Hardness
Very Hard
1043 PPM · 61 GPG
Local water dashboard
Official source aggregationWater quality in Aberdeen, SD 57401
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Brown County.
1 active health-based violation
- Primary matched system
- Aberdeen
- Source water
- Surface water + Groundwater
- County
- Brown 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
0.002 mg/L
13% of action level
Utility match
10 systems
Serves 27,989 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
1043 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
1043
mg/L as CaCO₃ equivalent
Grains per gallon
61
1 GPG ≈ 17.1 PPM
What this means at home
At 1043 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
2
Nearest site
55.9 mi
Observation range
Mar 29, 2016–Jan 15, 2026
Estimate confidence
Low
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: BEAR CREEK NEAR OAKES, ND (Stream).USGS source documentation ↗
Regional context
Is 57401 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Aberdeen median
1043 PPM
About the same1 indexed ZIP readings · Range 1043–1043 PPM
South Dakota median
516 PPM
527 PPM higher234 indexed ZIP readings · Range 20.5–1330 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)
0.002 mg/L
Reported Dec 31, 2025
Copper (CU90)
1.46 mg/L
Reported Dec 31, 1995
Numerical coverage
2 comparable results
Missing values remain blank; absence is not treated as a pass.
Lead (90th percentile)
Measured in mg/L
Local 0.002
EPA limit 0.015
Copper (90th percentile)
Measured in mg/L
Local 1.46
EPA limit 1.3
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 35
- Health-based
- 10
- Active health-based
- 1
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Interim Enhanced Surface Water Treatment RuleHealth-based | SD4600020 | Archived | Feb 1, 2026through Feb 28, 2026 |
| Chlorine | SD4600019 | Archived | Jan 1, 2026through Mar 31, 2026 |
| Stage 1 Disinfectants and Disinfection Byproducts RuleHealth-based | SD4600019 | Unaddressed | Nov 12, 2025 |
| Revised Total Coliform Rule | SD4600023 | Resolved | Oct 1, 2025through Oct 31, 2025 |
| Revised Total Coliform Rule | SD4600019 | Resolved | Aug 1, 2025through Aug 31, 2025 |
| Consumer Confidence Rule | SD4600022 | Unaddressed | Jul 1, 2025 |
| Consumer Confidence Rule | SD4600404 | Unaddressed | Jul 1, 2025 |
| Interim Enhanced Surface Water Treatment RuleHealth-based | SD4600020 | Resolved | May 1, 2025through May 31, 2025 |
| Interim Enhanced Surface Water Treatment RuleHealth-based | SD4600020 | Resolved | Dec 1, 2024through Dec 31, 2024 |
| Interim Enhanced Surface Water Treatment RuleHealth-based | SD4600020 | Resolved | Dec 1, 2024through Dec 31, 2024 |
| Interim Enhanced Surface Water Treatment RuleHealth-based | SD4600020 | Resolved | Nov 1, 2024through Nov 30, 2024 |
| LEAD AND COPPER RULE REVISIONSHealth-based | SD4600019 | Resolved | Oct 17, 2024through Mar 17, 2025 |
| LEAD AND COPPER RULE REVISIONS | SD4600019 | Resolved | Oct 17, 2024through Mar 17, 2025 |
| Consumer Confidence Rule | SD4600019 | Unaddressed | Jul 1, 2024 |
| Lead and Copper Rule | SD4600022 | Resolved | Oct 1, 2023through Aug 21, 2024 |
| Lead and Copper Rule | SD4600019 | Resolved | Oct 1, 2023through Sep 30, 2024 |
| Lead and Copper Rule | SD4600179 | Resolved | Oct 1, 2023through Aug 26, 2024 |
| Lead and Copper Rule | SD4600023 | Resolved | Oct 1, 2023through Sep 8, 2024 |
| Interim Enhanced Surface Water Treatment RuleHealth-based | SD4600020 | Resolved | Jul 1, 2023through Jul 31, 2023 |
| Groundwater Rule | SD4600404 | Resolved | Jul 1, 2023through Aug 25, 2023 |
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 Aberdeen ZIP 57401 using 1043 PPM nearby hardness and 2 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
1043 PPM is 9× 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), Stage 1 Disinfectants and Disinfection Byproducts 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 Aberdeen
Is tap water safe in Aberdeen?+
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 1043 PPM, or 61 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 1043 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.