Graham, WA tap water
Supplied mostly by Southwood, plus 2 other utilities. Here's what the water means for your fish.
Disinfectant
Chlorine
Your water is treated with chlorine. It slowly gases off from standing water, and any water conditioner removes 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 (2013–2018).
Nitrate (NO₃)
Up to 44 ppm (Low)
Typically not detected
Not detected in testing, so water changes lower your tank's nitrate well.
From EPA monitoring data; City of Tacoma Water Division and Southwood and Lakewood Water District, which supplies Firgrove Mutual Inc (2012–2025).
Water chemistry
General hardness
Not published yet
We haven't found this number yet. A drop test kit gives you your exact reading.
Carbonate hardness (alkalinity)
Supplier's figure24–89 ppm
Typical 26 ppm
Little buffering. pH can drop quickly between water changes, especially with CO₂ or an older tank.
From the utility that supplies yours: City of Tacoma Water Division, which supplies Southwood; City of Tacoma Water Division and Southwood, which supplies Firgrove Mutual Inc (2012–2019).
pH
Not published yet
We haven't found this number yet. A drop test kit gives you your exact reading.
Who supplies Graham, WA
Southwood
Serves 52% of residents · Buys water from City of Tacoma Water Division · Chlorine
Firgrove Mutual Inc
Serves 15% of residents · Buys water from City of Tacoma Water Division · Chlorine
Graham Hill Mutual Water Co Inc
Serves 8% of residents · Groundwater (wells) · Disinfectant not listed
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.