Public Water System: San Luis Obispo Water Department

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: CA4010009
Type: Community water system
EPA Region: 09
Primary Service Area: Residential Area
Primary Source: Surface water
Population Served: 46,117
Contact Information
MATTINGLY, CARRIE
MATTINGLY, CARRIE
879 MORRO STREET
SAN LUIS OBISPO, CA 93401

This public water system services 2 zip codes 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   (1)
chlorate 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
2015 2015-04-06 20 210 240
2015 2015-04-06 20 210 140
2015 2015-01-14 20 210 88
2015 2015-01-14 20 210 100
2015 2015-01-14 20 210 150
2015 2015-01-14 20 210 120
2014 2014-10-07 20 210 330
2014 2014-10-07 20 210 310
2014 2014-07-15 20 210 120
2014 2014-07-15 20 210 230
2014 2014-07-15 20 210 120
2014 2014-07-15 20 210 220

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
PFHpA 0.01 0 < 0.01 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-04-06 0.01 0 < 0.01
2015 2015-01-14 0.01 0 < 0.01
2015 2015-01-14 0.01 0 < 0.01
2014 2014-10-07 0.01 0 < 0.01
2014 2014-07-15 0.01 0 < 0.01
2014 2014-07-15 0.01 0 < 0.01
PFBS 0.09 0 < 0.09 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-04-06 0.09 0 < 0.09
2015 2015-01-14 0.09 0 < 0.09
2015 2015-01-14 0.09 0 < 0.09
2014 2014-10-07 0.09 0 < 0.09
2014 2014-07-15 0.09 0 < 0.09
2014 2014-07-15 0.09 0 < 0.09
testosterone 0.0001 0 < 0.0001 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-04-06 0.0001 0 < 0.0001
2015 2015-01-14 0.0001 0 < 0.0001
2015 2015-01-14 0.0001 0 < 0.0001
2014 2014-10-07 0.0001 0 < 0.0001
2014 2014-07-15 0.0001 0 < 0.0001
2014 2014-07-15 0.0001 0 < 0.0001
chromium 0.2 100 2.6667 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-04-06 0.2 100 < 0.2
2015 2015-04-06 0.2 100 < 0.2
2015 2015-01-14 0.2 100 11
2015 2015-01-14 0.2 100 < 0.2
2015 2015-01-14 0.2 100 < 0.2
2015 2015-01-14 0.2 100 < 0.2
2014 2014-10-07 0.2 100 < 0.2
2014 2014-10-07 0.2 100 < 0.2
2014 2014-07-15 0.2 100 11
2014 2014-07-15 0.2 100 < 0.2
2014 2014-07-15 0.2 100 10
2014 2014-07-15 0.2 100 < 0.2
strontium 0.3 1500 380 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-04-06 0.3 1500 450
2015 2015-04-06 0.3 1500 420
2015 2015-01-14 0.3 1500 290
2015 2015-01-14 0.3 1500 430
2015 2015-01-14 0.3 1500 450
2015 2015-01-14 0.3 1500 430
2014 2014-10-07 0.3 1500 410
2014 2014-10-07 0.3 1500 420
2014 2014-07-15 0.3 1500 260
2014 2014-07-15 0.3 1500 340
2014 2014-07-15 0.3 1500 300
2014 2014-07-15 0.3 1500 360
PFHxS 0.03 0 < 0.03 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-04-06 0.03 0 < 0.03
2015 2015-01-14 0.03 0 < 0.03
2015 2015-01-14 0.03 0 < 0.03
2014 2014-10-07 0.03 0 < 0.03
2014 2014-07-15 0.03 0 < 0.03
2014 2014-07-15 0.03 0 < 0.03
1,3-butadiene 0.1 0.0103 < 0.1 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-04-06 0.1 0.0103 < 0.1
2015 2015-01-14 0.1 0.0103 < 0.1
2015 2015-01-14 0.1 0.0103 < 0.1
2014 2014-10-07 0.1 0.0103 < 0.1
2014 2014-07-15 0.1 0.0103 < 0.1
2014 2014-07-15 0.1 0.0103 < 0.1
HCFC-22 0.08 0 < 0.08 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-04-06 0.08 0 < 0.08
2015 2015-01-14 0.08 0 < 0.08
2015 2015-01-14 0.08 0 < 0.08
