Public Water System: Arroyo Grande, 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: CA4010001
Type: Community water system
EPA Region: 09
Primary Service Area: Residential Area
Primary Source: Surface water purchased
Population Served: 17,636
Contact Information
TAYLOR, SHANE
TAYLOR, SHANE
300 EAST BRANCH STREET
ARROYO GRANDE, CA 93420

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   (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 2015-09-22 20 210 800
2015 2015-09-22 20 210 520
2015 2015-06-17 20 210 54
2015 2015-06-16 20 210 360
2015 2015-06-16 20 210 230
2015 2015-06-16 20 210 340
2015 2015-03-17 20 210 320
2015 2015-03-17 20 210 550
2014 2014-12-16 20 210 640
2014 2014-12-16 20 210 520
2014 2014-12-16 20 210 590
2014 2014-12-16 20 210 800

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
PFOA 0.02 0.07 < 0.02 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-09-22 0.02 0.07 < 0.02
2015 2015-06-17 0.02 0.07 < 0.02
2015 2015-06-16 0.02 0.07 < 0.02
2015 2015-06-16 0.02 0.07 < 0.02
2015 2015-03-17 0.02 0.07 < 0.02
2014 2014-12-16 0.02 0.07 < 0.02
2014 2014-12-16 0.02 0.07 < 0.02
2014 2014-12-16 0.02 0.07 < 0.02
chromium 0.2 100 0.0408 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-09-22 0.2 100 < 0.2
2015 2015-09-22 0.2 100 0.25
2015 2015-06-17 0.2 100 < 0.2
2015 2015-06-16 0.2 100 < 0.2
2015 2015-06-16 0.2 100 < 0.2
2015 2015-06-16 0.2 100 0.24
2015 2015-03-17 0.2 100 < 0.2
2015 2015-03-17 0.2 100 < 0.2
2014 2014-12-16 0.2 100 < 0.2
2014 2014-12-16 0.2 100 < 0.2
2014 2014-12-16 0.2 100 < 0.2
2014 2014-12-16 0.2 100 < 0.2
strontium 0.3 1500 287 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-09-22 0.3 1500 360
2015 2015-09-22 0.3 1500 340
2015 2015-06-17 0.3 1500 44
2015 2015-06-16 0.3 1500 190
2015 2015-06-16 0.3 1500 330
2015 2015-06-16 0.3 1500 310
2015 2015-03-17 0.3 1500 410
2015 2015-03-17 0.3 1500 360
2014 2014-12-16 0.3 1500 40
2014 2014-12-16 0.3 1500 230
2014 2014-12-16 0.3 1500 450
2014 2014-12-16 0.3 1500 380
chromium-6 0.03 0 0.056 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-09-22 0.03 0 0.048
2015 2015-09-22 0.03 0 0.12
2015 2015-06-17 0.03 0 < 0.03
2015 2015-06-16 0.03 0 0.054
2015 2015-06-16 0.03 0 0.051
2015 2015-06-16 0.03 0 0.14
2015 2015-03-17 0.03 0 < 0.03
2015 2015-03-17 0.03 0 0.11
2014 2014-12-16 0.03 0 < 0.03
2014 2014-12-16 0.03 0 0.083
2014 2014-12-16 0.03 0 < 0.03
2014 2014-12-16 0.03 0 0.066
cobalt 1 70 < 1 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-09-22 1 70 < 1
2015 2015-09-22 1 70 < 1
2015 2015-06-17 1 70 < 1
2015 2015-06-16 1 70 < 1
2015 2015-06-16 1 70 < 1
2015 2015-06-16 1 70 < 1
2015 2015-03-17 1 70 < 1
2015 2015-03-17 1 70 < 1
2014 2014-12-16 1 70 < 1
2014 2014-12-16 1 70 < 1
2014 2014-12-16 1 70 < 1
