NID annually treats more than 2.8 billion gallons of water at six state-of -the-art treatment plants. The process to transform pure mountain raw water into quality drinking water is repeated day-in and day-out for over 21,000 customer connections.

NID closely monitors the quality of our drinking water by testing for more than 100 possible substances in our supply on a regular basis.

“We are constantly testing for even trace amounts of contaminants in the water we deliver to our customers,” says NID’s Water Treatment Superintendent Shad Chittock. “All of our tests and efforts are aimed at one goal: to make sure we provide the highest quality water possible and that your water reliably meets or exceeds all the standards for safe drinking water quality set by California and federal regulations.”

Each year, the district publishes a Water Quality Report (WQR) that lists test results for regulated substances at each treatment plant. The latest report has just been released with information about the quality of NID’s drinking water for reporting year 2023.

“NID is pleased to report that the water provided to district customers met or surpassed all State of California and EPA drinking water health standards,” says Chittock. “The constituents we test for are not detected--or detected in only trace amounts--in the water we deliver to you.

Click here to read the new report, reporting year 2023.

The source water is pure NID is in an ideal location. Water comes directly from the mountain snowpack, and it doesn't carry the trace tastes or odors sometimes found in downstream water supplies. A clear, healthy water supply depends, of course, on more than geography.

NID's staff and water treatment technology combine to assure customers that the water they receive meets and exceeds all state and federal public health standards. It all begins on 70,000 acres of mountain watershed, where melting snow fills district reservoirs. Canals and pipelines that carry water to the foothills are relatively safe from industrial pollutants that can affect raw water.

"We're first in line on the watershed; we have excellent source water," says Chittock, who heads a team of 10 state -licensed water treatment specialists responsible for operating the six water treatment plants.

VIDEO: E. George Treatment Plant: NID Delivers Clean, Safe Drinking Water NID delivers a reliable supply of high-quality drinking water that exceeds state and federal standards. How's it done? Take a tour of the plant with Guide Coby McCoy, NID Water Treatment Supervisor. Watch a short video (5:02 minutes)