2014 2014-10-07 0.08 0 < 0.08
2014 2014-07-15 0.08 0 < 0.08
2014 2014-07-15 0.08 0 < 0.08
estrone 0.002 0.35 < 0.002 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-04-06 0.002 0.35 < 0.002
2015 2015-01-14 0.002 0.35 < 0.002
2015 2015-01-14 0.002 0.35 < 0.002
2014 2014-10-07 0.002 0.35 < 0.002
2014 2014-07-15 0.002 0.35 < 0.002
2014 2014-07-15 0.002 0.35 < 0.002
1,4-dioxane 0.07 0.35 < 0.07 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-04-06 0.07 0.35 < 0.07
2015 2015-01-14 0.07 0.35 < 0.07
2015 2015-01-14 0.07 0.35 < 0.07
2014 2014-10-07 0.07 0.35 < 0.07
2014 2014-07-15 0.07 0.35 < 0.07
2014 2014-07-15 0.07 0.35 < 0.07
PFNA 0.02 0 < 0.02 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-04-06 0.02 0 < 0.02
2015 2015-01-14 0.02 0 < 0.02
2015 2015-01-14 0.02 0 < 0.02
2014 2014-10-07 0.02 0 < 0.02
2014 2014-07-15 0.02 0 < 0.02
2014 2014-07-15 0.02 0 < 0.02
PFOS 0.04 0.07 < 0.04 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-04-06 0.04 0.07 < 0.04
2015 2015-01-14 0.04 0.07 < 0.04
2015 2015-01-14 0.04 0.07 < 0.04
2014 2014-10-07 0.04 0.07 < 0.04
2014 2014-07-15 0.04 0.07 < 0.04
2014 2014-07-15 0.04 0.07 < 0.04
PFOA 0.02 0.07 < 0.02 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-04-06 0.02 0.07 < 0.02
2015 2015-01-14 0.02 0.07 < 0.02
2015 2015-01-14 0.02 0.07 < 0.02
2014 2014-10-07 0.02 0.07 < 0.02
2014 2014-07-15 0.02 0.07 < 0.02
2014 2014-07-15 0.02 0.07 < 0.02
1,1-dichloroethane 0.03 6.14 < 0.03 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-04-06 0.03 6.14 < 0.03
2015 2015-01-14 0.03 6.14 < 0.03
2015 2015-01-14 0.03 6.14 < 0.03
2014 2014-10-07 0.03 6.14 < 0.03
2014 2014-07-15 0.03 6.14 < 0.03
2014 2014-07-15 0.03 6.14 < 0.03
17-beta-estradiol 0.0004 0.0009 < 0.0004 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-04-06 0.0004 0.0009 < 0.0004
2015 2015-01-14 0.0004 0.0009 < 0.0004
2015 2015-01-14 0.0004 0.0009 < 0.0004
2014 2014-10-07 0.0004 0.0009 < 0.0004
2014 2014-07-15 0.0004 0.0009 < 0.0004
2014 2014-07-15 0.0004 0.0009 < 0.0004
17-alpha-ethynylestradiol 0.0009 0.035 < 0.0009 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-04-06 0.0009 0.035 < 0.0009
2015 2015-01-14 0.0009 0.035 < 0.0009
2015 2015-01-14 0.0009 0.035 < 0.0009
2014 2014-10-07 0.0009 0.035 < 0.0009
2014 2014-07-15 0.0009 0.035 < 0.0009
2014 2014-07-15 0.0009 0.035 < 0.0009
equilin 0.004 0.35 < 0.004 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-04-06 0.004 0.35 < 0.004
2015 2015-01-14 0.004 0.35 < 0.004
2015 2015-01-14 0.004 0.35 < 0.004
2014 2014-10-07 0.004 0.35 < 0.004
2014 2014-07-15 0.004 0.35 < 0.004
2014 2014-07-15 0.004 0.35 < 0.004
1,2,3-trichloropropane 0.03 0.0004 < 0.03 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-04-06 0.03 0.0004 < 0.03
2015 2015-01-14 0.03 0.0004 < 0.03
2015 2015-01-14 0.03 0.0004 < 0.03
2014 2014-10-07 0.03 0.0004 < 0.03
2014 2014-07-15 0.03 0.0004 < 0.03
2014 2014-07-15 0.03 0.0004 < 0.03
chromium-6 0.03 0 3.1383 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-04-06 0.03 0 0.059
2015 2015-04-06 0.03 0 0.052
2015 2015-01-14 0.03 0 12
2015 2015-01-14 0.03 0 0.13
2015 2015-01-14 0.03 0 0.068
2015 2015-01-14 0.03 0 0.054
2014 2014-10-07 0.03 0 0.11
