Utility-reported hardness
Unavailable
Ask your provider or test your tap
Local water dashboard
Official source aggregationWater quality in Mills, WY 82644
Regional hardness evidence, possible serving systems, EPA compliance history, and the measurements that are—and are not—available for Natrona County.
Historical measurement record needs context
- Largest possible serving system
- Mills, City Of
- Source water
- Groundwater influenced by surface water + Surface water + Groundwater
- County
- Natrona 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
No active flag
0 active health-based records
Measurements by utility
Each result belongs to a specific system.
Utility match
9 systems
Serves 4,050 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.
Mills, City Of
WY5600036 · Groundwater influenced by surface water · 4,050 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 (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 mg/L
- Action level
- 0.015 mg/L
0% of the listed benchmark
Monitoring period: Jan 1, 2023 to Dec 31, 2025
TTHM
EPA SDWIS reported health-based violation
- Reported level
- 0.081 MG/L
- Maximum contaminant level
- 0.08 MG/L
101% of the listed benchmark
Monitoring period: Jan 1, 2025 to Mar 31, 2025
Violation history (3)
| Rule | Status | Period |
|---|---|---|
| TTHMHealth-based | Resolved | Jan 1, 2025 to Mar 31, 2025 |
| TTHMHealth-based | Resolved | Oct 1, 2024 to Dec 31, 2024 |
| TTHMHealth-based | Resolved | Jul 1, 2024 to Sep 30, 2024 |
Bar Nunn, Town Of
WY5600067 · Surface water · 4,000 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
- 0.001 mg/L
- Action level
- 0.015 mg/L
7% of the listed benchmark
Monitoring period: Jan 1, 2021 to Dec 31, 2023
Violation history (0)
No record returned in this imported window. This is not a guarantee of tap-water safety.
Pioneer Water & Sewer District
WY5600828 · Surface water · 1,500 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 (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
- 0.002 mg/L
- Action level
- 0.015 mg/L
13% of the listed benchmark
Monitoring period: Jan 1, 2023 to Dec 31, 2025
Copper (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- 1.4 mg/L
- Action level
- 1.3 mg/L
108% of the listed benchmark
Monitoring period: Jan 1, 2008 to Dec 31, 2010
Violation history (4)
| Rule | Status | Period |
|---|---|---|
| Surface Water Treatment Rule | Resolved | Nov 1, 2024 to Nov 30, 2024 |
| Revised Total Coliform Rule | Resolved | Nov 1, 2024 to Nov 30, 2024 |
| Surface Water Treatment Rule | Resolved | Apr 1, 2022 to Apr 30, 2022 |
| Consumer Confidence Rule | Addressed | Oct 1, 2020 |
Air Base Acres I&s District
WY5600080 · Surface water · 236 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 (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 mg/L
- Action level
- 0.015 mg/L
0% of the listed benchmark
Monitoring period: Jan 1, 2023 to Dec 31, 2025
Copper (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- 1.71 mg/L
- Action level
- 1.3 mg/L
132% of the listed benchmark
Monitoring period: Jul 1, 1993 to Dec 31, 1993
Violation history (1)
| Rule | Status | Period |
|---|---|---|
| Revised Total Coliform Rule | Resolved | Aug 1, 2021 to Aug 31, 2021 |
Poison Spider I&s District
WY5600073 · Surface water · 200 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, 2021 to Dec 31, 2023
Violation history (0)
No record returned in this imported window. This is not a guarantee of tap-water safety.
Pleasant View Water Company
WY5600082 · Surface water · 130 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
- 0.001 mg/L
- Action level
- 0.015 mg/L
7% 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.
Countryside Court
WY5600756 · Groundwater · 125 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 (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
- 0.001 mg/L
- Action level
- 0.015 mg/L
7% of the listed benchmark
Monitoring period: Jul 1, 2023 to Dec 31, 2023
Copper (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- 2.04 mg/L
- Action level
- 1.3 mg/L
157% of the listed benchmark
Monitoring period: Jan 1, 2018 to Dec 31, 2020
Violation history (9)
| Rule | Status | Period |
|---|---|---|
| Revised Total Coliform Rule | Resolved | Nov 1, 2025 to Nov 30, 2025 |
| LEAD AND COPPER RULE REVISIONS | Resolved | Oct 17, 2024 to Jul 2, 2025 |
| LEAD AND COPPER RULE REVISIONSHealth-based | Resolved | Oct 17, 2024 to Nov 21, 2025 |
| Consumer Confidence Rule | Unaddressed | Jul 1, 2024 |
| Consumer Confidence Rule | Resolved | Jul 1, 2023 to Nov 6, 2023 |
| Consumer Confidence Rule | Resolved | Oct 1, 2022 to Dec 19, 2022 |
| Consumer Confidence Rule | Resolved | Jul 1, 2022 to Dec 19, 2022 |
| Lead and Copper Rule | Resolved | Dec 30, 2021 to Nov 6, 2023 |
| Lead and Copper Rule | Addressed | Dec 30, 2020 |
Thirty-Three Mile Road I&s District
WY5601579 · Surface water · 100 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
- 0.001 mg/L
- Action level
- 0.015 mg/L
7% of the listed benchmark
Monitoring period: Jan 1, 2022 to Dec 31, 2024
Violation history (2)
| Rule | Status | Period |
|---|---|---|
| Consumer Confidence Rule | Unaddressed | Jul 1, 2025 |
| Lead and Copper Rule | Resolved | Dec 30, 2024 to Feb 20, 2025 |
Lakeview I&s District
WY5601494 · Surface water · 62 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
- 0.002 mg/L
- Action level
- 0.015 mg/L
13% of the listed benchmark
Monitoring period: Jan 1, 2023 to Dec 31, 2025
Violation history (4)
| Rule | Status | Period |
|---|---|---|
| Consumer Confidence Rule | Unaddressed | Jul 1, 2025 |
| Consumer Confidence Rule | Unaddressed | Jul 1, 2018 |
| Consumer Confidence Rule | Unaddressed | Jul 1, 2016 |
| Consumer Confidence Rule | Unaddressed | Jul 1, 2015 |
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
A reported action-level record needs context. Check its monitoring period and the utility's current report.
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 →Frequently asked
Water questions for Mills
Is tap water safe in Mills?+
EPA ECHO shows no active health-based violation for the associated systems in this reporting snapshot. This does not prove every contaminant is absent; federal records can lag and household plumbing can change tap conditions.
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.