All the numbers, one table
Every page on this desk leads with one figure. Here they all are, each linked to its page and sources.
| Number | What | Page |
|---|---|---|
| $17.90 | per 1,000 gallons in Tier 1, water plus sewer | WSSC Water rate tiers |
| $319.19 | 90 days at 145 gallons a day, our arithmetic | Quarterly bill by gallons a day |
| $73.38 | fixed part of a 90-day bill, 5/8-inch meter, our arithmetic | Fixed fees on the bill |
| 5.0% | average FY27 rate rise, effective July 1, 2026 | Rate increases by year |
| 3× | daily use against the same season last year, the adjustment line | Why the bill jumped |
| $247 | most a year in CAP credit, on fees including Bay fee | Help paying |
| $467.24 | added per 90-day bill by 200 gallons a day, our arithmetic | What a running toilet costs |
| $433.67 | one hour a week, 13 weeks, landing on one bill | Summer watering cost |
| 644 | breaks and leaks in January 2025, the peak of that winter | Main breaks by winter |
| 42% | of water mains more than 50 years old in 2025 | How old the mains are |
| Property line | where WSSC Water's responsibility ends and yours begins | Who owns which pipe |
| 97.3% | of inventory confirmed non-lead at April 30, 2025 | Lead service line inventory |
| 1 minute | at a rolling boil, then cool, during an advisory | Boil water and essential-use notices |
| Inside: yours | inside pipes and meters are the owner's; outside meters, the utility's | Frozen pipes and meters |
| WSSC license | what the utility requires of plumbers and gasfitters in the two counties | Hiring a licensed plumber |
| 154 mg/L | Potomac plant average hardness, 2025; Patuxent plant averages 70 mg/L | Hardness by plant |
| About 75% | of customers served by the Potomac plant | Which plant serves you |
| Below 2 ppb | 90th-percentile lead, 69 sites; a system figure, not your tap | Lead in tap water |
| About 1.1 ppt | Potomac PFOS running annual average, 2025; EPA's limit is 4.0 ppt | PFAS numbers |
| 10 lines | from the 2025 report, each shown for both plants | The tap report, line by line |
| 120°F | the water heater setting CPSC urges, to cut scald risk | Water heaters and scale |