Lynnfield, MA tap water
Supplied mostly by Lynnfield Center Water District, plus 1 other utility. Here's what the water means for your fish.
Disinfectant
Chloramine
Your water is treated with chloramine. Unlike chlorine, it doesn't gas off when water sits out, and many pitcher and fridge filters aren't rated to remove it. Conditioners that list chloramine on the label break it apart, which frees a little ammonia. Some utilities switch to plain chlorine for a few weeks a year.
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 (2014–2017).
Nitrate (NO₃)
0.2–33 ppm (Worth knowing)
Typical 11 ppm
Water changes can't take your tank's nitrate below this level.
From EPA monitoring data; MWRA, which supplies Lynnfield Water Dist. (MWRA) (2012–2024).
Water chemistry
General hardness
Supplier's figure16 ppm
Soft. Good for tetras, rasboras and most shrimp. Livebearers, snails and African cichlids prefer harder water.
From the utility that supplies yours: MWRA, which supplies Lynnfield Center Water District; MWRA, which supplies Lynnfield Water Dist. (MWRA).
Carbonate hardness (alkalinity)
Supplier's figure40–43 ppm
Typical 42 ppm
Moderate buffering. pH should stay fairly steady.
From the utility that supplies yours: MWRA, which supplies Lynnfield Center Water District; MWRA, which supplies Lynnfield Water Dist. (MWRA).
pH
7–9.7
Typical 7.3
Most community fish do well here. Stable water matters more than the exact number.
From EPA monitoring data; MWRA, which supplies Lynnfield Water Dist. (MWRA) (2013–2019).
Who supplies Lynnfield, MA
Lynnfield Center Water District
Serves 66% of residents · Buys water from MWRA · Chloramine
Lynnfield Water Dist. (MWRA)
Serves 34% of residents · Buys water from MWRA · Chloramine
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.
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Compiled by Shoal & Stem from public records. Free to cite with a link.