Hardness
Soft
58 PPM · 3.4 GPG
Local water dashboard
Official source aggregationWater quality in Petersburg, AK 99833
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Petersburg Borough.
No active health-based violation reported
- Primary matched system
- Petersburg
- Source water
- Surface water
- County
- Petersburg Borough
- Profile updated
At a glance
What the current records say
EPA quarter 2026Q2
Compliance screen
No active flag
0 active health-based records
Lead 90th percentile
0.0035 mg/L
23% of action level
Utility match
1 system
Serves 3,218 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
58 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
58
mg/L as CaCO₃ equivalent
Grains per gallon
3.4
1 GPG ≈ 17.1 PPM
What this means at home
At 58 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
41 mi
Observation range
Aug 23, 2017–Jul 22, 2025
Estimate confidence
Low
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: STIKINE R NR WRANGELL AK (Stream).USGS source documentation ↗
Regional context
Is 99833 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Petersburg median
58 PPM
About the same1 indexed ZIP readings · Range 58–58 PPM
Alaska median
83 PPM
25 PPM lower18 indexed ZIP readings · Range 36.7–199 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)
0.0035 mg/L
Reported Dec 31, 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 0.0035
EPA limit 0.015
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 3
- Health-based
- 0
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Revised Total Coliform Rule | AK2130148 | Resolved | Aug 1, 2024through Aug 31, 2024 |
| Surface Water Treatment Rule | AK2130148 | Resolved | Aug 1, 2024through Aug 31, 2024 |
| Chlorine | AK2130148 | Resolved | Aug 1, 2024through Aug 31, 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 Petersburg ZIP 99833 using 58 PPM nearby hardness and 1 reported measurement benchmarks.
No urgent match
Start with an independent water test
This profile does not trigger a treatment recommendation. Test at the tap before investing in equipment.
Affiliate 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 Petersburg
Is tap water safe in Petersburg?+
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?+
Nearby USGS observations produce an estimate of 58 PPM, or 3.4 grains per gallon, classified as soft. This is not a household tap measurement.
Do I need a water softener?+
There is no high-hardness trigger in this profile. Confirm with a tap test before buying equipment.