Public Water System: St Charles Co Pwsd 2

MyTapWater.org's tap water quality report is the compilation of data collected from federal, state, and local government agencies, most prominently the EPA. We strive to populate the report with the latest data concerning water contaminants, lead and copper levels, and water quality violations. We only collect drinking water data from public water systems.

PWS Service Information
PWS ID: MO6024530
Type: Community water system
EPA Region: 07
Primary Service Area: Residential Area
Primary Source: Surface water purchased
Population Served: 100,587
Contact Information
PIEPER, BRIAN
PIEPER, BRIAN
100 WATER DR
PO BOX 967
O FALLON, MO 63366-0000

This public water system services 1 zip code in 1 municipality in 1 county.

Summary Results


A summary view of the the times a water contaminant was tested and found to exceed the level set by the EPA (the MCL).

Maximum Contaminant Levels Exceeded (by year):

2013   (0) 2014   (1) 2015   (0)
chlorate

Contaminant Detailed Results


This a view of violations of maximum contaminant levels. In the expanded view you can see each know test date for a given contaminant, the result of the test, the minimum level that can be recognized in a test (MRL), and upper limit that is considered healthy (HRL).

chlorate
Is this in your home's pipes?

Year Test Date MRL HRL Test Result
2014 2014-08-28 20 210 408
2014 2014-07-22 20 210 200
2014 2014-07-22 20 210 421
2014 2014-07-21 20 210 406
2014 2014-07-01 20 210 268
2014 2014-03-31 20 210 368
2014 2014-03-31 20 210 415
2013 2013-10-23 20 210 < 20
2013 2013-07-17 20 210 < 20
2013 2013-04-22 20 210 < 20
2013 2013-03-26 20 210 < 20
2013 2013-02-04 20 210 < 20

Other Water Contaminants Tested


The following contaminants were tested and within national EPA guidelines.

The last mile of pipe makes a big difference, learn more about testing your water.

