Where does the water in 50222 come from?

Water for zip code 50222 in Peru, Iowa is provided by 2 water systems. Contact your local utility for specific source information, or check our detailed page for your area.

Water Hardness in 50222

Peru, Iowa · Madison County

258 PPM

15.1 GPG

Very Hard

0Soft60120180300+

High Confidence — USGS Monitoring

Dataset updated March 9, 2026Matched to 2 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 2 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

1 USGS-backed source

2 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 50222

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.

2 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
Sirwa #2 (Creston) IA8080701	surface water	283 PPM Very Hard	20,793	Estimated — Nearby Data
Warren Water District IA9133701	surface water	233 PPM Hard	20,095	High Confidence — USGS Monitoring

Sirwa #2 (Creston)

IA8080701

Very Hard

283 PPMsurface water20,793 servedEstimated — Nearby Data

Warren Water District

IA9133701

Hard

233 PPMsurface water20,095 servedHigh Confidence — USGS Monitoring

Nearby Zip Codes

50257260 50149283 50273261 50218259 50240259 50174283 50155258 50033258 50241289 50210289 50229289 50160289

What This Means For You

Recommendations are based on the displayed ZIP hardness reading. Confirm your tap reading before sizing or buying treatment equipment.

Very Hard Water - Treatment Strongly Recommended

Your water is very hard. Without treatment, you can expect significant scale buildup in pipes and appliances, higher energy bills from reduced water heater efficiency, and persistent issues with skin and hair dryness.

Recommended Products

Salt-Based Water Softener

Our PickAFWFilters Fleck 5600SXT 48K Also GreatWhirlpool WHES40E 40K Also GreatAFWFilters 64K Grain Also GreatAFWFilters Iron Pro 2 64K Also GreatSpringWell Filter + Softener Combo

Water Hardness Test Kit

Our PickVarify (150 Strips)Also GreatJNW Direct (150 Strips)

Whole-House Water Filter

Our PickiSpring WGB32B 3-Stage

Water Softener Salt

Our PickMorton Clean & Protect Also GreatDiamond Crystal Bright & Soft

Shower Head Filter

Our PickWeddell Duo Also GreatAquaBliss SF100 Also GreatSprite Pure 7-Setting Also GreatAqua Earth 20-Stage

Learn more: Do I Need a Water Softener? | Salt-Based vs Salt-Free | Size Calculator | How 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 Peru, IA (50222).

Submit Your Data

Frequently Asked Questions

Is the water hard in Peru, IA (50222)?

The average water hardness in 50222 is 258 PPM (15.1 GPG), which is classified as very hard.

Do I need a water softener in 50222?

With hardness of 258 PPM, a water softener is recommended for homes in 50222.

Is hard water in 50222 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 50222?

Zip code 50222 in Peru, Iowa is served by 2 water systems.