Chemical and radiological sample results

MS0450024 , PRVWSD-Twin Harbor

28 of the 56 analytes this system has been tested for have been detected at least once, across 310 samples on record.

The other 28 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 310 samples on record, detections range from October 6, 2003 to November 20, 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 PRVWSD-Twin Harbor, 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	135 of 135 results	Jun 29, 2004	Aug 20, 2024
Lead 1030	Inorganic Chemical	67 of 135 results	Jun 29, 2004	Aug 20, 2024
TTHM 2950	Organic Chemical	21 of 21 results	Jul 12, 2004	Nov 20, 2025
Total Haloacetic Acids (Haa5) 2456	Organic Chemical	20 of 21 results	Aug 22, 2007	Nov 20, 2025
Barium 1010	Inorganic Chemical	17 of 17 results	Oct 6, 2003	Mar 11, 2025
Chloroform 2941	Organic Chemical	16 of 16 results	Aug 22, 2007	Nov 20, 2025
Bromodichloromethane 2943	Organic Chemical	16 of 16 results	Aug 22, 2007	Nov 20, 2025
Fluoride 1025	Inorganic Chemical	16 of 17 results	Oct 6, 2003	Mar 11, 2025
Dichloroacetic Acid 2451	Organic Chemical	14 of 15 results	Sep 28, 2009	Nov 20, 2025
Trichloroacetic Acid 2452	Organic Chemical	14 of 15 results	Sep 28, 2009	Nov 20, 2025
Dibromochloromethane 2944	Organic Chemical	11 of 16 results	Aug 7, 2013	Nov 14, 2024
Xylenes, Total 2955	Organic Chemical	7 of 33 results	Mar 29, 2004	Aug 15, 2007
Sodium 1052	Inorganic Chemical	6 of 6 results	Sep 16, 2019	Feb 24, 2025
Ethylbenzene 2992	Organic Chemical	6 of 33 results	Mar 29, 2004	May 30, 2007
Chromium 1020	Inorganic Chemical	5 of 17 results	Oct 6, 2003	Feb 3, 2010
Toluene 2991	Organic Chemical	5 of 33 results	Mar 29, 2004	May 11, 2006
Cadmium 1015	Inorganic Chemical	3 of 17 results	Mar 8, 2004	Apr 11, 2005
Combined Radium (-226 & -228) 4010	Radionuclide	2 of 12 results	Jun 12, 2018	Sep 12, 2019
Radium-226 4020	Radionuclide	2 of 12 results	Jun 12, 2018	Sep 12, 2019
Radium-228 4030	Radionuclide	2 of 12 results	Jun 12, 2018	Sep 12, 2019
Nitrate 1040	Inorganic Chemical	2 of 44 results	Jul 24, 2006	Jul 24, 2006
Selenium 1045	Inorganic Chemical	2 of 17 results	Apr 11, 2005	Apr 11, 2005
Sulfate 1055	Inorganic Chemical	2 of 2 results	Oct 6, 2003	Mar 8, 2004
Monobromoacetic Acid 2453	Organic Chemical	1 of 15 results	Sep 14, 2020	Sep 14, 2020
Dibromoacetic Acid 2454	Organic Chemical	1 of 15 results	Sep 18, 2018	Sep 18, 2018
Bromoform 2942	Organic Chemical	1 of 16 results	Sep 18, 2018	Sep 18, 2018
Nitrate-Nitrite 1038	Inorganic Chemical	1 of 44 results	Jul 24, 2006	Jul 24, 2006
Nickel 1036	Inorganic Chemical	1 of 17 results	Mar 8, 2004	Mar 8, 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 91–100 of 310 samples, newest first — collected July 7, 2016 to September 11, 2018. The summary above covers all 310.

