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City water profile

Douglas water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Douglas, Arizona.

Median indexed hardness

245PPM

2 indexed ZIPs

Range 245–245 PPM

State comparison
4 PPM above
State hardness rank
#64 of 133
Matched utilities
5
Active health records
0

City summary

What the indexed records say

Douglas has 2 published ZIP profiles across Cochise County. The indexed median is 245 PPM, compared with 241 PPM across Arizona.

Among the 133 Arizonacities with an indexed median, Douglas ranks #64from highest to lowest. Across all 285 state ZIP profiles, available estimates run from 66.4to 1250 PPM.

The 245–245 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 hard0 ZIPs
Hard0 ZIPs
Very hard2 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
53.7 miles
Profiles with evidence
2/2

Confidence labels

High: 0Moderate: 0Low: 2

Observation window: Jan 21, 2020 to Mar 31, 2026.

ZIP directory

Water reports in Douglas

Open a ZIP for site-level provenance and measurements.

ZIP code

85607

Very Hard

245 PPM

Nearest site
53.7 mi
Confidence
Low

View full ZIP evidence →

ZIP code

85608

Very Hard

245 PPM

Nearest site
39.1 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

Douglas City Of

PWSID AZ0402014

Groundwater
System population served
16,656
Last reported
May 14, 2026

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

Monte Vista Water Company

PWSID AZ0402043

Groundwater
System population served
150
Last reported
May 14, 2026

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

Cochise College Park Water Assoc

PWSID AZ0402040

Groundwater
System population served
83
Last reported
May 14, 2026

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

Twin Buttes Rv, Llc

PWSID AZ0402360

Groundwater
System population served
79
Last reported
May 14, 2026

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

La Costa Water Users Assoc

PWSID AZ0402041

Groundwater
System population served
30
Last reported
May 14, 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 RuleAZ0402043Jan 1, 2026Resolved
Lead and Copper RuleAZ0402360Jan 1, 2026Resolved
Public NoticeAZ0402360Oct 17, 2025Resolved
Consumer Confidence RuleAZ0402014Oct 2, 2025Resolved
Consumer Confidence RuleAZ0402360Oct 2, 2025Unaddressed
Consumer Confidence RuleAZ0402041Oct 2, 2025Unaddressed
Consumer Confidence RuleAZ0402360Jul 1, 2025Unaddressed
Consumer Confidence RuleAZ0402041Jul 1, 2025Unaddressed
Public NoticeAZ0402043Dec 20, 2024Resolved
Public NoticeAZ0402360Dec 20, 2024Unaddressed

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 Douglas

Is the water hard?

The indexed city median is 245 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.