Merlin, OR tap water
About 25% of Merlin is inside a utility's service area. Homes outside it likely use private wells, which no utility tests.
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. Private wells aren't treated by a utility, so there's no chlorine or chloramine unless a treatment system adds it.
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 (2012–2019).
Nitrate (NO₃)
0.9–6 ppm (Low)
Typical 6 ppm
Water changes can't take your tank's nitrate below this level.
From EPA monitoring data (2012–2019).
Water chemistry
General hardness
Area estimate26–210 ppm
Typical 81 ppm
Moderately soft to medium. Suits most community fish and plants.
Area estimate from nearby wells: USGS well samples in your state (2000–2020).
Carbonate hardness (alkalinity)
40 ppm
Moderate buffering. pH should stay fairly steady.
From EPA monitoring data, measured before treatment (2012–2019).
pH
Area estimate6.7–8.4
Typical 7.6
Most community fish do well here. Stable water matters more than the exact number.
Area estimate from nearby wells: USGS well samples in your state (2000–2023).
Total dissolved solids
Area estimate85–354 ppm
Typical 173 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 state (2000–2020).
Who supplies Merlin, OR
Sky Crest Heights Homeowners
Serves 20% of residents · Groundwater (wells) · Disinfectant not listed
City of Grants Pass
Serves 6% of residents · Lake or river water · Chlorine
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.