Hardness
Very Hard
254.5 PPM · 14.9 GPG
Local water dashboard
Official source aggregationWater quality in Antigo, WI 54409
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Langlade County.
1 active health-based violation
- Primary matched system
- Antigo Waterworks
- Source water
- Groundwater
- County
- Langlade 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
0.0016 mg/L
10% of action level
Utility match
2 systems
Serves 7,780 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
254.5 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
254.5
mg/L as CaCO₃ equivalent
Grains per gallon
14.9
1 GPG ≈ 17.1 PPM
What this means at home
At 254.5 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
38
Nearest site
6 mi
Observation range
Aug 2, 2016–Sep 12, 2024
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: LA-30/11E/25-1310 (Well).USGS source documentation ↗
Regional context
Is 54409 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Antigo median
255 PPM
About the same1 indexed ZIP readings · Range 254.5–254.5 PPM
Wisconsin median
288 PPM
33 PPM lower556 indexed ZIP readings · Range 41.3–467 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 pass
Lead (PB90)
0.0016 mg/L
Reported Sep 30, 2024
Copper (CU90)
Not available
No numerical 90th-percentile result
Numerical coverage
1 comparable result
Missing values remain blank; absence is not treated as a pass.
Lead (90th percentile)
Measured in mg/L
Local 0.0016
EPA limit 0.015
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 22
- Health-based
- 6
- Active health-based
- 1
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Groundwater RuleHealth-based | WI7340086 | Addressed | Jul 2, 2025 |
| Revised Total Coliform Rule | WI7370123 | Resolved | Jul 1, 2025through Jul 31, 2025 |
| Public Notice | WI7340086 | Resolved | Feb 1, 2025through Apr 26, 2025 |
| Groundwater RuleHealth-based | WI7340086 | Resolved | Feb 1, 2025through Mar 18, 2025 |
| Lead and Copper Rule | WI7370123 | Resolved | Jan 1, 2025through Oct 14, 2025 |
| Groundwater RuleHealth-based | WI7340086 | Resolved | Dec 16, 2024through Dec 30, 2024 |
| Public Notice | WI7340086 | Resolved | Dec 16, 2024through Mar 28, 2025 |
| LEAD AND COPPER RULE REVISIONSHealth-based | WI7340086 | Resolved | Oct 17, 2024through May 30, 2025 |
| Public Notice | WI7340086 | Unaddressed | Oct 17, 2024 |
| LEAD AND COPPER RULE REVISIONS | WI7370123 | Resolved | Oct 17, 2024through Feb 25, 2025 |
| LEAD AND COPPER RULE REVISIONSHealth-based | WI7370123 | Resolved | Oct 17, 2024through Nov 19, 2024 |
| Public Notice | WI7370123 | Unaddressed | Oct 17, 2024 |
| Public Notice | WI7370123 | Unaddressed | Oct 17, 2024 |
| Consumer Confidence Rule | WI7370123 | Resolved | Jul 1, 2024through Jul 8, 2025 |
| Consumer Confidence Rule | WI7370123 | Resolved | Jul 1, 2024through Jul 8, 2025 |
| Consumer Confidence Rule | WI7370123 | Resolved | Jul 1, 2022through Jul 27, 2022 |
| Consumer Confidence Rule | WI7370123 | Resolved | Jul 1, 2022through Jul 29, 2022 |
| Public Notice | WI7340086 | Resolved | Apr 2, 2022through Aug 4, 2022 |
| Groundwater RuleHealth-based | WI7340086 | Resolved | Apr 2, 2022through Aug 4, 2022 |
| Lead and Copper Rule | WI7370123 | Resolved | Jan 1, 2022through Feb 2, 2024 |
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 Antigo ZIP 54409 using 254.5 PPM nearby hardness and 1 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
254.5 PPM is 2× 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
Groundwater Rule has 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 Antigo
Is tap water safe in Antigo?+
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 254.5 PPM, or 14.9 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 254.5 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.