The Cameron Peak Fire burned from August through December 2020, becoming the largest wildfire in Colorado history and covering over 208,000 acres in Larimer County. The fire moved through the drainage basins above Loveland, including portions of the Big Thompson watershed from which Loveland Water and Power draws its supply. The post-fire effects on that watershed, and on the water that flows from it to Loveland homes, are a legitimate topic for any homeowner thinking about the long-term health of their copper plumbing.
This post is about what fire ash and soil disturbance do to watershed chemistry, what LWP did to manage the effects, and what Loveland homeowners with aging copper systems should understand as context for any pipe-related decisions they are making now.
What Post-Fire Watershed Chemistry Looks Like
When a fire burns through a forested watershed, it changes the soil and the runoff chemistry in several ways. The immediate effect is ash and sediment loading: the first post-fire rainstorms carry significant quantities of burned organic material, mineral ash, and dislodged soil into the streams and reservoirs below. Fire-altered soil also loses its ability to absorb rainfall rapidly, which increases surface runoff and erosion in the first one to three post-fire years.
The water chemistry shifts that follow include changes in turbidity (sediment load), total dissolved solids, pH, and the concentrations of metals that leach from fire-altered soil. Ash is alkaline, which can raise stream pH in the immediate aftermath of a fire. As organic material decomposes and the soil chemistry stabilizes over subsequent years, the pH typically normalizes. The duration and magnitude of these changes depend on the intensity of the burn, the size of the watershed, and the speed of revegetation.
What LWP Did in Response
Loveland Water and Power manages the Big Thompson supply system through Green Ridge Glade Reservoir, a 6,800 acre-foot storage facility in west Loveland that provides buffer capacity and allows LWP to manage the quality of what enters the distribution system. Post-fire, LWP increased monitoring frequency, adjusted treatment protocols to handle elevated turbidity and the changing chemistry of post-fire runoff, and worked within the Larimer County post-fire response framework.
LWP distributes treated water that meets all EPA and state standards. The post-fire period did not produce water that failed quality standards for Loveland customers. What it did produce was an interval during which the raw water entering the treatment plant had different characteristics than it did in pre-fire years, requiring treatment adjustment to produce the same finished water quality.
What This Means for Copper Pipes Downstream
The relationship between distributed water chemistry and copper pipe corrosion is real but long-term. Water chemistry is one of the variables in the pinhole corrosion mechanism that affects copper supply pipes over decades. The corrosion rate in copper is influenced by pH, dissolved oxygen, chloride concentration, total dissolved solids, and flow velocity. Changes in any of these variables, sustained over time, affect the rate at which copper corrodes from the inside.
Post-fire water chemistry changes are generally temporary; watershed chemistry tends to normalize over three to seven years as vegetation re-establishes. But for a home with copper supply in the 35-50 year range, even a few years of slightly altered chemistry arriving at an already-stressed pipe system adds to the cumulative corrosion account.
It is important to be precise about this: post-fire watershed chemistry is one factor among several. Loveland's moderately hard water chemistry (which long predates the fire) has been acting on copper pipes for the entire service life of the pipe. The fire's contribution to post-2020 water chemistry is a chapter in a longer story, not a new cause for alarm. Homeowners should understand it as context, not as a standalone driver of pipe failure.
The Practical Takeaway for Loveland Homeowners
For a homeowner whose copper supply is twenty years old or newer, the Cameron Peak watershed event is background information. For a homeowner with copper that is now forty or fifty years old, it is one more reason to take the proactive assessment seriously.
The assessment does not require any significant action in most cases. It starts with a visual inspection of exposed copper runs: the under-sink supplies, the basement horizontal lines, any accessible branch runs. A technician who can look at the pipe and read the corrosion pattern, scale distribution, and fitting condition on a Loveland home's copper can make a judgment about where that system is in its service life and what its trajectory looks like.
| Copper age | Post-fire context | Recommended action |
|---|---|---|
| Under 25 years | Minimal additional risk from water chemistry changes | Standard monitoring |
| 25-40 years | System in normal wear range; water chemistry is one background factor | Inspect exposed runs; repair singles |
| 40-55 years | System in active risk range; all contributing factors relevant | Full exposed-run inspection; discuss plan |
| Over 55 years | System past designed service life; water chemistry accelerates existing risk | Repipe plan warranted |
The Big Thompson Watershed Going Forward
The Cameron Peak Fire area is in active recovery. Reforestation and revegetation work in the watershed began in 2021 and continues. The Big Thompson River corridor itself has experienced restoration attention following both the fire and the legacy effects of the 1976 flood that reshaped the canyon. LWP continues to monitor raw water quality from the watershed and adjusts treatment accordingly.
The long-term outlook for the Big Thompson watershed above Loveland is one of gradual recovery. The water chemistry that Loveland homeowners will receive in 2030 and beyond will reflect a watershed that has moved meaningfully toward pre-fire conditions. The effects on copper pipe that were relevant in 2021-2024 will diminish as the watershed stabilizes. Call (303) 552-3896 to discuss water chemistry context as part of a copper pipe assessment for any west-side or central Loveland home.
What to Do If You Notice Changes at the Fixture
Call (303) 552-3896 if you notice new fitting weeps or copper staining patterns in a home with pre-2020 copper; the fire-era water chemistry context is part of a complete pipe assessment, not a separate conversation. If a Loveland homeowner notices any of the following, they are worth reporting to LWP and discussing with a plumber: a change in first-draw water color (orangeish tinge suggests pipe corrosion; greenish tinge suggests copper leaching); an unusual taste or odor that was not present previously; grit or particulates at fixtures that were not there before. LWP has a customer reporting system for water quality observations, and a plumber can evaluate whether the source is the distribution water or the home's own pipe corrosion.
The inspection is also the right time to have the PRV pressure reading taken; a home near the elevated end of LWP’s distribution range, combined with older copper, is the combination that the fire-era water chemistry would have stressed most. Call (303) 552-3896 to book a copper pipe inspection that reads what the water has done to the supply system and gives a clear picture of where the home's plumbing stands. The west and central Loveland neighborhoods carry the oldest copper in the city and the closest proximity to the post-fire watershed; an honest inspection there is worth the hour.