2014 2014-12-16 1 70 < 1
molybdenum 1 40 9.1333 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-09-22 1 40 11
2015 2015-09-22 1 40 13
2015 2015-06-17 1 40 < 1
2015 2015-06-16 1 40 3
2015 2015-06-16 1 40 10
2015 2015-06-16 1 40 11
2015 2015-03-17 1 40 13
2015 2015-03-17 1 40 13
2014 2014-12-16 1 40 < 1
2014 2014-12-16 1 40 18
2014 2014-12-16 1 40 1.6
2014 2014-12-16 1 40 16
vanadium 0.2 21 2.3558 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-09-22 0.2 21 3.8
2015 2015-09-22 0.2 21 3.5
2015 2015-06-17 0.2 21 < 0.2
2015 2015-06-16 0.2 21 < 0.2
2015 2015-06-16 0.2 21 3.4
2015 2015-06-16 0.2 21 3.3
2015 2015-03-17 0.2 21 3
2015 2015-03-17 0.2 21 3.1
2014 2014-12-16 0.2 21 < 0.2
2014 2014-12-16 0.2 21 4.1
2014 2014-12-16 0.2 21 0.27
2014 2014-12-16 0.2 21 3.8
1,4-dioxane 0.07 0.35 < 0.07 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-09-22 0.07 0.35 < 0.07
2015 2015-06-17 0.07 0.35 < 0.07
2015 2015-06-16 0.07 0.35 < 0.07
2015 2015-06-16 0.07 0.35 < 0.07
2015 2015-03-17 0.07 0.35 < 0.07
2014 2014-12-16 0.07 0.35 < 0.07
2014 2014-12-16 0.07 0.35 < 0.07
2014 2014-12-16 0.07 0.35 < 0.07
chloromethane 0.2 2.69 < 0.2 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-09-22 0.2 2.69 < 0.2
2015 2015-06-17 0.2 2.69 < 0.2
2015 2015-06-16 0.2 2.69 < 0.2
2015 2015-06-16 0.2 2.69 < 0.2
2015 2015-03-17 0.2 2.69 < 0.2
2014 2014-12-16 0.2 2.69 < 0.2
2014 2014-12-16 0.2 2.69 < 0.2
2014 2014-12-16 0.2 2.69 < 0.2
1,1-dichloroethane 0.03 6.14 < 0.03 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-09-22 0.03 6.14 < 0.03
2015 2015-06-17 0.03 6.14 < 0.03
2015 2015-06-16 0.03 6.14 < 0.03
2015 2015-06-16 0.03 6.14 < 0.03
2015 2015-03-17 0.03 6.14 < 0.03
2014 2014-12-16 0.03 6.14 < 0.03
2014 2014-12-16 0.03 6.14 < 0.03
2014 2014-12-16 0.03 6.14 < 0.03
PFNA 0.02 0 < 0.02 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-09-22 0.02 0 < 0.02
2015 2015-06-17 0.02 0 < 0.02
2015 2015-06-16 0.02 0 < 0.02
2015 2015-06-16 0.02 0 < 0.02
2015 2015-03-17 0.02 0 < 0.02
2014 2014-12-16 0.02 0 < 0.02
2014 2014-12-16 0.02 0 < 0.02
2014 2014-12-16 0.02 0 < 0.02
bromomethane 0.2 140 < 0.2 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-09-22 0.2 140 < 0.2
2015 2015-06-17 0.2 140 < 0.2
2015 2015-06-16 0.2 140 < 0.2
2015 2015-06-16 0.2 140 < 0.2
2015 2015-03-17 0.2 140 < 0.2
2014 2014-12-16 0.2 140 < 0.2
2014 2014-12-16 0.2 140 < 0.2
2014 2014-12-16 0.2 140 < 0.2
HCFC-22 0.08 0 < 0.08 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-09-22 0.08 0 < 0.08
2015 2015-06-17 0.08 0 < 0.08
2015 2015-06-16 0.08 0 < 0.08
2015 2015-06-16 0.08 0 < 0.08
2015 2015-03-17 0.08 0 < 0.08
2014 2014-12-16 0.08 0 < 0.08
2014 2014-12-16 0.08 0 < 0.08
2014 2014-12-16 0.08 0 < 0.08
PFBS 0.09 0 < 0.09 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-09-22 0.09 0 < 0.09
