Hardness
Very Hard
310 PPM · 18.1 GPG
Local water dashboard
Official source aggregationWater quality in Washington, IL 61571
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Tazewell County.
1 active health-based violation
- Primary matched system
- Washington
- Source water
- Groundwater
- County
- Tazewell County
- Profile updated
At a glance
What the current records say
EPA quarter 2026Q2
Compliance screen
Review needed
1 active health-based record
Lead 90th percentile
0 mg/L
0% of action level
Utility match
3 systems
Serves 14,793 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
310 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
310
mg/L as CaCO₃ equivalent
Grains per gallon
18.1
1 GPG ≈ 17.1 PPM
What this means at home
At 310 PPM, mineral scale can build up on fixtures and heating elements, reduce soap lather, and leave visible spotting. Hardness is primarily an aesthetic and appliance concern—not itself a tap-water safety rating.
USGS sites used
40
Nearest site
23 mi
Observation range
May 22, 2017–Jul 30, 2025
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: 11N 6E-24.1e1 (Well).USGS source documentation ↗
Regional context
Is 61571 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Washington median
310 PPM
About the same1 indexed ZIP readings · Range 310–310 PPM
Illinois median
285 PPM
25 PPM higher1065 indexed ZIP readings · Range 115–408 PPM
EPA benchmark screen
Contaminant snapshot
Available numerical results from associated SDWIS community water systems, compared with the applicable action level or federal MCL. Federal measured-value coverage is incomplete.
1 pass1 fail
Lead (PB90)
0 mg/L
Reported Jun 30, 2026
Copper (CU90)
1.65 mg/L
Reported Jun 30, 2026
Numerical coverage
2 comparable results
Missing values remain blank; absence is not treated as a pass.
Lead (90th percentile)
Measured in mg/L
Local 0
EPA limit 0.015
Copper (90th percentile)
Measured in mg/L
Local 1.65
EPA limit 1.3
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 11
- Health-based
- 2
- Active health-based
- 1
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Public Notice | IL1795450 | Resolved | Jul 12, 2025through Jan 2, 2026 |
| Consumer Confidence Rule | IL1790750 | Resolved | Jul 1, 2025through Sep 5, 2025 |
| Consumer Confidence Rule | IL1795450 | Unaddressed | Jul 1, 2025 |
| Consumer Confidence Rule | IL1795450 | Unaddressed | Jul 1, 2024 |
| Lead and Copper Rule | IL1795450 | Unaddressed | Jul 1, 2024 |
| Consumer Confidence Rule | IL1795450 | Resolved | Jul 1, 2024through Jul 15, 2024 |
| Consumer Confidence Rule | IL1795450 | Resolved | Dec 4, 2023through Jul 15, 2024 |
| Lead and Copper RuleHealth-based | IL1795450 | Resolved | Apr 2, 2023through Jun 7, 2024 |
| Lead and Copper RuleHealth-based | IL1795450 | Unaddressed | Mar 1, 2023 |
| Lead and Copper Rule | IL1795450 | Resolved | Dec 30, 2022through Feb 7, 2023 |
| Lead and Copper Rule | IL1790750 | Resolved | Dec 30, 2021through Jan 26, 2022 |
No reported violation does not prove that every contaminant was tested or absent; SDWIS measured values are incomplete and lag state records.
Solutions matcher
Your personalized water action plan
Matched to Washington ZIP 61571 using 310 PPM nearby hardness and 2 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
310 PPM is 3× the high-hardness trigger used by this matcher.
Designed to reduce scale on fixtures, water heaters, glassware, and plumbing throughout the home.
Compare whole-house systemsDrinking water protection
Under-Sink Reverse Osmosis System
Copper (90th percentile), Lead and Copper Rule have a measured benchmark flag or active health-based SDWIS record in this profile.
A certified multi-stage RO system targets a broader range of dissolved contaminants at the kitchen tap.
Explore under-sink filtrationAffiliate disclosure: we may earn a commission from qualifying purchases, at no added cost to you. Product matching is educational and does not replace certified water testing.
Frequently asked
Water questions for Washington
Is tap water safe in Washington?+
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?+
Nearby USGS observations produce an estimate of 310 PPM, or 18.1 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 310 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.