Utility-reported hardness
Unavailable
Ask your provider or test your tap
Local water dashboard
Official source aggregationWater quality in Durham, NC 27704
Regional hardness evidence, possible serving systems, EPA compliance history, and the measurements that are—and are not—available for Durham County.
Historical measurement record needs context
- Largest possible serving system
- Durham, City Of
- Source water
- Surface water + Groundwater
- County
- Durham 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
10 systems
Serves 333,490 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.
Durham, City Of
NC0332010 · Surface water · 333,490 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 (2)
| Rule | Status | Period |
|---|---|---|
| Revised Total Coliform Rule | Resolved | Feb 11, 2023 to Feb 14, 2023 |
| Consumer Confidence Rule | Resolved | Jul 1, 2021 to Oct 14, 2021 |
Hardscrabble S/d
NC0332139 · Groundwater · 643 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 (1)
| Rule | Status | Period |
|---|---|---|
| Consumer Confidence Rule | Resolved | Jul 1, 2024 to Jan 29, 2025 |
Greymoss S/d
NC0332111 · Groundwater · 361 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, 2026 to Jun 30, 2026
Copper (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- 1.694 mg/L
- Action level
- 1.3 mg/L
130% of the listed benchmark
Monitoring period: Jan 1, 2023 to Dec 31, 2023
Violation history (1)
| Rule | Status | Period |
|---|---|---|
| Consumer Confidence Rule | Resolved | Jul 1, 2024 to Dec 3, 2024 |
Willow Hill S/d
NC0332119 · Groundwater · 329 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
- 1.51 mg/L
- Action level
- 1.3 mg/L
116% of the listed benchmark
Monitoring period: Jul 1, 1993 to Dec 31, 1993
Violation history (1)
| Rule | Status | Period |
|---|---|---|
| Consumer Confidence Rule | Resolved | Jul 1, 2024 to Dec 17, 2024 |
Birchwood Mhp
NC0368105 · Groundwater · 312 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
- 0.003 mg/L
- Action level
- 0.015 mg/L
20% of the listed benchmark
Monitoring period: Jan 1, 2023 to Dec 31, 2025
Violation history (4)
| Rule | Status | Period |
|---|---|---|
| Revised Total Coliform Rule | Resolved | Jan 11, 2024 to Feb 6, 2024 |
| Revised Total Coliform Rule | Resolved | Feb 1, 2023 to Feb 28, 2023 |
| Lead and Copper Rule | Resolved | Jan 1, 2022 to Mar 31, 2022 |
| Consumer Confidence Rule | Resolved | Jul 1, 2021 to Nov 11, 2021 |
Whispering Pines Mhp
NC0332106 · Groundwater · 305 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, 2021
Violation history (104)
| Rule | Status | Period |
|---|---|---|
| Public Notice | Addressed | Feb 15, 2026 |
| Public Notice | Addressed | Feb 15, 2026 |
| Public Notice | Addressed | Feb 15, 2026 |
| Revised Total Coliform Rule | Resolved | Nov 1, 2025 to Nov 30, 2025 |
| Lead and Copper Rule | Addressed | Oct 1, 2025 |
| E. COLI | Resolved | Aug 6, 2025 to Dec 1, 2025 |
| Public Notice | Addressed | Jul 4, 2025 |
| Consumer Confidence Rule | Addressed | Jul 1, 2025 |
| Nitrate | Archived | Jan 1, 2025 to Dec 31, 2025 |
| Nitrate | Archived | Jan 1, 2025 to Dec 31, 2025 |
| Nitrate | Archived | Jan 1, 2025 to Dec 31, 2025 |
| LEAD AND COPPER RULE REVISIONSHealth-based | Resolved | Oct 17, 2024 to Mar 14, 2025 |
| LEAD AND COPPER RULE REVISIONS | Resolved | Oct 17, 2024 to Mar 14, 2025 |
| Consumer Confidence Rule | Addressed | Jul 1, 2024 |
| Revised Total Coliform Rule | Resolved | May 11, 2024 to May 15, 2024 |
| Arsenic | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| Cadmium | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| CYANIDE | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| Nickel | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| Antimony, Total | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| Beryllium, Total | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| Selenium | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| Arsenic | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| Barium | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| Cadmium | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| Chromium | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| CYANIDE | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| Mercury | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| Beryllium, Total | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| Selenium | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| Barium | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| Cadmium | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| CYANIDE | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| Nickel | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| Nitrate | Archived | Jan 1, 2024 to Dec 31, 2024 |
| Antimony, Total | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| Selenium | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| Thallium, Total | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| Chromium | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| Mercury | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| Fluoride | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| Thallium, Total | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| Fluoride | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| Beryllium, Total | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| Thallium, Total | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| Arsenic | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| Barium | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| Fluoride | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| Mercury | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| Chromium | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| Nitrate | Archived | Jan 1, 2024 to Dec 31, 2024 |
| Nitrate | Archived | Jan 1, 2024 to Dec 31, 2024 |
| Antimony, Total | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| Nickel | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| E. COLI | Addressed | Sep 6, 2023 |
