Sacramento Water Treatment: What to Filter

Does Sacramento water treatment leave a taste?

Yes, a mild chlorine one: every supplier that names its disinfectant uses free chlorine, and the City's 2025 distribution average reads 0.8 mg/L. None reports chloramine. Reports print this in ppm, the same as mg/L; smaller amounts appear in ppb and ppt.

EPA's maximum residual disinfectant level for chlorine is 4.0 mg/L, so the taste is a preference question. An open pitcher in the refrigerator, a filter certified to NSF/ANSI 42, or a whole-house carbon tank are the options, cheapest first, compared on chlorine taste and carbon filters.

Readings across the treatment topics

• 0.8 mg/LChlorine residual in City of Sacramento pipes, 2025City of Sacramento 2025 CCR
• 0Lead service lines in California inventories of nearly 10 million linesState Water Board
• 10 µg/LCalifornia hexavalent chromium limit since Oct 1, 2024State Water Board
• 2.3 galMost a WaterSense-labeled RO unit may send to drain per treated gallonEPA WaterSense

When is reverse osmosis worth it?

When a report or lab test shows a contaminant the unit is certified to reduce, which is more likely on groundwater than river water. EPA WaterSense says it does not intend to promote reverse osmosis "for all applications", and a typical unit sends 5 gallons or more to drain for each gallon it makes.

On soft lake and river water the City of Sacramento averages 205 mg/L dissolved solids and San Juan's treated water 31 mg/L, so reverse osmosis mainly changes taste. The certification details, running costs and drain water are on reverse osmosis in Sacramento.

Which filters are certified for lead?

Look for NSF/ANSI 53 on a filter or NSF/ANSI 58 on a reverse osmosis unit, and make sure lead itself appears among the claims. EPA's June 2024 lead-filter handout adds: find the certifier's mark on the box, then confirm the model in that certifier's directory.

In 2023 sampling, no City of Sacramento home of the 56 tested exceeded the action level, while the EID Main system in El Dorado Hills counted 3 of 55 above it. With no lead service lines reported, older brass fixtures and solder inside the house are the usual source. Testing steps and filter choices are on lead in Sacramento tap water.

What about chromium 6 and PFAS?

Both are groundwater questions here, and most suppliers report results below the limits. Against the state's 10 µg/L hexavalent chromium standard, Rio Linda/Elverta averages 10.6 µg/L, with a compliance date of October 2027 by its own account; the City of Sacramento averages 3.5 µg/L.

For PFAS, the federal 2024 rule caps PFOA and PFOS at 4.0 ppt apiece, and in May 2026 EPA proposed moving their compliance date to 2031. SCWA pulled four Laguna wells; most river-supplied systems report none detected. Supplier-by-supplier readings and certified filters are on chromium 6 and PFAS.

How are private wells treated?

In stages, once a lab report is in hand: grit removal leads, iron and manganese follow, a softener comes next, and UV closes the run, while reverse osmosis serves only the kitchen. California's GAMA well testing advice is a test each year, with basic lab sampling priced at $100 to $400.

Penn State Extension's iron and manganese article puts the staining thresholds at 0.3 mg/L iron and 0.05 mg/L manganese, and notes oxidized iron fouls softener resin, which is why the iron stage comes before the softener. The full order, with what each stage does and does not handle, is on well water treatment.

• Treatment: Chlorine taste and carbon filters
• Treatment: Is reverse osmosis worth it in Sacramento?
• Treatment: Lead in Sacramento tap water: testing and filters
• Treatment: Chromium 6 and PFAS readings by supplier
• Treatment: Well water treatment, stage by stage

Downstream questions