46 results from the 10 samples listed here: 9 detected, 37 not detected. Across the whole record it is 396 of 1,546. 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 PRVWSD-Twin Harbor, every result from 91 to 100 of 310 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 11, 2018 04:45 Sampling point DS000 Distribution Sample type Routine Lab sample 180918-003PB Laboratory MSDH Lab
0.3831 mg/l , sample collected Sep 11, 2018 04:45, sampling point DS000	Copper, Free 1022 EPA method 200.8	Jan 1, 2016 – Dec 31, 2018
0.0024 mg/l , sample collected Sep 11, 2018 04:45, sampling point DS000	Lead 1030 EPA method 200.8	Jan 1, 2016 – Dec 31, 2018
Collected Sep 11, 2018 04:30 Sampling point DS000 Distribution Sample type Routine Lab sample 180918-002PB Laboratory MSDH Lab
0.13 mg/l , sample collected Sep 11, 2018 04:30, sampling point DS000	Copper, Free 1022 EPA method 200.8	Jan 1, 2016 – Dec 31, 2018
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 11, 2018 04:30, sampling point DS000	Lead 1030 EPA method 200.8	Jan 1, 2016 – Dec 31, 2018
Collected Sep 10, 2018 11:15 Sampling point TF103 Sample type Routine Lab sample 180911-008VO Laboratory MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 10, 2018 11:15, sampling point TF103	1,2,4-Trichlorobenzene 2378 EPA method 524.2	Jan 1, 2013 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 10, 2018 11:15, sampling point TF103	Cis-1,2-Dichloroethylene 2380 EPA method 524.2	Jan 1, 2013 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 10, 2018 11:15, sampling point TF103	Xylenes, Total 2955 EPA method 524.2	Jan 1, 2013 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 10, 2018 11:15, sampling point TF103	Dichloromethane 2964 EPA method 524.2	Jan 1, 2013 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 10, 2018 11:15, sampling point TF103	O-Dichlorobenzene 2968 EPA method 524.2	Jan 1, 2013 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 10, 2018 11:15, sampling point TF103	P-Dichlorobenzene 2969 EPA method 524.2	Jan 1, 2013 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 10, 2018 11:15, sampling point TF103	Vinyl Chloride 2976 EPA method 524.2	Jan 1, 2013 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 10, 2018 11:15, sampling point TF103	1,1-Dichloroethylene 2977 EPA method 524.2	Jan 1, 2013 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 10, 2018 11:15, sampling point TF103	Trans-1,2-Dichloroethylene 2979 EPA method 524.2	Jan 1, 2013 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 10, 2018 11:15, sampling point TF103	1,2-Dichloroethane 2980 EPA method 524.2	Jan 1, 2013 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 10, 2018 11:15, sampling point TF103	1,1,1-Trichloroethane 2981 EPA method 524.2	Jan 1, 2013 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 10, 2018 11:15, sampling point TF103	Carbon Tetrachloride 2982 EPA method 524.2	Jan 1, 2013 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 10, 2018 11:15, sampling point TF103	1,2-Dichloropropane 2983 EPA method 524.2	Jan 1, 2013 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 10, 2018 11:15, sampling point TF103	Trichloroethylene 2984 EPA method 524.2	Jan 1, 2013 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 10, 2018 11:15, sampling point TF103	1,1,2-Trichloroethane 2985 EPA method 524.2	Jan 1, 2013 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 10, 2018 11:15, sampling point TF103	Tetrachloroethylene 2987 EPA method 524.2	Jan 1, 2013 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 10, 2018 11:15, sampling point TF103	Chlorobenzene 2989 EPA method 524.2	Jan 1, 2013 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 10, 2018 11:15, sampling point TF103	Benzene 2990 EPA method 524.2	Jan 1, 2013 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 10, 2018 11:15, sampling point TF103	Toluene 2991 EPA method 524.2	Jan 1, 2013 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 10, 2018 11:15, sampling point TF103	Ethylbenzene 2992 EPA method 524.2	Jan 1, 2013 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 10, 2018 11:15, sampling point TF103	Styrene 2996 EPA method 524.2	Jan 1, 2013 – Dec 31, 2018
