Where does the water in 17343 come from?

Water for zip code 17343 in Mc Knightstown, Pennsylvania 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 17343

Mc Knightstown, Pennsylvania · Adams County

128 PPM

7.5 GPG

Moderately 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 17343

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
Gettysburg Muni Auth PA7010019	surface water	132 PPM Moderately Hard	12,425	High Confidence — USGS Monitoring
Arendtsville Muni Water Sys PA7010001	groundwater	85 PPM Slightly Hard	1,200	High Confidence — USGS Monitoring

Gettysburg Muni Auth

PA7010019

Moderately Hard

132 PPMsurface water12,425 servedHigh Confidence — USGS Monitoring

Arendtsville Muni Water Sys

PA7010001

Slightly Hard

85 PPMgroundwater1,200 servedHigh Confidence — USGS Monitoring

Nearby Zip Codes

17353128 17307121 1732599 17320115 1722279 17306125 17304126 1721479 1723778 1732492 21727121 17350101

What This Means For You

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

Moderately Hard Water

Your water is moderately hard. You're likely seeing scale buildup on fixtures, spotty dishes, and may notice dry skin or hair. A water softener or conditioner can help.

Recommended Products

Water Hardness Test Kit

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

Salt-Free Water Conditioner

Our PickSpringWell Salt-Free Cartridge

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

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 Mc Knightstown, PA (17343).

Submit Your Data

Frequently Asked Questions

Is the water hard in Mc Knightstown, PA (17343)?

The average water hardness in 17343 is 128 PPM (7.5 GPG), which is classified as moderately hard.

Do I need a water softener in 17343?

With hardness of 128 PPM, a water softener is worth considering for homes in 17343.

Is hard water in 17343 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 17343?

Zip code 17343 in Mc Knightstown, Pennsylvania is served by 2 water systems.