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North San Luis Obispo County, CaliforniaUpdated

InsideWells, water quality, the groundwater basin, septic, tanks, fire and the house

Ranch House Water

Town notesPaso Robles, Templeton, Atascadero, San Miguel, Creston and Shandon

Wells, tanks, septic and pipes on rural land around Paso Robles

Section front · Fire & Drought

Fire and Drought

Fire and drought shape rural water in north San Luis Obispo County: tanks sized for engines, cleared ground, outages that stop pumps and dry summers.

Updated

Stories

In brief

Large spreading oak over tall dry summer grass, with a pile of fallen dead branches beneath it and a wire fence in front
Dry summer grass and fallen branches under a big oak, the kind of fuel that carries a grass fire.

Most of the rural land around Paso Robles, Templeton, Creston and Shandon sits in fire country, and nearly all of its rain falls in four winter months. This section covers the water side of both facts: what the county asks a house to hold for firefighting, how to keep the ground around it from carrying fire, what happens to a well when PG&E cuts power, and how to make a well last through dry years.

Fire water and cleared ground

New homes under SLO County Fire carry a dedicated reserve of at least 2,500 gallons, and most end up with a 5,000-gallon tank and a roadside connection for engines. Fire water storage sets out those rules, the ban on daisy-chained tanks and the connection spec. Defensible space and water covers the 100-foot clearance the state requires, where the new 5-foot Zone 0 rules stand, clearance around propane tanks, and why sprinklers should not be left running when you evacuate.

Outages and generators

A well pump runs on electricity, so a Public Safety Power Shutoff on a windy day also shuts off the water. Power shutoffs and wells explains PG&E's notices, what water to set aside and who should connect a generator to the pump. The short brief on generator safety in outages gives the distances that keep carbon monoxide out of the house.

Dry years

On the federal drought map for the week of October 27, 2026, San Luis Obispo County was free of drought, but many monitoring wells in the groundwater basin under north county have shown falling levels since the late 1990s. Saving water on a well during drought covers the rain record, leaks, laundry water on the garden and what to do if a well starts to fail.

Where to call

  • SLO County Fire (CAL FIRE SLU) fire marshal — tank sizes for fire, engine connections and cleared ground. Fire marshal's office
  • PG&E — sign up for shutoff warnings and follow outage maps. PSPS page
  • ReadySLO — the county's emergency and evacuation notices. ReadySLO.org
  • DWR — log a well that has gone dry. Dry well reports