Best Water Filters for St. Petersburg, Matched to Its Water
Matched to St. Petersburg's own record: lead, PFAS, hard water. Each option names the certification to check. Not a generic “best filters” list.
Three concerns to filter for. Three other findings detected.
Each card starts from a finding in the published record. The certification is what to look for on the certifier’s listing (NSF, WQA or IAPMO) for the exact model.
Lead
lead 1.8 µg/L, below the 15 µg/L action level (detected below the limit); 4,802 galvanized lines to replace (context, not a tap measurement)
Lead-certified carbon filter, or reverse osmosis · NSF/ANSI 53 (lead)
PFAS
PFPeA 3.1 ng/L detected (no federal or state limit) (detected, no federal or state limit)
Reverse osmosis, or carbon certified for PFAS · NSF/ANSI 58 or 53, with PFPeA named on the listing
Hard water
9.6 gpg (hard) (aesthetic)
Ion-exchange water softener · NSF/ANSI 44 (softeners)
Haloacetic acids (HAA5)
22.7ppb · 2024
HAA5 is a group of five haloacetic acids: disinfection by-products that, like TTHMs, form when chlorine reacts with organic matter.
Relevant treatment: Activated carbon, Reverse osmosis.
Total trihalomethanes (TTHM)
22ppb · 2024
TTHMs are disinfection by-products that form when chlorine reacts with natural organic matter in water.
Relevant treatment: Activated carbon, Reverse osmosis.
Water hardness
9.6gpg · 164 mg/L as CaCO₃ · 2024
Hardness is dissolved calcium and magnesium picked up from rock and soil.
Relevant treatment: Ion-exchange water softener, Salt-free conditioner, Reverse osmosis (point-of-use).
Certified for a concern found here
Eligibility boundary. A product appears only when its registry-verified certification covers a concern in the record. Verify the exact model and contaminant-specific certification before purchase: certification to a broad standard does not mean every contaminant claim under that standard applies to every model.
A product appears here only when a current certification record covers at least one identified concern; every concern stays listed. The retail offer is looked up afterwards and never changes which products appear or their order. As an Amazon Associate, PurityMap earns from qualifying purchases. Affiliate disclosure.
Aquasana Claryum 3-Stage Max Flow Under-Sink Filter (AQ-6300M)
Fit for St. Petersburg’s record
- LeadEligible · evidence match✓
- Perfluoropentanoic acid (PFPeA)Not established–
- Hardness / scaleNot established–
Not suitable for
- Treating every tap in the home
- A whole-home hard-water or scale problem
- All PFAS: its evidence covers only the compounds it names
- Anyone who can't plumb, drill or hire an installer
- Renters who can't modify plumbing
Aquasana Clean Water Machine Countertop Filter (AQ-CWM2)
Fit for St. Petersburg’s record
- LeadEligible · evidence match✓
- Perfluoropentanoic acid (PFPeA)Not established–
- Hardness / scaleNot established–
Not suitable for
- Treating every tap in the home
- A whole-home hard-water or scale problem
- All PFAS: its evidence covers only the compounds it names
AquaTru Classic Countertop Reverse-Osmosis Purifier (AT2000)
Fit for St. Petersburg’s record
- LeadEligible · evidence match✓
- Perfluoropentanoic acid (PFPeA)Not established–
- Hardness / scaleNot established–
Not suitable for
- Treating every tap in the home
- A whole-home hard-water or scale problem
- All PFAS: its evidence covers only the compounds it names
Culligan ZeroWater 10-Cup Pitcher (ZEROP10)
Fit for St. Petersburg’s record
- LeadEligible · evidence match✓
- Perfluoropentanoic acid (PFPeA)Not established–
- Hardness / scaleNot established–
Not suitable for
- Treating every tap in the home
- A whole-home hard-water or scale problem
- All PFAS: its evidence covers only the compounds it names
Faucet-Mount Filter
Fit for St. Petersburg’s record
- LeadEligible · evidence match✓
- Perfluoropentanoic acid (PFPeA)Not established–
- Hardness / scaleNot established–
Not suitable for
- Treating every tap in the home
- A whole-home hard-water or scale problem
- All PFAS: its evidence covers only the compounds it names
GE GXSH35W Water Softener (35,000-grain)
Fit for St. Petersburg’s record
- LeadNot established–
- Perfluoropentanoic acid (PFPeA)Not established–
- Hardness / scaleEligible · evidence match✓
Not suitable for
- Treating only the drinking-water tap
- Lead from plumbing after the point it treats
- Anyone who can't plumb, drill or hire an installer
- Renters who can't modify plumbing
Kenmore 420 Water Softener (40,000-grain)
Fit for St. Petersburg’s record
- LeadNot established–
- Perfluoropentanoic acid (PFPeA)Not established–
- Hardness / scaleEligible · evidence match✓
Not suitable for
- Treating only the drinking-water tap
- Lead from plumbing after the point it treats
- Anyone who can't plumb, drill or hire an installer
- Renters who can't modify plumbing
Under-Sink Carbon Block Filter
Fit for St. Petersburg’s record
