Utility-reported hardness
Unavailable
Ask your provider or test your tap
Local water dashboard
Official source aggregationWater quality in Douglas, AZ 85608
Regional hardness evidence, possible serving systems, EPA compliance history, and the measurements that are—and are not—available for Cochise County.
1 active health-based record(s) across possible systems
- Largest possible serving system
- Douglas City Of
- Source water
- Groundwater
- County
- Cochise County
- Profile updated
Your tap water
What does the utility report?
Match the utility name to your water bill. These results describe the utility’s water, not a test at your home. A ZIP can include several water systems.
Utility hardness unavailable in this index
Nearby river or groundwater samples cannot tell us the hardness coming out of your tap. Ask your water provider for total hardness as CaCO₃, or test it at home.
Find an official utility report →At a glance
What the current records say
EPA quarter 2026Q2
All possible systems
Review needed
1 active health-based record
Measurements by utility
Each result belongs to a specific system.
Utility match
5 systems
Serves 16,656 people system-wide
Match the name on your water bill
Your utility’s measurements and compliance records
These are possible serving systems. A record for one system does not apply to every home in this ZIP. Confirm your provider before interpreting a measurement or notice. Federal records can lag current utility notices.
EPA snapshot: 2026Q2. Historical window begins Jan 1, 2021.
Douglas City Of
AZ0402014 · Groundwater · 16,656 people served system-wide
The system names this served city; Census place overlap links the city to this ZCTA.
No active health-based record in this imported snapshot
Find this utility’s official report →Measurements (1)
An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.
Lead (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- 0 mg/L
- Action level
- 0.015 mg/L
0% of the listed benchmark
Monitoring period: Jan 1, 2023 to Dec 31, 2025
Violation history (5)
| Rule | Status | Period |
|---|---|---|
| Consumer Confidence Rule | Resolved | Oct 2, 2025 to Dec 17, 2025 |
| Chlorine | Resolved | Jan 1, 2024 to Jan 31, 2024 |
| Lead and Copper Rule | Resolved | Jan 1, 2023 to Feb 16, 2023 |
| Chlorine | Resolved | Apr 1, 2022 to Jun 30, 2022 |
| Chlorine | Resolved | Jan 1, 2022 to Mar 31, 2022 |
Monte Vista Water Company
AZ0402043 · Groundwater · 150 people served system-wide
The system names this served city; Census place overlap links the city to this ZCTA.
1 reported active health-based record(s) for this system
Find this utility’s official report →Measurements (2)
An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.
Lead (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- 0.0046 mg/L
- Action level
- 0.015 mg/L
31% of the listed benchmark
Monitoring period: Jan 1, 2023 to Dec 31, 2025
Arsenic
EPA SDWIS reported health-based violation
- Reported level
- 0.011 MG/L
- Maximum contaminant level
- 0.01 MG/L
110% of the listed benchmark
Monitoring period: Jan 1, 2024 to Mar 31, 2024
Violation history (11)
| Rule | Status | Period |
|---|---|---|
| Lead and Copper Rule | Resolved | Jan 1, 2026 to Mar 19, 2026 |
| Public Notice | Resolved | Dec 20, 2024 to Jan 3, 2025 |
| LEAD AND COPPER RULE REVISIONSHealth-based | Resolved | Oct 17, 2024 to Dec 24, 2025 |
| LEAD AND COPPER RULE REVISIONS | Resolved | Oct 17, 2024 to Dec 24, 2025 |
| Consumer Confidence Rule | Resolved | Oct 2, 2024 to Dec 20, 2024 |
| Public Notice | Resolved | Apr 5, 2024 to Dec 20, 2024 |
| Public Notice | Resolved | Jan 18, 2024 to Dec 20, 2024 |
| ArsenicHealth-based | Resolved | Jan 1, 2024 to Mar 31, 2024 |
| Consumer Confidence Rule | Resolved | Oct 2, 2023 to Oct 31, 2023 |
| ArsenicHealth-based | Resolved | Oct 1, 2023 to Dec 31, 2023 |
| Groundwater RuleHealth-based | Unaddressed | Aug 15, 2018 |
Cochise College Park Water Assoc
AZ0402040 · Groundwater · 83 people served system-wide
The system names this served city; Census place overlap links the city to this ZCTA.
No active health-based record in this imported snapshot
Find this utility’s official report →Measurements (1)
An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.
Lead (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- 0 mg/L
- Action level
- 0.015 mg/L
0% of the listed benchmark
Monitoring period: Jan 1, 2022 to Dec 31, 2024
Violation history (0)
No record returned in this imported window. This is not a guarantee of tap-water safety.