Collected Jun 12, 2018 10:00 Sampling point TF103 Sample type Routine Lab sample 3961311 Laboratory Eurofins Eaton Analytical South Bend in
Not detected below 2.6 pci/l Minimum Reporting Level , sample collected Jun 12, 2018 10:00, sampling point TF103	Gross Alpha, Incl. Radon & U 4002 EPA method 7110B	Jan 1, 2013 – Dec 31, 2021
Collected Jun 12, 2018 10:00 Sampling point TF103 Sample type Routine Lab sample 3961310 Laboratory Eurofins Eaton Analytical South Bend in
2.93 pci/l , sample collected Jun 12, 2018 10:00, sampling point TF103	Combined Radium (-226 & -228) 4010 EPA method 7500-RA	Not recorded
0.43 pci/l , sample collected Jun 12, 2018 10:00, sampling point TF103	Radium-226 4020 EPA method 7500-RAB	Jan 1, 2013 – Dec 31, 2018
2.5 pci/l , sample collected Jun 12, 2018 10:00, sampling point TF103	Radium-228 4030 EPA method 7500-RAD	Jan 1, 2013 – Dec 31, 2018
Collected Mar 7, 2018 09:44 Sampling point TF103 Sample type Routine Lab sample 180308-037NI Laboratory MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 7, 2018 09:44, sampling point TF103	Nitrate-Nitrite 1038 EPA method QC10107041C	Jan 1, 2018 – Dec 31, 2018
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 7, 2018 09:44, sampling point TF103	Nitrate 1040 EPA method QC10107041C	Jan 1, 2018 – Dec 31, 2018
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 7, 2018 09:44, sampling point TF103	Nitrite 1041 EPA method QC10107041C	Jan 1, 2018 – Dec 31, 2018
Collected Mar 7, 2018 09:12 Sampling point TF102 Treatment Plant T102 Sample type Routine Lab sample 180308-033NI Laboratory MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 7, 2018 09:12, sampling point TF102	Nitrate-Nitrite 1038 EPA method QC10107041C	Jan 1, 2018 – Dec 31, 2018
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 7, 2018 09:12, sampling point TF102	Nitrate 1040 EPA method QC10107041C	Jan 1, 2018 – Dec 31, 2018
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 7, 2018 09:12, sampling point TF102	Nitrite 1041 EPA method QC10107041C	Jan 1, 2018 – Dec 31, 2018
Collected Mar 6, 2017 11:50 Sampling point TF102 Treatment Plant T102 Sample type Routine Lab sample 170307-092NI Laboratory MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 6, 2017 11:50, sampling point TF102	Nitrate-Nitrite 1038 EPA method QC10107041C	Jan 1, 2017 – Dec 31, 2017
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 6, 2017 11:50, sampling point TF102	Nitrate 1040 EPA method QC10107041C	Jan 1, 2017 – Dec 31, 2017
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 6, 2017 11:50, sampling point TF102	Nitrite 1041 EPA method QC10107041C	Jan 1, 2017 – Dec 31, 2017
Collected Mar 6, 2017 12:10 Sampling point TF103 Sample type Routine Lab sample 170307-086NI Laboratory MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 6, 2017 12:10, sampling point TF103	Nitrate-Nitrite 1038 EPA method QC10107041C	Jan 1, 2017 – Dec 31, 2017
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 6, 2017 12:10, sampling point TF103	Nitrate 1040 EPA method QC10107041C	Jan 1, 2017 – Dec 31, 2017
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 6, 2017 12:10, sampling point TF103	Nitrite 1041 EPA method QC10107041C	Jan 1, 2017 – Dec 31, 2017
Collected Jul 7, 2016 08:01 Sampling point MRT000 Max. Res. Time Sample type Routine Lab sample 160708-003TH Laboratory MSDH Lab
17.9 ug/l , sample collected Jul 7, 2016 08:01, sampling point MRT000	Chloroform 2941 EPA method 524.2	Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 7, 2016 08:01, sampling point MRT000	Bromoform 2942 EPA method 524.2	Not recorded
3.93 ug/l , sample collected Jul 7, 2016 08:01, sampling point MRT000	Bromodichloromethane 2943 EPA method 524.2	Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 7, 2016 08:01, sampling point MRT000	Dibromochloromethane 2944 EPA method 524.2	Not recorded
21.8 ug/l , sample collected Jul 7, 2016 08:01, sampling point MRT000	TTHM 2950	Jan 1, 2014 – Dec 31, 2016