- LeadEligible · evidence match✓
- Perfluoropentanoic acid (PFPeA)Not established–
- Hardness / scaleNot established–
Not suitable for
- Treating every tap in the home
- A whole-home hard-water or scale problem
- All PFAS: its evidence covers only the compounds it names
- Anyone who can't plumb, drill or hire an installer
Under-Sink Reverse-Osmosis System
Fit for St. Petersburg’s record
- LeadEligible · evidence match✓
- Perfluoropentanoic acid (PFPeA)Not established–
- Hardness / scaleNot established–
Not suitable for
- Treating every tap in the home
- A whole-home hard-water or scale problem
- All PFAS: its evidence covers only the compounds it names
- Anyone who can't plumb, drill or hire an installer
- Renters who can't modify plumbing
Waterdrop G3P600 Tankless Reverse-Osmosis System
Fit for St. Petersburg’s record
- LeadEligible · evidence match✓
- Perfluoropentanoic acid (PFPeA)Not established–
- Hardness / scaleNot established–
Not suitable for
- Treating every tap in the home
- A whole-home hard-water or scale problem
- All PFAS: its evidence covers only the compounds it names
- Anyone who can't plumb, drill or hire an installer
- Renters who can't modify plumbing
Whirlpool Filter 3 Refrigerator Water Filter (WHR3RXD1)
Fit for St. Petersburg’s record
- LeadEligible · evidence match✓
- Perfluoropentanoic acid (PFPeA)Not established–
- Hardness / scaleNot established–
Not suitable for
- Treating every tap in the home
- A whole-home hard-water or scale problem
- All PFAS: its evidence covers only the compounds it names
- Browse, not a match. Listing says nothing about what a product covers:
- Brita Elite Water Filter Pitcher
- Clearly Filtered Pitcher (lab-tested, not NSF 53 certified)
- Countertop Gravity Filter
Know what reaches your glass.
Plumbing inside a home can add lead that the system record can't show. A tap test tells you what reaches your glass.
Need it installed or tested in St. Petersburg?
Test your own tap
Screening tells you if something is worth a closer look; a lab result is the number you can act on.
As an Amazon Associate, PurityMap earns from qualifying purchases. Affiliate disclosure.
Screening: quick check, not lab-grade
Varify 17-in-1 Complete Water Test Kit
Varify
17 strip readings, including lead, chlorine, fluoride, iron and hardness, plus 2 coliform bacteria tests
- Turnaround: About 1 minute; the bacteria test takes 48 hours
What it can't tell you: Strip colors give rough ranges, not lab numbers, and it cannot detect PFAS or arsenic.
Lab-certified results
ETR Labs Basic Water Quality Test Kit
ETR Laboratories
50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria
- Analyzed by Environmental Testing and Research Laboratories (ETR Labs), Leominster, MA · ISO/IEC 17025:2017, ANAB certificate AT-2638
- Turnaround: 2–4 business days after the lab receives it
What it can't tell you: It does not test PFAS, and not every result on the panel falls under the lab's accredited scope.
Sources and methodology
Analysis first, commerce second: retail relationships do not change which products qualify. How PurityMap evaluates recommendations
- UCMR5 Analytical ResultsUCMR5 Analytical Results: ST PETERSBURG, CITY OF (FL6521715)US EPA · 2026-01-15View source ↗
- State SDWIS Compliance RecordLead & Copper Rule 90th-percentile: ST PETERSBURG, CITY OF (FL6521715)US EPA SDWIS · 2026-07-09View source ↗
- Consumer Confidence Report (CCR)City of St. Petersburg 2024 Consumer Confidence Report (CCR)City of St. Petersburg · 2024-01-01View source ↗
Frequently asked
What water filter do I need in St. Petersburg?
Based on the published record: Lead (lead 1.8 µg/L, below the 15 µg/L action level (detected below the limit); 4,802 galvanized lines to replace (context, not a tap measurement)): if you choose to filter, look for lead-certified carbon filter, or reverse osmosis, certified to NSF/ANSI 53 (lead); PFAS (PFPeA 3.1 ng/L detected (no federal or state limit); detected, no federal or state limit): if you choose to filter, look for reverse osmosis, or carbon certified for pfas, certified to NSF/ANSI 58 or 53, with PFPeA named on the listing; Hard water (9.6 gpg (hard); aesthetic): if you choose to filter, look for ion-exchange water softener, certified to NSF/ANSI 44 (softeners). If you choose to filter, pick a model whose certification names each contaminant you want to reduce.
Does "NSF certified" mean a filter removes everything?
No. Certification is per contaminant: a filter certified to NSF/ANSI 42 for chlorine taste says nothing about lead or PFAS. Check the certifier's listing (NSF, WQA or IAPMO) for the exact model and the exact contaminant.
Is a pitcher enough for lead in St. Petersburg?
A pitcher certified to NSF/ANSI 53 for lead reduces lead in the water you pour through it; replace cartridges on schedule. For a lead service line, replacing the line is the lasting fix; ask the utility about its replacement program.