Where does the water in 49220 come from?

Water for zip code 49220 in Addison, Michigan 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 49220

Addison, Michigan · Lenawee County

333 PPM

19.5 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

2 USGS-backed sources

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 49220

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
Adrian MI0000040	surface water	337 PPM Very Hard	23,663	High Confidence — USGS Monitoring
Addison MI0000030	groundwater	180 PPM Hard	605	High Confidence — USGS Monitoring

Adrian

MI0000040

Very Hard

337 PPMsurface water23,663 servedHigh Confidence — USGS Monitoring

Addison

MI0000030

Hard

180 PPMgroundwater605 servedHigh Confidence — USGS Monitoring

Nearby Zip Codes

49282337 49253337 49233337 49249100 49262100 49265328 49230229 49234230 49247337 49235337 49246230 49271100

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 Addison, MI (49220).

Submit Your Data

Frequently Asked Questions

Is the water hard in Addison, MI (49220)?

The average water hardness in 49220 is 333 PPM (19.5 GPG), which is classified as very hard.

Do I need a water softener in 49220?

With hardness of 333 PPM, a water softener is recommended for homes in 49220.

Is hard water in 49220 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 49220?

Zip code 49220 in Addison, Michigan is served by 2 water systems.