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: CA5210005 Type: Community water system EPA Region: 09
Primary Service Area: Residential Area
Primary Source: Ground water
Population Served: 3,316
Contact Information SLACK, MARTHA SLACK, MARTHA 22099 River View Drive COTTONWOOD, CA 96022
This public water system services 1 municipality in 1 county.
Summary Results
A summary view of tests in which a water contaminant found to exceed the Maximum Contaminant Level (MCL) set by the EPA.
This a view of violations of maximum contaminant levels. Use the expanded view see result data for a drinking water contaminant, the minimum level that can be recognized in a test (MRL), and upper limit that is considered healthy (HRL).
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 level. Lead and copper can be — and often are — deposited in drinking water in between the water facility and your tap.
Sample ID
Contaminant
Sampling Start Date
Sampling End Date
Result
CA56457
lead
2014-01-01
2016-12-31
0mg/L
CA40548
lead
2011-01-01
2013-12-31
0mg/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
Total Coliform Rule
Maximum Contaminant Level Violation, Monthly (TCR)
Coliform (TCR)
Known
2012-05-01 - 2012-05-31
Total Coliform Rule
Monitoring, Routine Minor (TCR)
Coliform (TCR)
Returned to Compliance
2010-11-01 - 2010-11-30
Total Coliform Rule
Maximum Contaminant Level Violation, Monthly (TCR)
Coliform (TCR)
Known
2004-01-01 - 2004-01-31
Total Coliform Rule
Monitoring, Routine Minor (TCR)
Coliform (TCR)
Known
- 2000-03-01
Lead and Copper Rule
Initial Tap Sampling for Pb and Cu
Lead and Copper Rule
Returned to Compliance
Local Water Testing
Find a lab in your area so you can get your tap or well water tested. This list contains both governmental and private labs, all of which are EPA-certified for drinking water testing.
Unable to identify any billing information about Rio Alto Water District (CA5210005).
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.