2014 2014-10-07 0.03 0 0.047
2014 2014-07-15 0.03 0 13
2014 2014-07-15 0.03 0 0.08
2014 2014-07-15 0.03 0 12
2014 2014-07-15 0.03 0 0.06
Halon 1011 0.06 90 < 0.06 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-04-06 0.06 90 < 0.06
2015 2015-01-14 0.06 90 < 0.06
2015 2015-01-14 0.06 90 < 0.06
2014 2014-10-07 0.06 90 < 0.06
2014 2014-07-15 0.06 90 < 0.06
2014 2014-07-15 0.06 90 < 0.06
4-androstene-3,17-dione 0.0003 0 < 0.0003 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-04-06 0.0003 0 < 0.0003
2015 2015-01-14 0.0003 0 < 0.0003
2015 2015-01-14 0.0003 0 < 0.0003
2014 2014-10-07 0.0003 0 < 0.0003
2014 2014-07-15 0.0003 0 < 0.0003
2014 2014-07-15 0.0003 0 < 0.0003
cobalt 1 70 < 1 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-04-06 1 70 < 1
2015 2015-04-06 1 70 < 1
2015 2015-01-14 1 70 < 1
2015 2015-01-14 1 70 < 1
2015 2015-01-14 1 70 < 1
2015 2015-01-14 1 70 < 1
2014 2014-10-07 1 70 < 1
2014 2014-10-07 1 70 < 1
2014 2014-07-15 1 70 < 1
2014 2014-07-15 1 70 < 1
2014 2014-07-15 1 70 < 1
2014 2014-07-15 1 70 < 1
vanadium 0.2 21 3.5417 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-04-06 0.2 21 3.4
2015 2015-04-06 0.2 21 3.2
2015 2015-01-14 0.2 21 5.4
2015 2015-01-14 0.2 21 2.7
2015 2015-01-14 0.2 21 2.8
2015 2015-01-14 0.2 21 2.5
2014 2014-10-07 0.2 21 3.3
2014 2014-10-07 0.2 21 3.3
2014 2014-07-15 0.2 21 3
2014 2014-07-15 0.2 21 2.9
2014 2014-07-15 0.2 21 4.8
2014 2014-07-15 0.2 21 5.2
estriol 0.0008 0.35 < 0.0008 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-04-06 0.0008 0.35 < 0.0008
2015 2015-01-14 0.0008 0.35 < 0.0008
2015 2015-01-14 0.0008 0.35 < 0.0008
2014 2014-10-07 0.0008 0.35 < 0.0008
2014 2014-07-15 0.0008 0.35 < 0.0008
2014 2014-07-15 0.0008 0.35 < 0.0008
bromomethane 0.2 140 < 0.2 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-04-06 0.2 140 < 0.2
2015 2015-01-14 0.2 140 < 0.2
2015 2015-01-14 0.2 140 < 0.2
2014 2014-10-07 0.2 140 < 0.2
2014 2014-07-15 0.2 140 < 0.2
2014 2014-07-15 0.2 140 < 0.2
molybdenum 1 40 2.775 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-04-06 1 40 4.5
2015 2015-04-06 1 40 4.2
2015 2015-01-14 1 40 < 1
2015 2015-01-14 1 40 3.8
2015 2015-01-14 1 40 3.9
2015 2015-01-14 1 40 3.6
2014 2014-10-07 1 40 3.5
2014 2014-10-07 1 40 3.5
2014 2014-07-15 1 40 3.1
2014 2014-07-15 1 40 < 1
2014 2014-07-15 1 40 < 1
2014 2014-07-15 1 40 3.2
chloromethane 0.2 2.69 < 0.2 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-04-06 0.2 2.69 < 0.2
2015 2015-01-14 0.2 2.69 < 0.2
2015 2015-01-14 0.2 2.69 < 0.2
2014 2014-10-07 0.2 2.69 < 0.2
2014 2014-07-15 0.2 2.69 < 0.2
2014 2014-07-15 0.2 2.69 < 0.2

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
CA55041 lead 2014-01-01 2016-12-31 0.0011mg/L
CA37541 lead 2011-01-01 2013-12-31 0.009mg/L
401000911241L lead 2011-01-01 2011-12-31 0.0018mg/L
401000910242L lead 2010-01-01 2010-12-31 0.0018mg/L

Violations


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

Compliance Dates Rule Violation Type Contaminant Name Status
2015-04-01 - 2015-06-30 Stage 2 Disinfectants and Disinfection Byproducts Rule Maximum Contaminant Level Violation, Average TTHM 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.