Utility-reported hardness
Unavailable
Ask your provider or test your tap
Local water dashboard
Official source aggregationWater quality in South Bend, IN 46637
Regional hardness evidence, possible serving systems, EPA compliance history, and the measurements that are—and are not—available for St. Joseph County.
1 active health-based record(s) across possible systems
- Largest possible serving system
- South Bend Water Works
- Source water
- Groundwater
- County
- St. Joseph 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
3 systems
Serves 115,000 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.
South Bend Water Works
IN5271014 · Groundwater · 115,000 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
- 0.0047 mg/L
- Action level
- 0.015 mg/L
31% of the listed benchmark
Monitoring period: Jan 1, 2023 to Dec 31, 2025
Violation history (1)
| Rule | Status | Period |
|---|---|---|
| Revised Total Coliform Rule | Resolved | Nov 1, 2025 to Nov 30, 2025 |
Clearwater Village Mobile Home Park
IN5271012 · Groundwater · 400 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 |
|---|---|---|
| Lead and Copper Rule | Resolved | Jan 1, 2023 to Feb 16, 2023 |
| Revised Total Coliform Rule | Resolved | Jan 11, 2022 to Jan 25, 2022 |
| TTHM | Resolved | Jan 1, 2021 to Dec 31, 2021 |
| Total Haloacetic Acids (HAA5) | Resolved | Jan 1, 2021 to Dec 31, 2021 |
Sunset Village & Rv Park
IN5271016 · Groundwater · 25 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 (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, 2025 to Dec 31, 2025
Violation history (48)
| Rule | Status | Period |
|---|---|---|
| Revised Total Coliform Rule | Archived | Feb 1, 2026 to Feb 28, 2026 |
| Revised Total Coliform Rule | Archived | Jan 1, 2026 to Jan 31, 2026 |
| Lead and Copper Rule | Unaddressed | Jan 1, 2026 |
| Public Notice | Unaddressed | Dec 2, 2025 |
| Revised Total Coliform Rule | Archived | Dec 1, 2025 to Dec 31, 2025 |
| Consumer Confidence Rule | Unaddressed | Oct 1, 2025 |
| Consumer Confidence Rule | Unaddressed | Jul 1, 2025 |
| Revised Total Coliform Rule | Resolved | Jul 1, 2025 to Jul 31, 2025 |
| Gross Alpha, Excl. Radon and U | Resolved | Apr 1, 2025 to Jun 30, 2025 |
| Radium-226 | Resolved | Apr 1, 2025 to Jun 30, 2025 |
| Radium-228 | Resolved | Apr 1, 2025 to Jun 30, 2025 |
| Endrin | Archived | Jan 1, 2025 to Dec 31, 2025 |
| Toxaphene | Archived | Jan 1, 2025 to Dec 31, 2025 |
| Diquat | Archived | Jan 1, 2025 to Dec 31, 2025 |
| Endothall | Archived | Jan 1, 2025 to Dec 31, 2025 |
| Dinoseb | Archived | Jan 1, 2025 to Dec 31, 2025 |
| Carbofuran | Archived | Jan 1, 2025 to Dec 31, 2025 |
| Atrazine | Archived | Jan 1, 2025 to Dec 31, 2025 |
| LASSO | Archived | Jan 1, 2025 to Dec 31, 2025 |
| Heptachlor | Archived | Jan 1, 2025 to Dec 31, 2025 |
| Heptachlor epoxide | Archived | Jan 1, 2025 to Dec 31, 2025 |
| 2,4-D | Archived | Jan 1, 2025 to Dec 31, 2025 |
| 2,4,5-TP | Archived | Jan 1, 2025 to Dec 31, 2025 |
| Benzo(a)pyrene | Archived | Jan 1, 2025 to Dec 31, 2025 |
| Pentachlorophenol | Archived | Jan 1, 2025 to Dec 31, 2025 |
| 1,2-DIBROMO-3-CHLOROPROPANE | Archived | Jan 1, 2025 to Dec 31, 2025 |
| Chlordane | Archived | Jan 1, 2025 to Dec 31, 2025 |
| Public Notice | Unaddressed | Jan 1, 2025 |
| Di(2-ethylhexyl) adipate | Archived | Jan 1, 2025 to Dec 31, 2025 |
| Picloram | Archived | Jan 1, 2025 to Dec 31, 2025 |
| Dalapon | Archived | Jan 1, 2025 to Dec 31, 2025 |
| ETHYLENE DIBROMIDE | Archived | Jan 1, 2025 to Dec 31, 2025 |
| Methoxychlor | Archived | Jan 1, 2025 to Dec 31, 2025 |
| Glyphosate | Archived | Jan 1, 2025 to Dec 31, 2025 |
| BHC-GAMMA | Archived | Jan 1, 2025 to Dec 31, 2025 |
| Simazine | Archived | Jan 1, 2025 to Dec 31, 2025 |
| Di(2-ethylhexyl) phthalate | Archived | Jan 1, 2025 to Dec 31, 2025 |
| Hexachlorocyclopentadiene | Archived | Jan 1, 2025 to Dec 31, 2025 |
| HEXACHLOROBENZENE | Archived | Jan 1, 2025 to Dec 31, 2025 |
| OXAMYL | Archived | Jan 1, 2025 to Dec 31, 2025 |
| LEAD AND COPPER RULE REVISIONSHealth-based | Unaddressed | Oct 17, 2024 |
| LEAD AND COPPER RULE REVISIONS | Unaddressed | Oct 17, 2024 |
| Consumer Confidence Rule | Unaddressed | Oct 10, 2024 |
| Consumer Confidence Rule | Unaddressed | Jul 1, 2024 |
| Lead and Copper Rule | Resolved | Jan 1, 2023 to Jun 9, 2025 |
| Consumer Confidence Rule | Resolved | Oct 1, 2022 to Nov 6, 2023 |
| Consumer Confidence Rule | Resolved | Jul 1, 2022 to Jul 12, 2023 |
| Lead and Copper RuleHealth-based | Resolved | Nov 22, 2021 to Sep 27, 2022 |
Hardness meter
What does nearby environmental evidence show?
359.5
PPM as CaCO₃
Very Hard
PPM
359.5
GPG
21
Regional environmental evidence
USGS hardness classification scale
359.5 PPM
Soft
0–60Moderate
61–120Hard
121–180Very hard
181+
0–60Moderate
61–120Hard
121–180Very hard
181+
Parts per million
359.5
mg/L as CaCO₃ equivalent
Grains per gallon
21
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
2
Nearest site
21.2 mi
Observation range
Apr 11, 2022–Apr 11, 2022
Regional evidence confidence
Moderate
Median of the latest source-type-aligned hardness observation at each monitoring site within 25 miles. Nearest monitoring location: Shavehead Lake Fen piezometer 1b - Cass County, MI (Well).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 46637 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
South Bend median
360 PPM
About the same6 indexed ZIP readings · Range 359.5–380 PPM
Indiana median
340 PPM
20 PPM higher290 indexed ZIP readings · Range 78.6–498 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
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
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 South Bend
Estimates can differ across a city because monitoring locations and associated systems differ.
Frequently asked
Water questions for South Bend
Is tap water safe in South Bend?+
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.