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City water profile

Orono water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Orono, Maine.

Median indexed hardness

76PPM

2 indexed ZIPs

Range 76.1–76.1 PPM

State comparison
37 PPM above
State hardness rank
#26 of 110
Matched utilities
4
Active health records
0

City summary

What the indexed records say

Orono has 2 published ZIP profiles across Penobscot County. The indexed median is 76 PPM, compared with 39 PPM across Maine.

Among the 110 Mainecities with an indexed median, Orono ranks #26from highest to lowest. Across all 131 state ZIP profiles, available estimates run from 3.2to 94.5 PPM.

The 76.1–76.1 PPM range shows how much the available ZIP estimates vary within the city label. At least one estimate is marked low confidence, so observation distance and date deserve extra attention.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs
Moderately hard2 ZIPs
Hard0 ZIPs
Very hard0 ZIPs

2 of 2 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
31.5 miles
Profiles with evidence
2/2

Confidence labels

High: 0Moderate: 0Low: 2

Observation window: Sep 24, 2019 to Oct 11, 2023.

ZIP directory

Water reports in Orono

Open a ZIP for site-level provenance and measurements.

ZIP code

04469

Moderately Hard

76.1 PPM

Nearest site
29.4 mi
Confidence
Low

View full ZIP evidence →

ZIP code

04473

Moderately Hard

76.1 PPM

Nearest site
31.5 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

Orono-Veazie Water District

PWSID ME0091210

Groundwater
System population served
5,793
Last reported
May 13, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Havasu Pines Mhp

PWSID ME0105637

Groundwater
System population served
75
Last reported
May 13, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Stillwater Mobile Home Park

PWSID ME0005645

Groundwater
System population served
70
Last reported
May 13, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Havasu Pines Mhp #1

PWSID ME0005637

Groundwater
System population served
65
Last reported
May 13, 2026

The system names this served city; Census place overlap links the city to this 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
Lead and Copper RuleME0091210Dec 30, 2025Resolved
Consumer Confidence RuleME0105637Jul 1, 2024Resolved
Consumer Confidence RuleME0005637Jul 1, 2024Resolved
Consumer Confidence RuleME0105637Jul 1, 2015Unaddressed
Consumer Confidence RuleME0005645Jul 1, 2007Unaddressed
Consumer Confidence RuleME0005645Jul 1, 2006Unaddressed
Consumer Confidence RuleME0005637Oct 1, 2005Unaddressed
Consumer Confidence RuleME0005637Oct 1, 2004Unaddressed

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 Orono

Is the water hard?

The indexed city median is 76 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.