Contaminant MRL HRL Avg Result
vanadium 0.2 21 1.3367 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-23 0.2 21 1.26
2013 2013-10-23 0.2 21 4.01
2013 2013-10-23 0.2 21 0.46
2013 2013-07-17 0.2 21 3.66
2013 2013-07-17 0.2 21 2.11
2013 2013-07-17 0.2 21 0.25
2013 2013-04-22 0.2 21 0.97
2013 2013-04-22 0.2 21 0.57
2013 2013-04-22 0.2 21 0.47
2013 2013-03-26 0.2 21 1.09
2013 2013-03-26 0.2 21 0.64
2013 2013-03-26 0.2 21 0.55
strontium 0.3 1500 207 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-23 0.3 1500 215
2013 2013-10-23 0.3 1500 246
2013 2013-10-23 0.3 1500 227
2013 2013-07-17 0.3 1500 178
2013 2013-07-17 0.3 1500 211
2013 2013-07-17 0.3 1500 288
2013 2013-04-22 0.3 1500 131
2013 2013-04-22 0.3 1500 217
2013 2013-04-22 0.3 1500 213
2013 2013-03-26 0.3 1500 118
2013 2013-03-26 0.3 1500 202
2013 2013-03-26 0.3 1500 238
chloromethane 0.2 2.69 < 0.2 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-28 0.2 2.69 < 0.2
2013 2013-10-28 0.2 2.69 < 0.2
2013 2013-08-26 0.2 2.69 < 0.2
2013 2013-07-17 0.2 2.69 < 0.2
2013 2013-05-13 0.2 2.69 < 0.2
2013 2013-05-13 0.2 2.69 < 0.2
2013 2013-01-23 0.2 2.69 < 0.2
2013 2013-01-23 0.2 2.69 < 0.2
cobalt 1 70 < 1 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-23 1 70 < 1
2013 2013-10-23 1 70 < 1
2013 2013-10-23 1 70 < 1
2013 2013-07-17 1 70 < 1
2013 2013-07-17 1 70 < 1
2013 2013-07-17 1 70 < 1
2013 2013-04-22 1 70 < 1
2013 2013-04-22 1 70 < 1
2013 2013-04-22 1 70 < 1
2013 2013-03-26 1 70 < 1
2013 2013-03-26 1 70 < 1
2013 2013-03-26 1 70 < 1
PFOS 0.04 0.07 < 0.04 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-12-10 0.04 0.07 < 0.04
2013 2013-12-10 0.04 0.07 < 0.04
2013 2013-07-17 0.04 0.07 < 0.04
2013 2013-07-17 0.04 0.07 < 0.04
2013 2013-05-13 0.04 0.07 < 0.04
2013 2013-05-13 0.04 0.07 < 0.04
2013 2013-01-23 0.04 0.07 < 0.04
2013 2013-01-23 0.04 0.07 < 0.04
molybdenum 1 40 2.4992 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-23 1 40 4.51
2013 2013-10-23 1 40 2.9
2013 2013-10-23 1 40 2.75
2013 2013-07-17 1 40 3.35
2013 2013-07-17 1 40 2.49
2013 2013-07-17 1 40 2.48
2013 2013-04-22 1 40 1.28
2013 2013-04-22 1 40 2.14
2013 2013-04-22 1 40 2.34
2013 2013-03-26 1 40 1.1
2013 2013-03-26 1 40 2.06
2013 2013-03-26 1 40 2.59
bromomethane 0.2 140 < 0.2 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-28 0.2 140 < 0.2
2013 2013-10-28 0.2 140 < 0.2
2013 2013-08-26 0.2 140 < 0.2
2013 2013-07-17 0.2 140 < 0.2
2013 2013-05-13 0.2 140 < 0.2
2013 2013-05-13 0.2 140 < 0.2
2013 2013-01-23 0.2 140 < 0.2
2013 2013-01-23 0.2 140 < 0.2
chromium 0.2 100 1.5867 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-23 0.2 100 1.82
2013 2013-10-23 0.2 100 1.41
2013 2013-10-23 0.2 100 2
2013 2013-07-17 0.2 100 1.53
2013 2013-07-17 0.2 100 2.14
2013 2013-07-17 0.2 100 1.34
2013 2013-04-22 0.2 100 1.03
2013 2013-04-22 0.2 100 1.8
2013 2013-04-22 0.2 100 1.87
2013 2013-03-26 0.2 100 0.9
2013 2013-03-26 0.2 100 1.56
2013 2013-03-26 0.2 100 1.64
PFHxS 0.03 0 < 0.03 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-12-10 0.03 0 < 0.03
2013 2013-12-10 0.03 0 < 0.03
2013 2013-07-17 0.03 0 < 0.03
2013 2013-07-17 0.03 0 < 0.03
2013 2013-05-13 0.03 0 < 0.03
2013 2013-05-13 0.03 0 < 0.03
2013 2013-01-23 0.03 0 < 0.03
2013 2013-01-23 0.03 0 < 0.03
estriol 0.0008 0.35 < 0.0008 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-28 0.0008 0.35 < 0.0008
2013 2013-10-28 0.0008 0.35 < 0.0008
2013 2013-07-17 0.0008 0.35 < 0.0008
2013 2013-07-17 0.0008 0.35 < 0.0008
2013 2013-05-13 0.0008 0.35 < 0.0008
2013 2013-05-13 0.0008 0.35 < 0.0008
2013 2013-01-23 0.0008 0.35 < 0.0008
2013 2013-01-23 0.0008 0.35 < 0.0008
4-androstene-3,17-dione 0.0003 0 < 0.0003 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-28 0.0003 0 < 0.0003
2013 2013-10-28 0.0003 0 < 0.0003
2013 2013-07-17 0.0003 0 < 0.0003
2013 2013-07-17 0.0003 0 < 0.0003
2013 2013-05-13 0.0003 0 < 0.0003
2013 2013-05-13 0.0003 0 < 0.0003
2013 2013-01-23 0.0003 0 < 0.0003
2013 2013-01-23 0.0003 0 < 0.0003
HCFC-22 0.08 0 0.0238 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-28 0.08 0 < 0.08
2013 2013-10-28 0.08 0 < 0.08
2013 2013-08-26 0.08 0 < 0.08
2013 2013-07-17 0.08 0 < 0.08
2013 2013-05-13 0.08 0 < 0.08
2013 2013-05-13 0.08 0 < 0.08
2013 2013-01-23 0.08 0 < 0.08
2013 2013-01-23 0.08 0 0.19
PFBS 0.09 0 < 0.09 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-12-10 0.09 0 < 0.09
2013 2013-12-10 0.09 0 < 0.09
2013 2013-07-17 0.09 0 < 0.09
2013 2013-07-17 0.09 0 < 0.09
2013 2013-05-13 0.09 0 < 0.09
2013 2013-05-13 0.09 0 < 0.09
2013 2013-01-23 0.09 0 < 0.09
2013 2013-01-23 0.09 0 < 0.09
equilin 0.004 0.35 < 0.004 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-28 0.004 0.35 < 0.004
2013 2013-10-28 0.004 0.35 < 0.004
