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Water Hardness in 57719

Box Elder, South Dakota · Pennington County

150 PPM
8.8 GPG
Moderately Hard
0Soft60120180300+
Verified - Annual Water Quality Report

Dataset updated March 9, 2026Matched to 3 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology

Source context

How this ZIP reading is built

This ZIP reading is built from 3 matched water systems. When more than one system is matched, the displayed value is weighted toward larger known service populations when that data is available.

Source basis
3 verified treated-water sources
3 matched systems total for this ZIP; treated-water reports are prioritized when available.
Water source profile
Primarily surface water
Surface-water hardness can shift with reservoirs, runoff, season, and treatment. This profile is weighted by known population served across matched systems.
Data recency
March 9, 2026
Dataset rebuilt March 9, 2026; individual utility reporting years can vary.

Hardness is a mineral-content reading, not a drinking-water safety rating. Use it for scale, appliance, and softener decisions; check your utility report or test your tap before sizing treatment equipment. See how we calculate local readings.

Water Systems Serving 57719

These are the systems matched to this ZIP code. The displayed ZIP value is weighted toward larger known service populations when population data is available.

3 water systems
PWSID is the public water system identifier. Data Source shows whether the hardness value comes from a treated-water report, USGS monitoring, or a local estimate; source year is shown when available.
Rapid City
SD4600406
Moderately Hard
150 PPMsurface water72,009 servedVerified - Annual Water Quality Report
Source water: 198 PPM
Box Elder
SD4600046
Moderately Hard
150 PPMgroundwater14,000 servedVerified - Annual Water Quality Report
Source water: 558 PPM
Rapid Valley Sanitary District
SD4600274
Moderately Hard
150 PPMsurface water11,408 servedVerified - Annual Water Quality Report
Source water: 810 PPM

Nearby Zip Codes

5770639857761155577011505776951257785597577031505771856257725150577671505770215057751150

What This Means For You

Use this ZIP reading as a local planning estimate, not a final treatment specification. Hardness can vary by utility zone, seasonal blend, private well, and building plumbing. Confirm your tap reading with a utility report or home hardness test before sizing equipment.

MethodologyData sourcesHow to test your water

Know your water hardness?

If you've tested your water or have your utility's CCR report, share your reading to help us improve accuracy for Box Elder, SD (57719).

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Frequently Asked Questions

Is the water hard in Box Elder, SD (57719)?

The average water hardness in 57719 is 150 PPM (8.8 GPG), which is classified as moderately hard.

Do I need a water softener in 57719?

With hardness of 150 PPM, a water softener is worth considering for homes in 57719.

Is hard water in 57719 safe to drink?

Water hardness itself is a mineral-content reading, not a drinking-water safety rating. Calcium and magnesium are naturally occurring minerals, but you should check your utility's Consumer Confidence Report for contaminant and compliance information.

How many water systems serve 57719?

Zip code 57719 in Box Elder, South Dakota is served by 3 water systems.

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