Understanding Susanville’s annual water quality report

Safe drinking water depends on regular testing, careful treatment, and clear public information. Each year, the City of Susanville Public Works Department provides a water quality report so customers can see where their water comes from, how it is monitored, and whether test results meet state and federal health standards.

The report may use technical terms, laboratory units, and regulatory limits that are unfamiliar at first. Reading it becomes easier when you know which sections explain the water source, which numbers describe test results, and which notices require attention.

A water quality report is different from a utility bill, sewer service charge, or general infrastructure update. It focuses on drinking water quality and public health, while other city services address collection systems, streets, drainage, and facility maintenance.

What the report is designed to explain

The annual report, often called a Consumer Confidence Report, summarizes the quality of water delivered during the previous monitoring period. It identifies the source or sources, such as groundwater wells, and describes the treatment processes or protective measures used by the water system.

It also lists regulated substances that were detected during testing. A detection does not automatically mean the water is unsafe. Many substances can be present at very low levels while remaining below the applicable public health standard.

The report is intended to give residents reliable information about routine performance. It may also explain violations, monitoring issues, or corrective actions if they occurred. Read the explanatory notes alongside the data instead of judging a result from a single number.

How to read the testing numbers

Several terms appear repeatedly in drinking water reports. The maximum contaminant level, or MCL, is the highest level allowed under a drinking water regulation. The maximum contaminant level goal, or MCLG, is a health-based target that may be set at zero for substances with potential health effects.

A result may be shown in milligrams per liter, micrograms per liter, parts per million, or parts per billion. The units matter: one part per billion is much smaller than one part per million. The report may also show a range of results, an average, or the highest measurement, depending on the substance and testing requirement.

Some entries use “ND,” meaning not detected at the laboratory’s reporting limit. This does not necessarily mean the substance is completely absent. It means the substance was not found at or above the level the test could reliably identify.

Understanding health standards and notices

Health standards are developed for specific substances and exposure assumptions. The report may distinguish between short-term concerns, long-term exposure, and standards based on consumption over many years. Infants, pregnant people, older adults, and those with certain medical conditions can have different sensitivities.

A report may include a special notice about lead, copper, nitrate, disinfection byproducts, or another regulated contaminant. Follow the advice stated in the notice, including any direction about flushing taps, using certified filters, or contacting a health professional.

Water quality can also change inside a building. Plumbing materials, stagnant water, private treatment equipment, and poorly maintained fixtures may affect water at the tap even when the city’s distribution system meets requirements. Questions about a personal health condition should be directed to a qualified medical provider or the appropriate public health agency.

Report term	What it tells you	How to interpret it
MCL	The enforceable regulatory limit	Compare the reported result with this value
MCLG	The health-based goal	It may be lower than the legal limit
Range	The lowest and highest recorded results	Shows variation during the monitoring period
ND	Not detected at the reporting limit	The test did not identify the substance at or above that threshold
Action level	A level that triggers required action, often for lead or copper	It may be based on household tap samples rather than a treatment plant sample
Violation	A failure to meet a monitoring or water quality requirement	Read the explanation and corrective action information

Comparing drinking water with other utility services

Residents sometimes see water, sewer, and related charges together on a city bill, but each service has a different purpose. Drinking water charges support water supply, treatment, testing, distribution, and system maintenance. Sewer charges generally support the collection and treatment of wastewater after it leaves a property.

For a clearer explanation of that separate utility cost, review your sewer service charge. The annual water quality report does not replace billing information, rate schedules, or account records.

The same distinction applies to infrastructure complaints. A damaged sidewalk or curb may affect accessibility and stormwater flow, but it is not evidence of a drinking water problem. Residents can use the city’s guidance for reporting sidewalk damage so the appropriate Public Works team can evaluate it.

What the report can tell you about city operations

Water quality data reflects a larger operating system. Source protection, well or facility maintenance, sampling schedules, laboratory procedures, water storage, pressure management, and distribution repairs all contribute to reliable service.

The report can also help residents understand why conservation and prompt reporting matter. Reduced water waste supports system capacity, while early notice of leaks or unusual conditions can help staff investigate problems before they become larger service issues.

Public infrastructure work may occasionally affect traffic, access, or nearby facilities. When a community event requires a temporary change in street access, residents and organizers should follow the process for applying for a street closure. That process is separate from drinking water monitoring but coordinated through the same municipal infrastructure framework.

Practical steps for using the report

Treat the report as a reference document that can support informed decisions throughout the year. Keep a copy with household records, especially if you manage a rental property, childcare setting, business, or facility that needs water information for occupants or customers.

When reviewing the latest edition, focus on these actions:

Identify the listed water source and any treatment or protection measures.
Check whether substances were detected and compare results with the applicable standards.
Read footnotes explaining units, sampling locations, averages, ranges, and reporting limits.
Look for violations, health advisories, or recommended actions.
Contact the City of Susanville Public Works Department through its official information channels if you need clarification about the report or a water service concern.

Staying informed about water safety

Annual reporting provides a regular snapshot, while water systems are monitored throughout the year. A report may not describe every operational event, repair, taste concern, or temporary advisory. Follow official city notices for time-sensitive updates and use emergency contacts when an immediate water or infrastructure issue requires attention.

Residents can also support water reliability by conserving during dry conditions, protecting outdoor plumbing from damage, and reporting leaks or unusual changes through the proper city channels. These habits complement the testing and maintenance work described in the report.

Review the newest annual water quality report when it becomes available, share relevant information with people in your household, and contact Susanville Public Works for authoritative assistance with drinking water questions or service concerns.