Twin Buttes Rv, Llc
AZ0402360 · Groundwater · 79 people served system-wide
The system names this served city; Census place overlap links the city to this ZCTA.
No active health-based record in this imported snapshot
Find this utility’s official report →Measurements (1)
An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.
Lead (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- 0.015 mg/L
- Action level
- 0.015 mg/L
100% of the listed benchmark
Monitoring period: Jan 1, 2023 to Dec 31, 2025
Violation history (10)
| Rule | Status | Period |
|---|---|---|
| Lead and Copper Rule | Resolved | Jan 1, 2026 to Mar 19, 2026 |
| Public Notice | Resolved | Oct 17, 2025 to Nov 24, 2025 |
| Consumer Confidence Rule | Unaddressed | Oct 2, 2025 |
| Consumer Confidence Rule | Unaddressed | Jul 1, 2025 |
| Public Notice | Unaddressed | Dec 20, 2024 |
| LEAD AND COPPER RULE REVISIONS | Resolved | Oct 17, 2024 to Feb 27, 2026 |
| LEAD AND COPPER RULE REVISIONSHealth-based | Resolved | Oct 17, 2024 to Feb 27, 2026 |
| Revised Total Coliform RuleHealth-based | Resolved | Dec 24, 2022 to Mar 13, 2023 |
| Consumer Confidence Rule | Resolved | Oct 2, 2022 to Aug 29, 2023 |
| Consumer Confidence Rule | Resolved | Jul 1, 2022 to Aug 29, 2023 |
La Costa Water Users Assoc
AZ0402041 · Groundwater · 30 people served system-wide
The system names this served city; Census place overlap links the city to this ZCTA.
No active health-based record in this imported snapshot
Find this utility’s official report →Measurements (1)
An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.
Lead (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- 0.007 mg/L
- Action level
- 0.015 mg/L
47% of the listed benchmark
Monitoring period: Jan 1, 2021 to Dec 31, 2023
Violation history (12)
| Rule | Status | Period |
|---|---|---|
| Consumer Confidence Rule | Unaddressed | Oct 2, 2025 |
| Consumer Confidence Rule | Unaddressed | Jul 1, 2025 |
| Consumer Confidence Rule | Resolved | Oct 2, 2024 to Oct 22, 2024 |
| Groundwater RuleHealth-based | Resolved | Oct 14, 2023 to Jan 28, 2024 |
| Consumer Confidence Rule | Resolved | Jul 1, 2023 to Oct 6, 2023 |
| Revised Total Coliform RuleHealth-based | Resolved | Nov 8, 2022 to Jan 24, 2023 |
| E. COLI | Unaddressed | Oct 21, 2022 |
| Consumer Confidence Rule | Resolved | Oct 2, 2022 to Sep 14, 2023 |
| Consumer Confidence Rule | Resolved | Jul 1, 2022 to Sep 14, 2023 |
| E. COLI | Resolved | Jun 3, 2021 to Jun 8, 2021 |
| Public Notice | Resolved | Feb 26, 2021 to Jul 26, 2022 |
| Lead and Copper Rule | Resolved | Jan 1, 2021 to Oct 22, 2021 |
Hardness estimate unavailable
No responsible local estimate yet
We did not find enough qualifying recent USGS hardness observations within 25 miles of this ZIP centroid. We leave the value blank instead of substituting a state average. Ask the serving utility or test the household tap for a property-specific result.
Evidence-first next steps
Confirm the problem before choosing treatment
This profile can help you ask the right question. It cannot select equipment for a property without a current result from the serving utility or the tap.
Confirm the serving system
ZIP boundaries and utility service areas do not perfectly match. Verify the system on a water bill before relying on system-wide records.
Read the current utility report
An active health-based record is present. Follow the utility's current notice and public-health instructions.
Find an official utility report →Test for the decision you face
Ask the utility for hardness or test at the tap. For health concerns, use a certified laboratory and targeted analysis.
Convert your hardness test result →Nearby indexed reports
More local profiles in Douglas
Estimates can differ across a city because monitoring locations and associated systems differ.
Frequently asked
Water questions for Douglas
Is tap water safe in Douglas?+
EPA ECHO reports 1 active health-based violation among the associated community water systems. Review the affected utility's current notice and Consumer Confidence Report.
How hard is the water?+
Utility-reported hardness is unavailable in this index. Regional samples do not establish tap-water hardness. Ask your provider or test your tap.
Do I need a water softener?+
Confirm hardness at your tap and consider actual scale or spotting before choosing treatment. Regional environmental values cannot determine whether you need a softener. A softener addresses hardness, not every contaminant.