If your household water in Butte County tastes metallic or causes occasional plumbing issues, you might suspect acidic water is the cause. Acidic water typically means low pH, which can impact pipes and water quality. But how low is low? And how might this affect your home?
What first steps should I take to check if my water is acidic?
Start with simple observations: does your water corrode metal fixtures or leave stains? You can measure your water’s pH at home using a test kit available online or at hardware stores. These kits provide a basic pH level indication but for precise results, sending a sample to a certified laboratory is best. This ensures you know exactly how acidic your water may be.
What do the terms detected, median, and range mean in Butte County's pH sampling data?
The U.S. Geological Survey has sampled groundwater across 78 wells in Butte County from depths between 20 and 1194 feet. In 1348 samples taken during 2010-2026, pH was detected in every sample, meaning each measurement found pH levels rather than being below detection capability. The median pH was 7.9, indicating a slightly basic central tendency. The range was wide—from as low as 3.5 to as high as 10.0 standard units—showing some wells had more acidic water than others. This range does not predict your specific well’s pH but shows possible variation in the area.
How do well depth and source type affect expectations for water pH?
Because samples came from wells ranging from shallow (20 feet) to very deep (over 1000 feet), water pH can vary with depth. Deeper wells may encounter different mineral layers, which can raise or lower pH. If your household draws from a shallower source, your water's pH might differ from the median. Knowing your well’s depth helps anticipate whether acidic water is more likely, but testing is required to confirm.
Can the plumbing materials or age of my home influence pH readings separately from the water source?
Yes. Materials such as older iron or galvanized pipes can react with water, sometimes lowering pH or accelerating corrosion. Newer plumbing using plastic or copper may interact less. These reactions can affect how acidic the water appears to be when it reaches your tap, apart from the source water’s pH. If you suspect plumbing influence, consider testing both water directly from the source and after it passes through your home's pipes.
What does a certified laboratory pH test report, and how should I interpret it?
A certified lab will provide a specific pH value with precision and clarity, typically expressed in standard units. This number shows the acidity or alkalinity of your water at the time sampled. The Environmental Protection Agency (EPA) suggests a secondary standard pH range of 6.5 to 8.5 for aesthetic and plumbing considerations, not health. A pH below 6.5 may indicate acidic conditions that can corrode pipes or affect taste. Results outside this range warrant consideration of treatment options.
What are the long-term effects if acidic water is not addressed?
Continued exposure to acidic water can lead to gradual deterioration of plumbing materials, potentially causing leaks, pinhole corrosion, and metallic taste. It can also stain fixtures and decrease the lifespan of water-using appliances. While acidic water is not a health-based violation, managing its presence helps protect your home infrastructure and improves water quality comfort.
To effectively address acidic water issues identified by testing, consider the C-Series Acidic / Low-pH Water Filter. This system ships ready to configure for household use and helps adjust water pH to more neutral levels, supporting plumbing longevity and water taste. Assess your water with testing first, then match your treatment needs to measured pH levels for best results.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2026-06-18. These figures describe groundwater sampled in this area. They are not a test of any individual private well - only a test of that well can establish its own water.
On record: U.S. Geological Survey sampling of pH in the aquifer (Butte County): 1348 results from 78 wells, median 7.9 standard units, range 3.5-10.0 standard units; EPA secondary standard for pH is 6.5-8.5 (aesthetic/corrosivity, not health-based); 5 of 1348 sampled results fell below 6.5