Collected
Sep 11, 2018 04:45

Sampling point
DS000 Distribution

Sample type
Routine

Lab sample
180918-003PB

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2016 – Dec 31, 2018
- Copper, Free 1022 EPA method 200.8
  
  Result
  0.3831 mg/l
- Lead 1030 EPA method 200.8
  
  Result
  0.0024 mg/l
Collected
Sep 11, 2018 04:30

Sampling point
DS000 Distribution

Sample type
Routine

Lab sample
180918-002PB

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2016 – Dec 31, 2018
- Copper, Free 1022 EPA method 200.8
  
  Result
  0.13 mg/l
- Lead 1030 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
Collected
Sep 10, 2018 11:15

Sampling point
TF103

Sample type
Routine

Lab sample
180911-008VO

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2013 – Dec 31, 2018
- 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
Jun 12, 2018 10:00

Sampling point
TF103

Sample type
Routine

Lab sample
3961311

Laboratory
Eurofins Eaton Analytical South Bend in

Monitoring period
Jan 1, 2013 – Dec 31, 2021
- Gross Alpha, Incl. Radon & U 4002 EPA method 7110B
  
  Result
  Not detected below 2.6 pci/l Minimum Reporting Level
Collected
Jun 12, 2018 10:00

Sampling point
TF103

Sample type
Routine

Lab sample
3961310

Laboratory
Eurofins Eaton Analytical South Bend in
- Combined Radium (-226 & -228) 4010 EPA method 7500-RA
  
  Result
  2.93 pci/l
  
  Monitoring period
  Not recorded
- Radium-226 4020 EPA method 7500-RAB
  
  Result
  0.43 pci/l
  
  Monitoring period
  Jan 1, 2013 – Dec 31, 2018
- Radium-228 4030 EPA method 7500-RAD
  
  Result
  2.5 pci/l
  
  Monitoring period
  Jan 1, 2013 – Dec 31, 2018
Collected
Mar 7, 2018 09:44

Sampling point
TF103

Sample type
Routine

Lab sample
180308-037NI

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2018 – Dec 31, 2018
- 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 7, 2018 09:12

Sampling point
TF102 Treatment Plant T102

Sample type
Routine

Lab sample
180308-033NI

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2018 – Dec 31, 2018
- 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 6, 2017 11:50

Sampling point
TF102 Treatment Plant T102

Sample type
Routine

Lab sample
170307-092NI

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2017 – Dec 31, 2017
- 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 6, 2017 12:10

Sampling point
TF103

Sample type
Routine

Lab sample
170307-086NI

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2017 – Dec 31, 2017
- 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
Jul 7, 2016 08:01

Sampling point
MRT000 Max. Res. Time

Sample type
Routine

Lab sample
160708-003TH

Laboratory
MSDH Lab
- Chloroform 2941 EPA method 524.2
  
  Result
  17.9 ug/l
  
  Monitoring period
  Not recorded
- Bromoform 2942 EPA method 524.2
  
  Result
  Not detected below 1 ug/l Minimum Reporting Level
  
  Monitoring period
  Not recorded
- Bromodichloromethane 2943 EPA method 524.2
  
  Result
  3.93 ug/l
  
  Monitoring period
  Not recorded
- Dibromochloromethane 2944 EPA method 524.2
  
  Result
  Not detected below 1 ug/l Minimum Reporting Level
  
  Monitoring period
  Not recorded
- TTHM 2950
  
  Result
  21.8 ug/l
  
  Monitoring period
  Jan 1, 2014 – Dec 31, 2016

Routine (10).