Hardness
Very Hard
207 PPM · 12.1 GPG
Local water dashboard
Official source aggregationWater quality in St. Marys, GA 31558
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Camden County.
1 reported benchmark flag
- Primary matched system
- St. Marys
- Source water
- Groundwater
- County
- Camden County
- 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
0.001 mg/L
7% of action level
Utility match
1 system
Serves 19,408 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
207 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
207
mg/L as CaCO₃ equivalent
Grains per gallon
12.1
1 GPG ≈ 17.1 PPM
What this means at home
At 207 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
28
Nearest site
12.8 mi
Observation range
Dec 6, 2016–Jan 15, 2026
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: JEA NASSAU WELL NO. 1 (Well).USGS source documentation ↗
Regional context
Is 31558 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
St. Marys median
207 PPM
About the same1 indexed ZIP readings · Range 207–207 PPM
Georgia median
40 PPM
167 PPM higher469 indexed ZIP readings · Range 3–207 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)
0.001 mg/L
Reported Dec 31, 2025
Copper (CU90)
154 mg/L
Reported Dec 31, 2001
Numerical coverage
2 comparable results
Missing values remain blank; absence is not treated as a pass.
Lead (90th percentile)
Measured in mg/L
Local 0.001
EPA limit 0.015
Copper (90th percentile)
Measured in mg/L
Local 154
EPA limit 1.3
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 9
- Health-based
- 0
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Public Notice | GA0390001 | Unaddressed | Sep 7, 2023 |
| Consumer Confidence Rule | GA0390001 | Resolved | Jul 1, 2023through Aug 17, 2023 |
| Public Notice | GA0390001 | Unaddressed | Aug 5, 2022 |
| E. COLI | GA0390001 | Resolved | Jul 29, 2022through Sep 19, 2022 |
| Public Notice | GA0390001 | Unaddressed | Jul 27, 2022 |
| Consumer Confidence Rule | GA0390001 | Unaddressed | Jul 1, 2021 |
| Revised Total Coliform Rule | GA0390001 | Resolved | Jun 1, 2021through Jun 30, 2021 |
| Revised Total Coliform Rule | GA0390001 | Resolved | May 1, 2021through May 31, 2021 |
| Public Notice | GA0390001 | Unaddressed | Apr 18, 2021 |
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 St. Marys ZIP 31558 using 207 PPM nearby hardness and 2 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
207 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
Copper (90th percentile) 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 St. Marys
Is tap water safe in St. Marys?+
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 207 PPM, or 12.1 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 207 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.