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Irvine Ranch Water District (IRWD)

Irvine Watering Schedule

No set daysRules verified August 28, 2026

No assigned days or hours. These rules apply year-round

  • No potable water on outdoor landscapes during and within 48 hours of measurable rainfall.
  • No gutter flooding where the escape of water can reasonably be prevented, and no unrepaired leaks.
  • No washing hard or paved surfaces except when necessary to alleviate safety or sanitary hazards.
  • Washing a motor vehicle needs a hose fitted with a shut-off nozzle, and a fountain needs recirculated water.
  • Recommended, not required: IRWD's monthly guide prints suggested day counts and run times by irrigation type.

IRWD assigns no watering days and no watering hours in Irvine: no odd/even rule, no days-per-week cap, and no time-of-day window appears in its Rules and Regulations or on its watering guide. What is in force year-round are the permanent waste prohibitions in Rules 15.4.1, including no potable water on outdoor landscapes during and within 48 hours of measurable rainfall. IRWD's monthly watering guide does print day counts, such as 4 days for turfgrass spray heads in July, but that chart is the district's own recommendation and not an enforceable schedule. The everyday cost of overwatering is the budget-based rate structure, where usage past 100 percent of your monthly budget moves into the Inefficient and Wasteful tiers. IRWD's Board rescinded the Level 2 Shortage on April 10, 2023 and has declared no shortage level since, so only the permanent rules apply.

How many minutes on each watering day

Irvine Ranch Water District (IRWD) assigns no watering days, so nobody can tell you how many days to split the week across. Set the days you actually water and this works out the minutes from Irvine's climate for the month you pick.

Climate data

Irvine · 48.3 in/yr

About 30 minutes per watering day, 2 days a week.

How that was worked out

Week's climate demand: 6.1 in for July × 7 ÷ 31 days = 1.377 in

Plants need: 1.377 × 0.8 = 1.102 in this week

Run time: 1.102 ÷ (1.6 in/hr × 0.7) × 60 = 59 min per week

Split: 59 ÷ 2 watering days = 30 min each time

If water runs off the edges before the cycle ends, split each day into shorter back-to-back cycles with a soak break between them. The total minutes stay the same.

Rain is not subtracted here. Skip watering during and after rain, and follow your supplier's rain rule. Point-source drip emitters and Bubblers are not in the list above: no manufacturer publishes an inches-per-hour rate for them, so those zones are watered by volume rather than by a run time against a rate.

Want the full method, the nozzle rate tables and their sources? Open the run time calculator.

Current status

No shortage level declared. IRWD's Board rescinded the Level 2 Shortage on April 10, 2023 and has declared no shortage level since. The 2025 Water Shortage Contingency Plan, adopted by the Board on June 22, 2026, states: "On April 10, 2023, IRWD's Board rescinded the Level 2 Shortage. Permanent restrictions to prohibit water waste remain in effect." Table 4-2 of that plan, "Minimum Potable Water Budgets at Each Water Shortage Level", labels the baseline row "No Shortage" with a target reduction of 0 percent, an ET factor of .75 and 50 indoor gallons per capita. IRWD's six levels, set out in Rules and Regulations 15.5.2, are Level One (Shortage Warning, up to 10 percent), Level Two (Significant Shortage Condition, 11 to 20 percent), Level Three (Severe Shortage, 21 to 30 percent), Level Four (Severe Shortage, 31 to 40 percent), Level Five (Crisis Shortage, 41 to 50 percent) and Level Six (Crisis Shortage, more than 50 percent). None is active.

The schedule

January

January (IRWD prints its guide by calendar month and publishes no date ranges)

Days: Advisory only, no required day count. Spray heads: turfgrass 2 days, drought tolerant trees, shrubs and groundcover 1 day. Rain Bird XFD dripline 1 day. Netafim Techline CV dripline 1 day. Seasonal percent option 30%.

Hours: None. IRWD publishes no start time, no stop time and no time-of-day window on its watering guide, on its schedule PDFs or in its Rules and Regulations.

