Mountain House Community Services Dist. Water System'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: CA3910027
Type: Community water system
EPA Region: 09
Primary Service Area: Residential Area
Primary Source: Surface water
Population Served: 14,570
Contact Information

This public water system services 1 county.

We could not find test result data for Mountain House Community Services Dist..
However, this area is serviced by 559 or more other public water systems. Check your water bill to see which specific system applies. Here is a list of related systems:

See 549 more related public water systems »

Summary Results

A summary view of tests in which a water contaminant found to exceed the Maximum Contaminant Level (MCL) set by the EPA.

We couldn't find any records of contaminants exceeding the regulated limits in your water.

Other Water Contaminants Tested

The following contaminants were tested and found to be within national EPA guidelines.

We couldn't find any records of contaminants in your water.

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 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
CA62300 lead 2018-01-01 2018-12-31 0.002mg/L
CA59007 lead 2017-01-01 2017-12-31 0.0014mg/L
CA55102 lead 2016-01-01 2016-12-31 0.0054mg/L
CA49038 lead 2015-01-01 2015-12-31 0.0018mg/L
CA45288 lead 2014-01-01 2014-12-31 0.0013mg/L
CA37946 lead 2013-01-01 2013-12-31 0.0012mg/L
391002712242L lead 2012-01-01 2012-12-31 0.0018mg/L
CA37610 lead 2012-01-01 2012-12-31 0.0018mg/L
391002711241L lead 2011-01-01 2011-12-31 0.0022mg/L
391002710235L lead 2010-01-01 2010-12-31 0.0064mg/L
391002709197L lead 2009-01-01 2009-12-31 0.0024mg/L
391002708013L lead 2008-01-01 2008-12-31 0.006mg/L
391002708218L lead 2008-01-01 2008-12-31 0.0011mg/L


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

Compliance Dates Rule Violation Type Contaminant Name Status
2010-02-01 - 2010-02-28 Total Coliform Rule Monitoring, Routine Minor (TCR) Coliform (TCR) Known
2005-01-01 - 2005-03-31 Stage 1 Disinfectants and Disinfection Byproducts Rule Maximum Contaminant Level Violation, Average TTHM 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.

Lab Location Zip Code
Castle Analytical Laboratory Atwater, CA 95301
Aqualab Twain Harte, CA 95383
Brelje and Race Laboratories, Inc. Santa Rosa, CA 95404

Water Service Information

Convenient information about your water service.

Unable to identify any billing information about Mountain House Community Services Dist. (CA3910027).

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.


The origin of'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.