Public Water System: Greenfield, City Of'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: CA2710008
Type: Community water system
EPA Region: 09
Primary Service Area: Residential Area
Primary Source: Ground water
Population Served: 17,898
Contact Information
PO BOX 127

This public water system services 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).

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 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. 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
CA41648 lead 2012-01-01 2014-12-31 0mg/L
271000811236LT3 lead 2011-01-01 2011-12-31 0.005mg/L
271000809203LT1 lead 2009-01-01 2009-12-31 0.005mg/L
271000809210L lead 2009-01-01 2009-12-31 0.005mg/L
271000808129L lead 2008-01-01 2008-12-31 0.005mg/L
271000808322L lead 2008-01-01 2008-12-31 0.005mg/L
CA37043 lead 2008-07-01 2008-12-31 0mg/L
CA36008 lead 2008-01-01 2008-06-30 0mg/L


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

Compliance Dates Rule Violation Type Contaminant Name Status
2007-05-01 - 2007-05-31 Total Coliform Rule Maximum Contaminant Level Violation, Monthly (TCR) Coliform (TCR) Returned to Compliance
2005-06-01 - 2005-07-30 Miscellaneous Variance/Exemption/Other Compliance - Returned to Compliance
2002-12-01 - 2002-12-31 Total Coliform Rule Monitoring, Routine Minor (TCR) Coliform (TCR) Returned to Compliance
2001-01-01 - 2001-12-31 Nitrates Monitoring, Regular Nitrate Returned to Compliance
- N/A Total Coliform Rule Monitoring, Repeat Minor (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.


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.