2015 2015-06-17 0.09 0 < 0.09
2015 2015-06-16 0.09 0 < 0.09
2015 2015-06-16 0.09 0 < 0.09
2015 2015-03-17 0.09 0 < 0.09
2014 2014-12-16 0.09 0 < 0.09
2014 2014-12-16 0.09 0 < 0.09
2014 2014-12-16 0.09 0 < 0.09
PFHpA 0.01 0 < 0.01 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-09-22 0.01 0 < 0.01
2015 2015-06-17 0.01 0 < 0.01
2015 2015-06-16 0.01 0 < 0.01
2015 2015-06-16 0.01 0 < 0.01
2015 2015-03-17 0.01 0 < 0.01
2014 2014-12-16 0.01 0 < 0.01
2014 2014-12-16 0.01 0 < 0.01
2014 2014-12-16 0.01 0 < 0.01
PFHxS 0.03 0 < 0.03 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-09-22 0.03 0 < 0.03
2015 2015-06-17 0.03 0 < 0.03
2015 2015-06-16 0.03 0 < 0.03
2015 2015-06-16 0.03 0 < 0.03
2015 2015-03-17 0.03 0 < 0.03
2014 2014-12-16 0.03 0 < 0.03
2014 2014-12-16 0.03 0 < 0.03
2014 2014-12-16 0.03 0 < 0.03
PFOS 0.04 0.07 < 0.04 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-09-22 0.04 0.07 < 0.04
2015 2015-06-17 0.04 0.07 < 0.04
2015 2015-06-16 0.04 0.07 < 0.04
2015 2015-06-16 0.04 0.07 < 0.04
2015 2015-03-17 0.04 0.07 < 0.04
2014 2014-12-16 0.04 0.07 < 0.04
2014 2014-12-16 0.04 0.07 < 0.04
2014 2014-12-16 0.04 0.07 < 0.04
1,3-butadiene 0.1 0.0103 < 0.1 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-09-22 0.1 0.0103 < 0.1
2015 2015-06-17 0.1 0.0103 < 0.1
2015 2015-06-16 0.1 0.0103 < 0.1
2015 2015-06-16 0.1 0.0103 < 0.1
2015 2015-03-17 0.1 0.0103 < 0.1
2014 2014-12-16 0.1 0.0103 < 0.1
2014 2014-12-16 0.1 0.0103 < 0.1
2014 2014-12-16 0.1 0.0103 < 0.1
1,2,3-trichloropropane 0.03 0.0004 < 0.03 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-09-22 0.03 0.0004 < 0.03
2015 2015-06-17 0.03 0.0004 < 0.03
2015 2015-06-16 0.03 0.0004 < 0.03
2015 2015-06-16 0.03 0.0004 < 0.03
2015 2015-03-17 0.03 0.0004 < 0.03
2014 2014-12-16 0.03 0.0004 < 0.03
2014 2014-12-16 0.03 0.0004 < 0.03
2014 2014-12-16 0.03 0.0004 < 0.03
Halon 1011 0.06 90 0.0105 [+] Expand Test Data
Year Test Date MRL HRL Test Result
2015 2015-09-22 0.06 90 < 0.06
2015 2015-06-17 0.06 90 < 0.06
2015 2015-06-16 0.06 90 < 0.06
2015 2015-06-16 0.06 90 < 0.06
2015 2015-03-17 0.06 90 < 0.06
2014 2014-12-16 0.06 90 < 0.06
2014 2014-12-16 0.06 90 0.084
2014 2014-12-16 0.06 90 < 0.06

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
CA58480 lead 2017-01-01 2019-12-31 0mg/L
CA55021 lead 2014-01-01 2016-12-31 0mg/L
CA37512 lead 2011-01-01 2013-12-31 0.011mg/L
401000110242L lead 2010-01-01 2010-12-31 0.005mg/L

Violations


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

Compliance Dates Rule Violation Type Contaminant Name Status
2012-01-01 - 2012-12-31 Nitrates Monitoring, Regular Nitrate Returned to Compliance
1996-08-01 - 1996-08-31 Total Trihalomethanes 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.