Nampa, ID tap water
Supplied by City of Nampa. Here's what its 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 (2013–2019).
Nitrate (NO₃)
27–28 ppm (High)
Typical 27 ppm
High for tap water. Water changes can't take your tank's nitrate below this level.
Published by your utility: City of Nampa's 2024 water quality report.
Chlorine or chloramine at the tap
0.3–0.5 ppm
Typical 0.4 ppm
At tap levels, chlorine and chloramine are toxic to fish, shrimp and the bacteria in a filter. Water conditioners are made for this range.
Published by your utility: City of Nampa's 2024 water quality report.
Water chemistry
General hardness
0–121 ppm
Typical 61 ppm
Soft. Good for tetras, rasboras and most shrimp. Livebearers, snails and African cichlids prefer harder water.
Published by your utility: City of Nampa's 2024 water quality report.
Carbonate hardness (alkalinity)
Area estimate69–309 ppm
Typical 180 ppm
Strong buffering. pH stays steady and hard to lower without RO water.
Area estimate from nearby wells: USGS well samples in your county (2000–2011).
pH
Area estimate7.3–8.1
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 county (2000–2013).
Total dissolved solids
Area estimate63–315 ppm
Typical 175 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 (2000–2011).
Who supplies Nampa, ID
- 2024 water quality report
City of Nampa
Serves 90% of residents · Groundwater (wells) · 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.