Chapter 1 of 7
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Summary. Start with §1.1 for the figures that shape North County water, then §1.2 for the checks worth doing in your first weeks in a house; chapters 2 to 7 then take one household water topic each.
Chapter 1 · revised · checked against district reports, code and agency pages
Sections in this chapter
- 1.1North County Water at a Glance6 min
North County plumbing, explained for homeowners: this section gathers the figures that shape water in Fallbrook, Bonsall, Rainbow, Vista, Escondido and Valley Center houses, each taken from a district report, state code, County rule, federal agency or maker's manual.
- 1.2First Checks for a New-to-You House4 min
In your first weeks in a North County house, learn which district supplies it, find the meter and the house valve, run a 15-minute leak check, read the pressure at a hose bib, and look over the water heater and any backflow device.
Chapter overview
How is the handbook numbered?
Chapters run from 1 to 7. Each chapter holds numbered sections, so §3.2 is the second section of chapter 3, and the numbered headings inside a section run 3.2.1, 3.2.2 and on. A "See also" line at the end of a section points to related sections by number, and every page ends with links to the previous and next section and chapter.
Margin notes sit beside the text on a wide screen and drop into the text, set off in a tinted box, on a phone. They carry the short facts worth remembering, each with its source. Terms with a dotted underline open the glossary; the index runs from avocado trees to Zone 0.
Which chapter answers which problem?
| What you are seeing | Chapter |
|---|---|
| White crust on aerators and shower doors, a softener question | 2, Hard water |
| Banging pipes, a toilet that keeps running, a gauge reading over 80 psi | 3, Water pressure |
| A meter that moves with everything off, a high bill, damp flooring | 4, Leaks and repairs |
| A backflow test notice, watering a slope or a grove, rebates | 5, Irrigation and backflow |
| Sediment in the tank, a dripping relief valve pipe, a replacement quote | 6, Water heaters |
| Watering days, preparing for fire season, a private well | 7, Drought, wildfire and wells |
Where do the figures come from?
From the bodies that set the rules or measure the water: each district's yearly water quality report, from Fallbrook and Rainbow down to Vista, Escondido and Valley Center; the 2025 California Plumbing Code; the State Water Board; San Diego County; EPA, DOE and USGS; university extension services, including UC ANR; and the Contractors State License Board. Each section names its own sources at the end, and the about page Appendix A explains how they were read.
What is this handbook not?
It is not a plumbing contractor and does no installs, repairs or service calls. Steps marked as homeowner tasks are the low-risk ones: reading a meter, reading a gauge, turning a shutoff, swapping a toilet flapper. Regulators, relief valves, gas connections, venting, backflow assemblies and main-line work belong to licensed people, and the sections say so where it matters. If you're unsure, call a licensed plumber.