2013 2013-07-17 0.004 0.35 < 0.004
2013 2013-07-17 0.004 0.35 < 0.004
2013 2013-05-13 0.004 0.35 < 0.004
2013 2013-05-13 0.004 0.35 < 0.004
2013 2013-01-23 0.004 0.35 < 0.004
2013 2013-01-23 0.004 0.35 < 0.004
estrone 0.002 0.35 < 0.002 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-28 0.002 0.35 < 0.002
2013 2013-10-28 0.002 0.35 < 0.002
2013 2013-07-17 0.002 0.35 < 0.002
2013 2013-07-17 0.002 0.35 < 0.002
2013 2013-05-13 0.002 0.35 < 0.002
2013 2013-05-13 0.002 0.35 < 0.002
2013 2013-01-23 0.002 0.35 < 0.002
2013 2013-01-23 0.002 0.35 < 0.002
testosterone 0.0001 0 < 0.0001 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-28 0.0001 0 < 0.0001
2013 2013-10-28 0.0001 0 < 0.0001
2013 2013-07-17 0.0001 0 < 0.0001
2013 2013-07-17 0.0001 0 < 0.0001
2013 2013-05-13 0.0001 0 < 0.0001
2013 2013-05-13 0.0001 0 < 0.0001
2013 2013-01-23 0.0001 0 < 0.0001
2013 2013-01-23 0.0001 0 < 0.0001
17-alpha-ethynylestradiol 0.0009 0.035 < 0.0009 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-28 0.0009 0.035 < 0.0009
2013 2013-10-28 0.0009 0.035 < 0.0009
2013 2013-07-17 0.0009 0.035 < 0.0009
2013 2013-07-17 0.0009 0.035 < 0.0009
2013 2013-05-13 0.0009 0.035 < 0.0009
2013 2013-05-13 0.0009 0.035 < 0.0009
2013 2013-01-23 0.0009 0.035 < 0.0009
2013 2013-01-23 0.0009 0.035 < 0.0009
1,3-butadiene 0.1 0.0103 < 0.1 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-28 0.1 0.0103 < 0.1
2013 2013-10-28 0.1 0.0103 < 0.1
2013 2013-08-26 0.1 0.0103 < 0.1
2013 2013-07-17 0.1 0.0103 < 0.1
2013 2013-05-13 0.1 0.0103 < 0.1
2013 2013-05-13 0.1 0.0103 < 0.1
2013 2013-01-23 0.1 0.0103 < 0.1
2013 2013-01-23 0.1 0.0103 < 0.1
Halon 1011 0.06 90 < 0.06 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-28 0.06 90 < 0.06
2013 2013-10-28 0.06 90 < 0.06
2013 2013-08-26 0.06 90 < 0.06
2013 2013-07-17 0.06 90 < 0.06
2013 2013-05-13 0.06 90 < 0.06
2013 2013-05-13 0.06 90 < 0.06
2013 2013-01-23 0.06 90 < 0.06
2013 2013-01-23 0.06 90 < 0.06
1,2,3-trichloropropane 0.03 0.0004 < 0.03 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-28 0.03 0.0004 < 0.03
2013 2013-10-28 0.03 0.0004 < 0.03
2013 2013-08-26 0.03 0.0004 < 0.03
2013 2013-07-17 0.03 0.0004 < 0.03
2013 2013-05-13 0.03 0.0004 < 0.03
2013 2013-05-13 0.03 0.0004 < 0.03
2013 2013-01-23 0.03 0.0004 < 0.03
2013 2013-01-23 0.03 0.0004 < 0.03
chromium-6 0.03 0 1.355 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-28 0.03 0 0.13
2013 2013-10-28 0.03 0 1.2
2013 2013-10-28 0.03 0 1.5
2013 2013-07-17 0.03 0 1.3
2013 2013-07-17 0.03 0 1.3
2013 2013-07-17 0.03 0 1.2
2013 2013-05-13 0.03 0 0.93
2013 2013-05-13 0.03 0 1.3
2013 2013-05-13 0.03 0 1.9
2013 2013-01-23 0.03 0 2
2013 2013-01-23 0.03 0 1.1
2013 2013-01-23 0.03 0 2.4
1,4-dioxane 0.07 0.35 < 0.07 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-28 0.07 0.35 < 0.07
2013 2013-10-28 0.07 0.35 < 0.07
2013 2013-07-17 0.07 0.35 < 0.07
2013 2013-07-17 0.07 0.35 < 0.07
2013 2013-05-13 0.07 0.35 < 0.07
2013 2013-05-13 0.07 0.35 < 0.07
2013 2013-03-26 0.07 0.35 < 0.07
2013 2013-03-26 0.07 0.35 < 0.07
PFOA 0.02 0.07 < 0.02 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-12-10 0.02 0.07 < 0.02
2013 2013-12-10 0.02 0.07 < 0.02
2013 2013-07-17 0.02 0.07 < 0.02
2013 2013-07-17 0.02 0.07 < 0.02
2013 2013-05-13 0.02 0.07 < 0.02
2013 2013-05-13 0.02 0.07 < 0.02
2013 2013-01-23 0.02 0.07 < 0.02
2013 2013-01-23 0.02 0.07 < 0.02
17-beta-estradiol 0.0004 0.0009 < 0.0004 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-28 0.0004 0.0009 < 0.0004
2013 2013-10-28 0.0004 0.0009 < 0.0004
2013 2013-07-17 0.0004 0.0009 < 0.0004
2013 2013-07-17 0.0004 0.0009 < 0.0004
2013 2013-05-13 0.0004 0.0009 < 0.0004
2013 2013-05-13 0.0004 0.0009 < 0.0004
2013 2013-01-23 0.0004 0.0009 < 0.0004
2013 2013-01-23 0.0004 0.0009 < 0.0004
1,1-dichloroethane 0.03 6.14 < 0.03 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-10-28 0.03 6.14 < 0.03
2013 2013-10-28 0.03 6.14 < 0.03
2013 2013-08-26 0.03 6.14 < 0.03
2013 2013-07-17 0.03 6.14 < 0.03
2013 2013-05-13 0.03 6.14 < 0.03
2013 2013-05-13 0.03 6.14 < 0.03
2013 2013-01-23 0.03 6.14 < 0.03
2013 2013-01-23 0.03 6.14 < 0.03
PFHpA 0.01 0 < 0.01 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-12-10 0.01 0 < 0.01
2013 2013-12-10 0.01 0 < 0.01
2013 2013-07-17 0.01 0 < 0.01
2013 2013-07-17 0.01 0 < 0.01
2013 2013-05-13 0.01 0 < 0.01
2013 2013-05-13 0.01 0 < 0.01
2013 2013-01-23 0.01 0 < 0.01
2013 2013-01-23 0.01 0 < 0.01
PFNA 0.02 0 < 0.02 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2013 2013-12-10 0.02 0 < 0.02
2013 2013-12-10 0.02 0 < 0.02
2013 2013-07-17 0.02 0 < 0.02
2013 2013-07-17 0.02 0 < 0.02
2013 2013-05-13 0.02 0 < 0.02
2013 2013-05-13 0.02 0 < 0.02
2013 2013-01-23 0.02 0 < 0.02
2013 2013-01-23 0.02 0 < 0.02

