO Laboratory MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 20, 2016 03:45, sampling point TF102	1,2,4-Trichlorobenzene 2378 EPA method 524.2	Jan 1, 2016 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 20, 2016 03:45, sampling point TF102	Cis-1,2-Dichloroethylene 2380 EPA method 524.2	Jan 1, 2016 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 20, 2016 03:45, sampling point TF102	Xylenes, Total 2955 EPA method 524.2	Jan 1, 2016 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 20, 2016 03:45, sampling point TF102	Dichloromethane 2964 EPA method 524.2	Jan 1, 2016 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 20, 2016 03:45, sampling point TF102	O-Dichlorobenzene 2968 EPA method 524.2	Jan 1, 2016 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 20, 2016 03:45, sampling point TF102	P-Dichlorobenzene 2969 EPA method 524.2	Jan 1, 2016 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 20, 2016 03:45, sampling point TF102	Vinyl Chloride 2976 EPA method 524.2	Jan 1, 2016 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 20, 2016 03:45, sampling point TF102	1,1-Dichloroethylene 2977 EPA method 524.2	Jan 1, 2016 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 20, 2016 03:45, sampling point TF102	Trans-1,2-Dichloroethylene 2979 EPA method 524.2	Jan 1, 2016 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 20, 2016 03:45, sampling point TF102	1,2-Dichloroethane 2980 EPA method 524.2	Jan 1, 2016 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 20, 2016 03:45, sampling point TF102	1,1,1-Trichloroethane 2981 EPA method 524.2	Jan 1, 2016 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 20, 2016 03:45, sampling point TF102	Carbon Tetrachloride 2982 EPA method 524.2	Jan 1, 2016 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 20, 2016 03:45, sampling point TF102	1,2-Dichloropropane 2983 EPA method 524.2	Jan 1, 2016 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 20, 2016 03:45, sampling point TF102	Trichloroethylene 2984 EPA method 524.2	Jan 1, 2016 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 20, 2016 03:45, sampling point TF102	1,1,2-Trichloroethane 2985 EPA method 524.2	Jan 1, 2016 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 20, 2016 03:45, sampling point TF102	Tetrachloroethylene 2987 EPA method 524.2	Jan 1, 2016 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 20, 2016 03:45, sampling point TF102	Chlorobenzene 2989 EPA method 524.2	Jan 1, 2016 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 20, 2016 03:45, sampling point TF102	Benzene 2990 EPA method 524.2	Jan 1, 2016 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 20, 2016 03:45, sampling point TF102	Toluene 2991 EPA method 524.2	Jan 1, 2016 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 20, 2016 03:45, sampling point TF102	Ethylbenzene 2992 EPA method 524.2	Jan 1, 2016 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 20, 2016 03:45, sampling point TF102	Styrene 2996 EPA method 524.2	Jan 1, 2016 – Dec 31, 2016
Collected Mar 23, 2016 09:30 Sampling point TF102 Treatment Facility TF102 Sample type Routine Lab sample 201603290091GA Laboratory Radiation Safety Engineering
2 pci/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 Mar 23, 2016 09:30, sampling point TF102	Gross Alpha, Incl. Radon & U 4002 EPA method 00-02	Jan 1, 2016 – Mar 31, 2016
Collected Mar 23, 2016 15:30 Sampling point TF102 Treatment Facility TF102 Sample type Routine Lab sample 201603290091 Laboratory Radiation Safety Engineering
0.6 pci/l The agency recorded which kind of limit this result was below, but stored nothing 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 Mar 23, 2016 15:30, sampling point TF102	Combined Radium (-226 & -228) 4010	Not recorded
0.6 pci/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 Mar 23, 2016 15:30, sampling point TF102	Radium-226 4020 EPA method 903.1	Jan 1, 2016 – Mar 31, 2016
Not detected below 0.4 pci/l Minimum Reporting Level , sample collected Mar 23, 2016 15:30, sampling point TF102	Radium-228 4030 EPA method 904	Jan 1, 2016 – Mar 31, 2016
Collected Mar 14, 2016 16:03 Sampling point TF102 Treatment Facility TF102 Sample type Routine Lab sample 160315-089NI Laboratory MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 14, 2016 16:03, sampling point TF102	Nitrate-Nitrite 1038 EPA method QC10107041C	Jan 1, 2016 – Dec 31, 2016
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 14, 2016 16:03, sampling point TF102	Nitrate 1040 EPA method QC10107041C	Jan 1, 2016 – Dec 31, 2016
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 14, 2016 16:03, sampling point TF102	Nitrite 1041 EPA method QC10107041C	Jan 1, 2016 – Dec 31, 2016
Collected Mar 14, 2016 16:03 Sampling point TF101 Treatment Plant T101 Sample type Routine Lab sample 160315-088NI Laboratory MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 14, 2016 16:03, sampling point TF101	Nitrate-Nitrite 1038 EPA method QC10107041C	Jan 1, 2016 – Dec 31, 2016
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 14, 2016 16:03, sampling point TF101	Nitrate 1040 EPA method QC10107041C	Jan 1, 2016 – Dec 31, 2016
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 14, 2016 16:03, sampling point TF101	Nitrite 1041 EPA method QC10107041C	Jan 1, 2016 – Dec 31, 2016
Collected Dec 8, 2015 13:37 Sampling point TF102 Treatment Facility TF102 Sample type Routine Lab sample 201512140049GA Laboratory Radiation Safety Engineering
3.6 pci/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 Dec 8, 2015 13:37, sampling point TF102	Gross Alpha, Incl. Radon & U 4002 EPA method 00-02	Oct 1, 2015 – Dec 31, 2015

