Corvallis, MT tap water
Part of Corvallis is supplied by Centennial Homeowner's Association, Inc. Here's what its water means for your fish.
Disinfectant
Not confirmed
We couldn't confirm how utility water here is disinfected. US utilities use chlorine or chloramine, and chloramine doesn't gas off when water sits out.
Safety for fish and shrimp
Nitrite (NO₂)
Not detected (Low)
Not detected in testing, so any nitrite in your tank comes from the tank itself.
From EPA monitoring data (2013–2019).
Nitrate (NO₃)
7.2 ppm (Low)
Water changes can't take your tank's nitrate below this level.
From EPA monitoring data (2013–2019).
Water chemistry
General hardness
Area estimate9–172 ppm
Typical 68 ppm
Soft. Good for tetras, rasboras and most shrimp. Livebearers, snails and African cichlids prefer harder water.
Area estimate from nearby wells: USGS well samples in your county (2001).
Carbonate hardness (alkalinity)
Area estimate11–175 ppm
Typical 70 ppm
Moderate buffering. pH should stay fairly steady.
Area estimate from nearby wells: USGS well samples in your county (2001).
pH
Area estimate6.3–7.7
Typical 7.1
Most community fish do well here. Stable water matters more than the exact number.
Area estimate from nearby wells: USGS well samples in your county (2001).
Total dissolved solids
Area estimate32–269 ppm
Typical 105 ppm
A rough measure of everything dissolved in the water. RO water reads near 0, so TDS is a quick way to compare waters.
Area estimate from nearby wells: USGS well samples in your county (2001).
Who supplies Corvallis, MT
Centennial Homeowner's Association, Inc
Serves 30% of residents · Groundwater (wells) · Disinfectant not listed
We couldn't fully map which utility serves Corvallis. These numbers come from the utility we matched, which serves about 30% of residents.
Our data comes from public records and is still incomplete. Many utilities don't publish every number, so we're adding more all the time. Your city's range is a starting point: testing your own tap is the only way to know exactly what's in it.
Tap water lookup covers US cities only for now. Want to know why it matters? Read our story on tap water.
Compiled by Shoal & Stem from public records. Free to cite with a link.