Lead and Copper Data


Lead and copper are recorded separately from other contaminants because of the Lead and Copper Rule. As with all other results, these are the findings at the water supply. Lead and copper can be — and often are — added to drinking water in between the water facility and a tap.

Sample ID Contaminant Sampling Start Date Sampling End Date Result
MO40418 lead 2014-01-01 2016-12-31 0.00103mg/L
MO35711 lead 2011-01-01 2013-12-31 0.0014mg/L
MO31077 lead 2008-01-01 2010-12-31 0.00284mg/L

Violations


Known violations of the Safe Drinking Water Act as recorded by the EPA.

Compliance Dates Rule Violation Type Contaminant Name Status
2007-09-01 - 2007-09-30 Total Coliform Rule Maximum Contaminant Level Violation, Monthly (TCR) Coliform (TCR) Returned to Compliance
1996-12-01 - 1996-12-31 Total Coliform Rule Maximum Contaminant Level Violation, Monthly (TCR) Coliform (TCR) Returned to Compliance

What My Water Data Means


Water data isn't always easy to interpret, but by following the links on this page you should be able to have most of your questions answered. By clicking the name of a water contaminant or secondary substance you can learn about that specific substance. Ultimately this page should give you some insight towards learning if your water is safe, what water filter you should buy (if any), and how well your local water compares against other sources.

Sources


The origin of MyTapWater.org's water data is explained on our Data Sources page.

Why Is My Water Data Not More Recent?


The recency of the data for your ZIP code depends on the last your water source was tested, by a federal, state, or local agency. More information about the timing can be determined by learning about the dataset in question and seeing how often the EPA (other another governing body) mandated testing.