Pleasanton, California
City of Pleasanton 2025 Annual Water Quality Report. Zone 7 treated surface water hardness 88 mg/L (range 56–152); groundwater 318 mg/L (range 35–452). DSRSD and the city discourage self-regenerating softeners and issue permits — a prohibition like Ironhouse Ordinance 57 did not turn up. Ask the sewer agency on the bill.
- Hardness (Zone 7 surface)88 mg/L (range 56–152)
- Hardness (groundwater)318 mg/L (range 35–452)
- Chloramines2.31 mg/L RAA (range 2.14–2.53)
- TTHMs41 µg/L LRAA (range ND–111.31)
Best match for Pleasanton
Salt-based water softener — confirm the district first
Check the sanitation district before installing a salt system.
Ask the agency on the sewer side of the bill before you cut a brine drain. California lets districts restrict self-regenerating units. A “banned in California” blog is not your district.
Some links are affiliate links. If you buy through one, we may earn a commission. That does not change the match, and it is not a medical claim.
As an Amazon Associate we earn from qualifying purchases.
Other options that still fit
Salt-free conditioner
A salt-free conditioner changes how scale sticks. It does not soften. Soap and spots stay closer to untreated. No brine line.
Whole-house catalytic carbon for chloramine
Catalytic carbon with a chloramine claim (NSF/ANSI 42 for chloramine). Regular chlorine carbon is the wrong box.
Under-sink reverse osmosis
The under-sink RO we actually run is Cloud RO — NSF/ANSI 58, kitchen tap, not a whole-house tank. Check the exact listing if PFAS is why you are shopping. Shop Amazon first for under-sink RO, or buy Cloud direct. Waterdrop is a tankless option if you want that path. A certifier-listed pitcher is the cheap first step. Nobody is paying for a medical claim.
Shop under-sink reverse osmosisBuy Cloud RO directShop Waterdrop reverse osmosisShop PFAS-listed pitchers
Test the tap first
A homeowner kit is a start. It is not a state-certified lab. Use a certified lab when the decision is expensive.
On the report
- Water utility
- City of Pleasanton Public Works
- Hardness
- Zone 7 treated surface water 88 mg/L as CaCO3 (range 56–152). Groundwater 318 mg/L (range 35–452). Those are two labeled columns, not a blended citywide number. 2025 Annual Water Quality Report. — City of Pleasanton 2025 Annual Water Quality Report
- Disinfectant
- Chloramines as chlorine 2.31 mg/L RAA (range of monthly averages 2.14–2.53), MRDL 4.0. Distribution-system table, 2025 report. — City of Pleasanton 2025 Annual Water Quality Report
- Sanitation district
- City of Pleasanton / Dublin San Ramon Services District (address-specific)
- Brine / salt to the sewer
- Check the sanitation district before installing. DSRSD’s hardness page discourages self-regenerating softeners because brine raises recycled-water salinity. Pleasanton’s building handout still lists California Plumbing Code / Health & Safety Code permit requirements for residential softeners and says DSRSD may authorize non-residential units. That is not an install prohibition like Ironhouse Ordinance 57. Ask Public Works or the agency on the sewer bill about the address.
Also around here
Extra context besides the utility report and the chart above — geology, an unregulated table, or a published study. Not a second set of printed tap numbers.
- MicroplasticsWHO’s 2019 review examined studies that found microplastic particles in treated tap and bottled water in many places. That is a published-occurrence finding, not a number from this city’s water-quality report, and we do not invent a particles-per-liter count for the tap.Microplastics in drinking-water — World Health Organization
- Tank 1600 / Kilkare DBP noticeThe 2025 report prints a locational running-annual-average exceedance for TTHMs and HAA5 at Tank 1600 serving 164 residents in the Kilkare area. That is a printed notice for one tank, not a citywide average.Distribution TTHMs highest LRAA 41 µg/L (range ND–111.31). HAA5 highest LRAA 27 µg/L (range ND–116.7).2025 Annual Water Quality Report — City of Pleasanton Public Works
Pleasanton drinking water is Zone 7 treated surface water and local groundwater delivered by the City of Pleasanton. DSRSD’s hardness page discourages self-regenerating softeners. The city’s permit handout still lists California Plumbing Code and Health & Safety Code requirements for residential units. That is not an install prohibition like Ironhouse Ordinance 57. Ask Public Works or the agency on the sewer bill about the address. This is not a legal opinion.
The 2025 Annual Water Quality Report prints hardness as two labeled columns — Zone 7 treated surface water 88 mg/L as CaCO3 (range 56–152) and groundwater 318 mg/L (range 35–452). We do not invent a blend.
Chloramines as chlorine 2.31 mg/L running annual average (range of monthly averages 2.14–2.53). The booklet prints a Tank 1600 / Kilkare locational running-annual-average exceedance for TTHMs and HAA5 serving 164 residents; the city says that location returned to compliance by year-end. Kitchen shopping stays the Cloud RO / Waterdrop path already used on other cities if a listing is why you are looking.
Sources
- 2025 Annual Water Quality Report — City of Pleasanton Public Works. Accessed 2026-09-09.
- Water Hardness & Softeners — Dublin San Ramon Services District. Accessed 2026-09-09.
Updated September 9, 2026. A city file is chemistry we can cite plus the sewer rule. No invented detections.