Run-time limits: Spray heads: turfgrass 2 cycles of 2 minutes; drought tolerant 2 cycles of 3 minutes. Rain Bird XFD, drought tolerant: 18 in emitter / 18 in row / 0.6 GPH, 1 cycle of 50 minutes; 12 in emitter / 18 in row / 0.9 GPH, 1 cycle of 22 minutes. Netafim Techline CV, drought tolerant: 18 in / 18 in / 0.4 GPH, 1 cycle of 72 minutes; 12 in / 18 in / 0.6 GPH, 1 cycle of 33 minutes.

February

February (printed by IRWD as "Febuary" on the web table and on both schedule PDFs)

Days: Advisory only, no required day count. Spray heads: turfgrass 2 days, drought tolerant 1 day. Rain Bird XFD 1 day. Netafim Techline CV 1 day. Seasonal percent option 30%.

Hours: None published by IRWD.

Run-time limits: Spray heads: turfgrass 2 cycles of 2 minutes; drought tolerant 2 cycles of 3 minutes. Rain Bird XFD: 0.6 GPH 1 cycle of 56 minutes; 0.9 GPH 1 cycle of 25 minutes. Netafim Techline CV: 0.4 GPH 1 cycle of 80 minutes; 0.6 GPH 1 cycle of 37 minutes.

March

March

Days: Advisory only, no required day count. Spray heads: turfgrass 3 days, drought tolerant 2 days. Rain Bird XFD 2 days. Netafim Techline CV 2 days. Seasonal percent option 50%.

Hours: None published by IRWD.

Run-time limits: Spray heads: turfgrass 2 cycles of 3 minutes; drought tolerant 2 cycles of 3 minutes. Rain Bird XFD: 0.6 GPH 1 cycle of 39 minutes; 0.9 GPH 1 cycle of 17 minutes. Netafim Techline CV: 0.4 GPH 1 cycle of 56 minutes; 0.6 GPH 1 cycle of 26 minutes.

April

April

Days: Advisory only, no required day count. Spray heads: turfgrass 3 days, drought tolerant 2 days. Rain Bird XFD 2 days. Netafim Techline CV 2 days. Seasonal percent option 70%.

Hours: None published by IRWD.

Run-time limits: Spray heads: turfgrass 2 cycles of 4 minutes; drought tolerant 2 cycles of 4 minutes. Rain Bird XFD: 0.6 GPH 1 cycle of 47 minutes; 0.9 GPH 1 cycle of 21 minutes. Netafim Techline CV: 0.4 GPH 1 cycle of 67 minutes; 0.6 GPH 1 cycle of 31 minutes.

May

May

Days: Advisory only, no required day count. Spray heads: turfgrass 3 days, drought tolerant 2 days. Rain Bird XFD 2 days. Netafim Techline CV 2 days. Seasonal percent option 80%.

Hours: None published by IRWD.

Run-time limits: Spray heads: turfgrass 3 cycles of 3 minutes; drought tolerant 3 cycles of 3 minutes. Rain Bird XFD: 0.6 GPH 1 cycle of 56 minutes; 0.9 GPH 1 cycle of 25 minutes. Netafim Techline CV: 0.4 GPH 1 cycle of 81 minutes; 0.6 GPH 1 cycle of 37 minutes.

June

June

Days: Advisory only, no required day count. Spray heads: turfgrass 3 days, drought tolerant 2 days. Rain Bird XFD 3 days. Netafim Techline CV 3 days. Seasonal percent option 90% on the spray chart and 100% on both drip charts, as printed.

Hours: None published by IRWD.

Run-time limits: Spray heads: turfgrass 2 cycles of 5 minutes; drought tolerant 3 cycles of 3 minutes. Rain Bird XFD: 0.6 GPH 1 cycle of 37 minutes; 0.9 GPH 1 cycle of 16 minutes. Netafim Techline CV: 0.4 GPH 1 cycle of 53 minutes; 0.6 GPH 1 cycle of 24 minutes.

