Utility-reported hardness
Unavailable
Ask your provider or test your tap
Local water dashboard
Official source aggregationWater quality in Topeka, KS 66621
Regional hardness evidence, possible serving systems, EPA compliance history, and the measurements that are—and are not—available for Shawnee County.
Historical measurement record needs context
- Largest possible serving system
- Topeka, City Of
- Source water
- Surface water
- County
- Shawnee 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
5 systems
Serves 125,963 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.
Topeka, City Of
KS2017701 · Surface water · 125,963 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
- 0.0024 mg/L
- Action level
- 0.015 mg/L
16% of the listed benchmark
Monitoring period: Jan 1, 2021 to Dec 31, 2023
Violation history (2)
| Rule | Status | Period |
|---|---|---|
| Surface Water Treatment Rule | Resolved | Mar 1, 2022 to Mar 31, 2022 |
| Surface Water Treatment Rule | Resolved | Aug 1, 2021 to Aug 31, 2021 |
Shawnee Co Rwd 4c
KS2017718 · Surface water · 12,000 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
- 0.0021 mg/L
- Action level
- 0.015 mg/L
14% 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.
Shawnee Co Rwd 3c
KS2017717 · Surface water · 2,675 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, 2021 to Dec 31, 2023
Total Haloacetic Acids (HAA5)
EPA SDWIS reported health-based violation
- Reported level
- 0.073 MG/L
- Maximum contaminant level
- 0.06 MG/L
122% of the listed benchmark
Monitoring period: Apr 1, 2025 to Jun 30, 2025
Violation history (8)
| Rule | Status | Period |
|---|---|---|
| LEAD AND COPPER RULE REVISIONS | Unaddressed | Jul 2, 2025 |
| Total Haloacetic Acids (HAA5)Health-based | Resolved | Apr 1, 2025 to Jun 30, 2025 |
| Total Haloacetic Acids (HAA5)Health-based | Resolved | Jan 1, 2025 to Mar 31, 2025 |
| Total Haloacetic Acids (HAA5)Health-based | Resolved | Oct 1, 2024 to Dec 31, 2024 |
| Total Haloacetic Acids (HAA5)Health-based | Resolved | Jul 1, 2024 to Sep 30, 2024 |
| Total Haloacetic Acids (HAA5)Health-based | Resolved | Apr 1, 2024 to Jun 30, 2024 |
| Total Haloacetic Acids (HAA5) | Resolved | May 1, 2022 to Jul 31, 2022 |
| TTHM | Resolved | May 1, 2022 to Jul 31, 2022 |
Shawnee Co Rwd 2c
KS2017713 · Surface water · 700 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
- 0.0029 mg/L
- Action level
- 0.015 mg/L
19% of the listed benchmark
Monitoring period: Jul 1, 2025 to Dec 31, 2025
Copper (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- 1.6 mg/L
- Action level
- 1.3 mg/L
123% of the listed benchmark
Monitoring period: Jul 1, 2025 to Dec 31, 2025
Violation history (3)
| Rule | Status | Period |
|---|---|---|
| LEAD AND COPPER RULE REVISIONS | Unaddressed | Jul 2, 2025 |
| Lead and Copper Rule | Resolved | Sep 29, 2021 to Dec 17, 2021 |
| Lead and Copper Rule | Resolved | Apr 1, 2021 to Dec 17, 2021 |
Metro Topeka Airport Authority
KS2117703 · Surface water · 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 mg/L
- Action level
- 0.015 mg/L
0% of the listed benchmark
Monitoring period: Jan 1, 2023 to Dec 31, 2023
Total Haloacetic Acids (HAA5)
EPA SDWIS reported health-based violation
- Reported level
- 0.074 MG/L
- Maximum contaminant level
- 0.06 MG/L
123% of the listed benchmark
Monitoring period: Jan 1, 2025 to Mar 31, 2025
Violation history (13)
| Rule | Status | Period |
|---|---|---|
| Total Haloacetic Acids (HAA5) | Archived | Oct 1, 2025 to Dec 31, 2025 |
| TTHM | Archived | Oct 1, 2025 to Dec 31, 2025 |
| Total Haloacetic Acids (HAA5)Health-based | Resolved | Jan 1, 2025 to Mar 31, 2025 |
| Total Haloacetic Acids (HAA5)Health-based | Resolved | Oct 1, 2024 to Dec 31, 2024 |
| Total Haloacetic Acids (HAA5)Health-based | Resolved | Jul 1, 2024 to Sep 30, 2024 |
| Total Haloacetic Acids (HAA5)Health-based | Resolved | Apr 1, 2024 to Jun 30, 2024 |
| Total Haloacetic Acids (HAA5)Health-based | Resolved | Jan 1, 2024 to Mar 31, 2024 |
| Lead and Copper Rule | Resolved | Oct 31, 2022 to Aug 1, 2023 |
| Total Haloacetic Acids (HAA5) | Resolved | Jul 1, 2022 to Mar 8, 2023 |
| Lead and Copper Rule | Resolved | Jan 31, 2022 to Aug 1, 2023 |
| Lead and Copper Rule | Unaddressed | Jul 31, 2019 |
| Lead and Copper Rule | Unaddressed | Jan 31, 2019 |
| Lead and Copper Rule | Unaddressed | Dec 30, 2017 |
Hardness meter
What does nearby environmental evidence show?
220.5
PPM as CaCO₃
Very Hard
PPM
220.5
GPG
12.9
Regional environmental evidence
USGS hardness classification scale
220.5 PPM
Soft
0–60Moderate
61–120Hard
121–180Very hard
181+
0–60Moderate
61–120Hard
121–180Very hard
181+
Parts per million
220.5
mg/L as CaCO₃ equivalent
Grains per gallon
12.9
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
4
Nearest site
2.8 mi
Observation range
May 12, 2026–Jun 9, 2026
Regional evidence confidence
Moderate
Median of the latest source-type-aligned hardness observation at each monitoring site within 25 miles. Nearest monitoring location: KANSAS R AB TOPEKA WEIR AT TOPEKA, KS (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 66621 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Topeka median
221 PPM
About the same19 indexed ZIP readings · Range 220.5–245 PPM
Kansas median
291 PPM
70 PPM lower303 indexed ZIP readings · Range 70.9–796 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 Topeka
Estimates can differ across a city because monitoring locations and associated systems differ.
Frequently asked
Water questions for Topeka
Is tap water safe in Topeka?+
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.