| Revised Total Coliform Rule | Resolved | Aug 11, 2023 to Aug 14, 2023 |
| Consumer Confidence Rule | Addressed | Jul 1, 2023 |
| Arsenic | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Barium | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| CYANIDE | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Antimony, Total | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Thallium, Total | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Selenium | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Cadmium | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Beryllium, Total | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Thallium, Total | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Selenium | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Arsenic | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Chromium | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Fluoride | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Mercury | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Antimony, Total | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Beryllium, Total | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Selenium | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Cadmium | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Mercury | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Nickel | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Fluoride | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| CYANIDE | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Beryllium, Total | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Chromium | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| CYANIDE | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Barium | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Mercury | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Barium | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Thallium, Total | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Chromium | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Nickel | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Antimony, Total | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Fluoride | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Arsenic | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Nickel | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Cadmium | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Consumer Confidence Rule | Resolved | Jul 1, 2022 to Nov 9, 2022 |
| Public Notice | Resolved | Feb 10, 2022 to Jun 1, 2022 |
| Nitrate | Resolved | Jan 1, 2022 to Dec 31, 2022 |
| Nitrate | Resolved | Jan 1, 2022 to Dec 31, 2022 |
| Nitrate | Resolved | Jan 1, 2022 to Dec 31, 2022 |
| Lead and Copper Rule | Addressed | Jan 1, 2022 |
| Consumer Confidence Rule | Addressed | Jul 1, 2021 |
| Lead and Copper Rule | Addressed | Oct 1, 2020 |
| Lead and Copper Rule | Addressed | Oct 1, 2019 |
| Consumer Confidence Rule | Addressed | Jul 1, 2019 |
| Lead and Copper Rule | Addressed | Oct 1, 2007 |
Canterbury Estates
NC0332122 · Groundwater · 293 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
- 0.0027 mg/L
- Action level
- 0.015 mg/L
18% of the listed benchmark
Monitoring period: Jan 1, 2023 to Dec 31, 2025
Violation history (1)
| Rule | Status | Period |
|---|---|---|
| Consumer Confidence Rule | Resolved | Jul 1, 2024 to Dec 3, 2024 |
Fox Run S/d
NC0332116 · Groundwater · 272 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
- 0.006 mg/L
- Action level
- 0.015 mg/L
40% of the listed benchmark
Monitoring period: Jan 1, 2023 to Dec 31, 2025
Violation history (0)
No record returned in this imported window. This is not a guarantee of tap-water safety.
Heather Glen S/d
NC0332121 · Groundwater · 255 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 (1)
| Rule | Status | Period |
|---|---|---|
| Consumer Confidence Rule | Resolved | Jul 1, 2024 to Jan 2, 2025 |
Maple Ridge Mhp
NC0368122 · Groundwater · 216 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 (4)
| Rule | Status | Period |
|---|---|---|
| Chlorine | Resolved | Feb 1, 2026 to Feb 28, 2026 |
| Revised Total Coliform Rule | Resolved | Feb 1, 2026 to Feb 28, 2026 |
| Consumer Confidence Rule | Resolved | Jul 1, 2025 to Nov 10, 2025 |
| Lead and Copper Rule | Addressed | Jan 1, 2025 |
Hardness meter
What does nearby environmental evidence show?
40.7
PPM as CaCO₃
Soft
PPM
40.7
GPG
2.4
Regional environmental evidence
USGS hardness classification scale
40.7 PPM
Soft
0–60Moderate
61–120Hard
121–180Very hard
181+
0–60Moderate
61–120Hard
121–180Very hard
181+
Parts per million
40.7
mg/L as CaCO₃ equivalent
Grains per gallon
2.4
1 GPG ≈ 17.1 PPM
How to use regional evidence
These samples describe nearby environmental water. They cannot establish whether your tap water is soft or hard. Use a utility result or a tap test for appliance settings and treatment sizing.
USGS sites used
49
Nearest site
1.2 mi
Observation range
Jul 12, 2016–Jun 9, 2026
Regional evidence confidence
High
Median of the latest source-type-aligned hardness observation at each monitoring site within 25 miles. Nearest monitoring location: ELLERBE CREEK NEAR GORMAN, NC (Stream).USGS source documentation ↗Evidence tier: Regional environmental evidence. This value is not used as proof of the serving utility's treated-water hardness.
Regional context
Is 27704 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Durham median
41 PPM
About the same10 indexed ZIP readings · Range 40.5–55.4 PPM
North Carolina median
45 PPM
About the same247 indexed ZIP readings · Range 3.1–269 PPM
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
Use a tap hardness test before sizing a softener. For health concerns, use a certified laboratory and the correct sampling protocol.
Convert your hardness test result →Nearby indexed reports
More local profiles in Durham
Estimates can differ across a city because monitoring locations and associated systems differ.
Frequently asked
Water questions for Durham
Is tap water safe in Durham?+
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.