July

July

Days: Advisory only, no required day count. Spray heads: turfgrass 4 days, drought tolerant 2 days. Rain Bird XFD 3 days. Netafim Techline CV 3 days. Seasonal percent option 100%.

Hours: None published by IRWD.

Run-time limits: Spray heads: turfgrass 3 cycles of 3 minutes; drought tolerant 3 cycles of 4 minutes. IRWD's own renderings split on that drought tolerant cell: the watering guide table and the Spanish page of the Spray Head Irrigation Schedule PDF (REV082123) both print 3 cycles of 4 minutes, while the English page of the same PDF prints 2 cycles of 4 minutes, which would place July below both June and August in the same column. Two of three renderings and the seasonal trend support 3 cycles. Rain Bird XFD: 0.6 GPH 1 cycle of 38 minutes; 0.9 GPH 1 cycle of 17 minutes. Netafim Techline CV: 0.4 GPH 1 cycle of 55 minutes; 0.6 GPH 1 cycle of 25 minutes.

August

August

Days: Advisory only, no required day count. Spray heads: turfgrass 4 days, drought tolerant 2 days. Rain Bird XFD 3 days. Netafim Techline CV 3 days. Seasonal percent option 100%.

Hours: None published by IRWD.

Run-time limits: Spray heads: turfgrass 3 cycles of 3 minutes; drought tolerant 3 cycles of 4 minutes. Rain Bird XFD: 0.6 GPH 1 cycle of 39 minutes; 0.9 GPH 1 cycle of 17 minutes. Netafim Techline CV: 0.4 GPH 1 cycle of 56 minutes; 0.6 GPH 1 cycle of 26 minutes.

September

September (marked with an asterisk on all three IRWD charts)

Days: Advisory only, no required day count. Spray heads: turfgrass 4 days, drought tolerant 2 days. Rain Bird XFD 2 days. Netafim Techline CV 2 days. Seasonal percent option 70%. IRWD footnote: "In September, plants' water needs drop by approximately 30 percent even if the temperature is hotter, because the days are shorter, so evaporation decreases."

Hours: None published by IRWD.

Run-time limits: Spray heads: turfgrass 2 cycles of 3 minutes; drought tolerant 2 cycles of 4 minutes. Rain Bird XFD: 0.6 GPH 1 cycle of 48 minutes; 0.9 GPH 1 cycle of 22 minutes. The 22 minute figure is what IRWD's own Drip Irrigation Schedule PDF (REV110723) prints; the HTML table on the watering guide page shows 2 minutes, a dropped digit. Netafim Techline CV: 0.4 GPH 1 cycle of 69 minutes; 0.6 GPH 1 cycle of 32 minutes.

October

October (marked with an asterisk on all three IRWD charts)

Days: Advisory only, no required day count. Spray heads: turfgrass 3 days, drought tolerant 2 days. Rain Bird XFD 2 days. Netafim Techline CV 2 days. Seasonal percent option 50%.

Hours: None published by IRWD.

Run-time limits: Spray heads: turfgrass 2 cycles of 3 minutes; drought tolerant 2 cycles of 3 minutes. The 2 cycle figure is what IRWD's Spray Head Irrigation Schedule PDF (REV082123) prints on both its English and Spanish pages; only the HTML table on the watering guide page shows 3 cycles. Rain Bird XFD: 0.6 GPH 1 cycle of 27 minutes; 0.9 GPH 1 cycle of 16 minutes. Netafim Techline CV: 0.4 GPH 1 cycle of 52 minutes; 0.6 GPH 1 cycle of 24 minutes.

November

November (marked with an asterisk on all three IRWD charts)

Days: Advisory only, no required day count. Spray heads: turfgrass 2 days, drought tolerant 1 day. Rain Bird XFD 1 day. Netafim Techline CV 1 day. Seasonal percent option 40%.

Hours: None published by IRWD.