Collected
Aug 30, 2016 06:00

Sampling point
DS000 Distribution

Sample type
Routine

Lab sample
160901-007PB

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2015 – Dec 31, 2017
- Copper, Free 1022 EPA method 200.8
  
  Result
  0.355 mg/l
- Lead 1030 EPA method 200.8
  
  Result
  0.0504 mg/l
Collected
Aug 29, 2016 17:00

Sampling point
DS000 Distribution

Sample type
Routine

Lab sample
160901-016PB

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2015 – Dec 31, 2017
- Copper, Free 1022 EPA method 200.8
  
  Result
  0.1539 mg/l
- Lead 1030 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
Collected
Aug 29, 2016 05:05

Sampling point
DS000 Distribution

Sample type
Routine

Lab sample
160901-011PB

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2015 – Dec 31, 2017
- Copper, Free 1022 EPA method 200.8
  
  Result
  0.116 mg/l
- Lead 1030 EPA method 200.8
  
  Result
  0.0007 mg/l
Collected
Aug 29, 2016 18:00

Sampling point
DS000 Distribution

Sample type
Routine

Lab sample
160901-010PB

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2015 – Dec 31, 2017
- Copper, Free 1022 EPA method 200.8
  
  Result
  0.4066 mg/l
- Lead 1030 EPA method 200.8
  
  Result
  0.0009 mg/l
Collected
Jun 20, 2016 03:45

Sampling point
TF102 Treatment Facility TF102

Sample type
Routine

Lab sample
160621-003VO

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2016 – Dec 31, 2016
- 1,2,4-Trichlorobenzene 2378 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- Cis-1,2-Dichloroethylene 2380 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- Xylenes, Total 2955 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- Dichloromethane 2964 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- O-Dichlorobenzene 2968 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- P-Dichlorobenzene 2969 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- Vinyl Chloride 2976 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- 1,1-Dichloroethylene 2977 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- Trans-1,2-Dichloroethylene 2979 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- 1,2-Dichloroethane 2980 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- 1,1,1-Trichloroethane 2981 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- Carbon Tetrachloride 2982 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- 1,2-Dichloropropane 2983 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- Trichloroethylene 2984 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- 1,1,2-Trichloroethane 2985 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- Tetrachloroethylene 2987 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- Chlorobenzene 2989 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- Benzene 2990 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- Toluene 2991 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- Ethylbenzene 2992 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- Styrene 2996 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
Collected
Mar 23, 2016 09:30

Sampling point
TF102 Treatment Facility TF102

Sample type
Routine

Lab sample
201603290091GA

Laboratory
Radiation Safety Engineering

Monitoring period
Jan 1, 2016 – Mar 31, 2016
- Gross Alpha, Incl. Radon & U 4002 EPA method 00-02
  
  Result
  2 pci/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.
Collected
Mar 23, 2016 15:30

Sampling point
TF102 Treatment Facility TF102

Sample type
Routine

Lab sample
201603290091

Laboratory
Radiation Safety Engineering
- Combined Radium (-226 & -228) 4010
  
  Result
  0.6 pci/l The agency recorded which kind of limit this result was below, but stored nothing 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.
  
  Monitoring period
  Not recorded
- Radium-226 4020 EPA method 903.1
  
  Result
  0.6 pci/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.
  
  Monitoring period
  Jan 1, 2016 – Mar 31, 2016
- Radium-228 4030 EPA method 904
  
  Result
  Not detected below 0.4 pci/l Minimum Reporting Level
  
  Monitoring period
  Jan 1, 2016 – Mar 31, 2016
Collected
Mar 14, 2016 16:03

Sampling point
TF102 Treatment Facility TF102

Sample type
Routine

Lab sample
160315-089NI

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2016 – Dec 31, 2016
- 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 14, 2016 16:03

Sampling point
TF101 Treatment Plant T101

Sample type
Routine

Lab sample
160315-088NI

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2016 – Dec 31, 2016
- 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
Dec 8, 2015 13:37

Sampling point
TF102 Treatment Facility TF102

Sample type
Routine

Lab sample
201512140049GA

Laboratory
Radiation Safety Engineering

Monitoring period
Oct 1, 2015 – Dec 31, 2015
- Gross Alpha, Incl. Radon & U 4002 EPA method 00-02
  
  Result
  3.6 pci/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.

Routine (10).