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City water profile

Downingtown water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Downingtown, Pennsylvania.

Median indexed hardness

83PPM

One indexed ZIP

Range 82.8–82.8 PPM

State comparison
1 PPM below
State hardness rank
#36 of 50
Matched utilities
1
Active health records
0

City summary

What the indexed records say

Downingtown has 1 published ZIP profile across Chester County. The indexed median is 83 PPM, compared with 84 PPM across Pennsylvania.

Among the 50 Pennsylvaniacities with an indexed median, Downingtown ranks #36from highest to lowest. Across all 139 state ZIP profiles, available estimates run from 43to 166.5 PPM.

Because only one ZIP is represented, the city median and range are the same local estimate. It should not be read as multiple independent samples across the community.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs
Moderately hard1 ZIP
Hard0 ZIPs
Very hard0 ZIPs

1 of 1 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
2.5 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: Jan 4, 2016 to Jun 10, 2026.

ZIP directory

Water reports in Downingtown

Open a ZIP for site-level provenance and measurements.

ZIP code

19335

Moderately Hard

82.8 PPM

Nearest site
2.5 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Downingtown Water Authority

PWSID PA1150026

Surface water
System population served
9,900
Last reported
Jun 15, 2026

A municipal system, in-state city, and served county all agree with this Census ZCTA.

Compliance history

What EPA records show

No active health-based violation appears among the associated systems in the represented EPA reporting quarter. This does not mean every contaminant was tested at every tap.

RecordSystemPeriodStatus
Interim Enhanced Surface Water Treatment RulePA1150026Sep 1, 2025Archived
TTHMPA1150026Jul 1, 2025Archived
1,2,4-TrichlorobenzenePA1150026Jan 1, 2023Resolved
cis-1,2-DichloroethylenePA1150026Jan 1, 2023Resolved
Xylenes, TotalPA1150026Jan 1, 2023Resolved
DICHLOROMETHANEPA1150026Jan 1, 2023Resolved
o-DichlorobenzenePA1150026Jan 1, 2023Resolved
1,1-DichloroethylenePA1150026Jan 1, 2023Resolved
trans-1,2-DichloroethylenePA1150026Jan 1, 2023Resolved
Carbon tetrachloridePA1150026Jan 1, 2023Resolved

Practical next steps

Move from index to evidence

  1. 1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
  2. 2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
  3. 3. Test the tap when needed. Confirm health concerns or treatment sizing with the right method.

Questions people ask

About water in Downingtown

Is the water hard?

The indexed city median is 83 PPM. Open the ZIP report to verify the distance and confidence behind that estimate.

Is the tap water safe?

Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.

Do I need treatment?

Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.