Run-time limits: Spray heads: turfgrass 2 cycles of 3 minutes; drought tolerant 2 cycles of 4 minutes. Rain Bird XFD: 0.6 GPH 1 cycle of 54 minutes; 0.9 GPH 1 cycle of 24 minutes. Netafim Techline CV: 0.4 GPH 1 cycle of 78 minutes; 0.6 GPH 1 cycle of 36 minutes.

December

December

Days: Advisory only, no required day count. Spray heads: turfgrass 2 days, drought tolerant 1 day. Rain Bird XFD 1 day. Netafim Techline CV 1 day. Seasonal percent option 30%.

Hours: None published by IRWD.

Run-time limits: Spray heads: turfgrass 2 cycles of 2 minutes; drought tolerant 2 cycles of 3 minutes. Rain Bird XFD: 0.6 GPH 1 cycle of 44 minutes; 0.9 GPH 1 cycle of 20 minutes. Netafim Techline CV: 0.4 GPH 1 cycle of 63 minutes; 0.6 GPH 1 cycle of 29 minutes.

Exceptions and standing rules

  • Gutter flooding ban applies only where the escape of water "can reasonably be prevented" (Rules and Regulations 15.4.1(1)).
  • Washing hard or paved surfaces is prohibited "except when necessary to alleviate safety or sanitary hazards" (15.4.1(3)).
  • Potable water in a fountain or decorative feature is prohibited "except where the water is recirculated, or recirculation would cause a public health safety or sanitary hazard" (15.4.1(6)).
  • Irrigating ornamental turf on public street medians with potable water is barred only "during a declared shortage or pursuant to any regulation adopted by the State Water Resources Control Board" (15.4.1(8)).
  • Nonfunctional turf phase-out carve-out: "the use of potable water is not prohibited to the extent necessary to ensure the health of trees and perennial non-turf plants or as necessary to address an immediate health and safety need" (15.4.1(11)).
  • General Manager exemption from any permanent prohibition or shortage restriction on a finding that enforcement "would either (1) cause an unnecessary and undue hardship to the applicant or the public, or (2) would cause or threaten an emergency condition affecting the health, sanitation, fire protection, or safety of the applicant or the public" (15.3.1). The General Manager can require the use of any water conservation devices or practices as a condition of the exemption permit (15.3.2).
  • Water budget variances under Rules Section 12.7, "Variance from Residential Rate Structure Budgets; Nonresidential Acreage and Base Index Revisions", with 12.7.1 Residential Variance - Procedure and 12.7.2 Residential Variance - Determination. The grounds listed in 12.7.2(1) are number of people residing in a dwelling unit, medical needs, licensed care facilities, fire control zones (or other regulatory requirements), landscape area, livestock and horses, common area washing machines, and other as determined case by case. Note that Rule 15.3.3 still cross-references "Section 12.6" for variance procedures, but 12.6 is Time and Manner of Payment, so 12.7 governs. Applications go through IRWD's Request a Water Variance form. Categories and thresholds printed there: Additional Household Members (detached home with more than 4 permanent residents; condo attached or detached with more than 3; apartment with more than 2), Additional Landscape Area (detached home more than 1,300 square feet; condo attached or detached more than 435 square feet, with landscape drawings showing irrigated square footage and hardscape excluded), Medical Needs (doctor's note stating the condition requires additional water usage), Licensed Care Facility operating in a residential dwelling (copy of the business license), Livestock or Horses (list of the type and quantity, with a possible site visit), and Other Reasons by calling Customer Service at 949-453-5300.
  • Homeowner association protection carried in the 2025 WSCP: "Common interest associations shall not fine or assess owners of separate interests for reducing or eliminating the watering of vegetation or lawns unless the association uses only recycled water for irrigation of the association's common areas and recycled water is also available at the irrigated area of the separate interest."
  • No drip, hand watering, new planting, edible garden, potted plant, hot day or smart controller exception is printed by IRWD, because there is no watering day limit or watering hour limit that would need one. The only outdoor timing prohibition is the rain rule in 15.4.1(7): "No person shall apply potable water to outdoor landscapes during and within 48 hours of measurable rainfall."

