Hard water in Maywood, CA

Tap water hardness
171mg/L
10.0gpg
HardCounty estimate

County estimate from 979 water samples in Los Angeles County · July 2026

CA typical
121 mg/L
Softener for 3 people
24k grain
Data
County estimate

Water samples from around Maywood put hardness at about 171 mg/L (10.0 gpg), which would be hard on the USGS scale. Treat this as a rough guide: it is the median of 979 samples taken across Los Angeles County, mostly wells and streams, not a test of Maywood's treated tap water.

Maywood on the hardness scale, with nearby cities
060120180240300360+CA typical 121Pico Rivera: 45 mg/LPico Rivera 45Commerce: 75 mg/LCommerce 75Florence-Graham: 121 mg/LFlorence-Graham 121Willowbrook: 121 mg/LWillowbrook 121East Los Angeles: 123 mg/LEast Los Angeles 123Huntington Park: 171 mg/LHuntington Park 171Bell Gardens: 171 mg/LBell Gardens 171Lynwood: 171 mg/LLynwood 171South Gate: 217 mg/LSouth Gate 217Downey: 247 mg/LDowney 247Maywood 171mg/L as calcium carbonate060120180240300360+CA 121Commerce: 75 mg/LCommerce 75Florence-Graham: 121 mg/LFlorence-G. 121East Los Angeles: 123 mg/LEast Los A. 123Huntington Park: 171 mg/LHuntington. 171Bell Gardens: 171 mg/LBell Garde. 171South Gate: 217 mg/LSouth Gate 217171 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

At 171 mg/L, Maywood is 50 mg/L above the typical California figure of 121. Of the 10 nearest cities we track, 5 have softer water and 2 have harder. The range nearby runs from 45 mg/L in Pico Rivera to 247 in Downey.

What 171 mg/L means at home

Expect white crust on faucets and showerheads, plus spots on dishes that come out of the dishwasher.

Kettles collect scale quickly. Water heaters build up sediment at the bottom of the tank, which makes them work harder over time.

Soap and detergent need a little more to lather, and soap scum shows up in the tub.

Hardness is not a health problem, and EPA sets no limit for it. It is a matter of scale and soap.

What to do about it

At 171 mg/L most of the trouble is scale, and only a few things deal with it.

Ion-exchange water softener

The standard whole-house fix. It swaps calcium and magnesium for sodium or potassium and needs salt plus a drain. Size it with the calculator below.

Salt-free conditioner

No salt and no drain line. It changes how minerals form scale instead of removing them, so water still tests hard.

Reverse osmosis or carbon filter

Under-sink reverse osmosis removes minerals from drinking water only. Plain carbon filters improve taste but do not soften.

Softener size for Maywood

3 people × 75 gallons a day × 10.0 gpg = 2,250 grains a day. A 24,000-grain unit regenerates about every 10 days.

Size it for your household

EPA record for Maywood's water system

We could not match Maywood to a community water system in EPA's records. Your water bill or the yearly Consumer Confidence Report names the system and its ID.

Questions

Is Maywood water hard?

Yes. It measures about 171 mg/L (10.0 grains per gallon), which the USGS classes as hard.

What is the water hardness in Maywood in grains per gallon?

About 10.0 gpg. One grain per gallon equals 17.1 mg/L, so 171 mg/L divided by 17.1 gives 10.0.

What size water softener do I need in Maywood?

For 3 people using 75 gallons each per day, 10.0 gpg works out to about 2,250 grains a day. A 24,000-grain softener covers that with a regeneration about every 10 days.

Nearby cities

All 515 cities in California

Hardness data: TapWaterData US Water Hardness (county estimate, July 4, 2026), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.