Where does the water in 50118 come from?

Water for zip code 50118 in Hartford, Iowa is provided by 3 water systems. Contact your local utility for specific source information, or check our detailed page for your area.

Water Hardness in 50118

Hartford, Iowa · Warren County

289 PPM

16.9 GPG

Very Hard

0Soft60120180300+

High Confidence - USGS Monitoring

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 USGS-backed sources

3 matched systems total for this ZIP; USGS monitoring is used where treated-water reports are unavailable.

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 50118

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.

Water System	Source	Hardness	Pop. Served	Data Source
Warren Water District IA9133701	surface water	233 PPM Hard	20,095	High Confidence - USGS Monitoring
Indianola Water Supply IA9133075	groundwater	233 PPM Hard	15,833	High Confidence - USGS Monitoring
Norwalk Water Supply IA9164078	surface water	430 PPM Very Hard	14,334	High Confidence - USGS Monitoring

Warren Water District

IA9133701

Hard

233 PPMsurface water20,095 servedHigh Confidence - USGS Monitoring

Indianola Water Supply

IA9133075

Hard

233 PPMgroundwater15,833 servedHigh Confidence - USGS Monitoring

Norwalk Water Supply

IA9164078

Very Hard

430 PPMsurface water14,334 servedHigh Confidence - USGS Monitoring

Nearby Zip Codes

50252350 50047290 50237140 50225341 50001289 50228256 50320140 50166288 50009144 50169141 50125289 50315140

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.

Methodology Data sources How to test your water

Know your water hardness?

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Frequently Asked Questions

Is the water hard in Hartford, IA (50118)?

The average water hardness in 50118 is 289 PPM (16.9 GPG), which is classified as very hard.

Do I need a water softener in 50118?

With hardness of 289 PPM, a water softener is recommended for homes in 50118.

Is hard water in 50118 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 50118?

Zip code 50118 in Hartford, Iowa is served by 3 water systems.