Fines and enforcement

  1. Step 1: written preliminary notice of violation describing the violation, with 24 hours to correct the violation or terminate the use (Rules and Regulations 15.6.2(2)).
  2. Step 2 if not corrected, at the General Manager's election: (a) disconnect service, (b) install flow-restricting devices restricting non-health and safety related water service, or (c) order issued a second preliminary notice (15.6.2(2)(a) to (c)).
  3. Step 3: service disconnected or restricted is "restored only upon payment of the turn-on and other charges fixed by the Board of Directors" (15.6.2(3)). IRWD publishes no flat first, second and third offense dollar ladder.
  4. Court penalty, general: "Pursuant to Water Code Section 35424, any violation of these Rules and Regulations is a misdemeanor, the violation of which shall, upon conviction, be subject to a fine of not less than $50.00 nor more than $200.00" (14.1.3).
  5. Court penalty, conservation program: "Pursuant to Water Code Section 377, any violation of Section 15 is a misdemeanor punishable by imprisonment in the County Jail for not more than 30 days or by fine of not more than $1,000, and a violator may also be held civilly liable in an amount not to exceed $10,000" (14.1.3).
  6. During a declared shortage only: once an ordinance or resolution implementing restrictions or mandatory measures under the Water Shortage Contingency Plan is published or posted, "violations thereof shall be misdemeanors punishable by imprisonment in the County Jail for not more than 30 days or by fine of not more than $1,000, or both" (15.6.2(5)).
  7. Everyday financial consequence is the budget-based tiered rate, not a citation. Residential potable rates effective July 1, 2026 per CCF (1 CCF = 748 gallons): Tier 1 Low Volume, 0 to 40 percent of the monthly budget, $2.18; Tier 2 Base, 41 to 100 percent, $2.92; Tier 3 Inefficient, 101 to 140 percent, $8.03; Tier 4 Wasteful, 141 percent and above, $19.32. Section 6 of the 2025 WSCP calls this "An excess use charge based upon the budget-based rate structure, which is always in effect."

Report water waste: IRWD's Log-a-Leak tool at IRWD.com/logaleak, an online form where the reporter drops a map pin on the broken sprinkler, leak or runoff. IRWD's own article says "Just go to IRWD.com/logaleak and pin the location" and "Once you hit send, IRWD will contact the responsible person to get the problem fixed." It is meant for water waste the reporter spots elsewhere in the neighborhood, including someone else's home, HOA common areas and businesses. For a leak on the reporter's own property the article says there is no need to fill out the form, and directs the customer to contact IRWD instead. Customer Service and the 24-hour line is 949-453-5300; email [email protected].

Is this your water supplier?

Address matters more than city name here: Tustin addresses receive water "from either the Tustin Water Service or the Irvine Ranch Water District (IRWD) depending on where the customer resides", Mesa Water District covers "most of Costa Mesa, a portion of Newport Beach, and John Wayne Airport", and the remaining parts of Lake Forest, Orange, Newport Beach and the nearby south county cities sit with other retailers such as El Toro Water District, Serrano Water District, Trabuco Canyon Water District, Santa Margarita Water District and the cities of Newport Beach, Orange and Santa Ana, each of which sets its own rules.

Questions people ask

What days can I water in Irvine?
Any day. IRWD assigns no watering days to Irvine addresses: no odd/even rule, no assigned weekdays, and no days-per-week cap. Its monthly guide does suggest day counts, such as 3 days for turfgrass spray heads in May, but that is advice rather than a schedule anyone enforces. The charts do not even agree with each other in every month: in June, the spray chart shows 2 days for drought tolerant plants while both drip charts show 3 days.
What hours can sprinklers run in Irvine?
There is no time-of-day restriction. IRWD publishes no start time, no stop time and no time-of-day window on its watering guide, on its schedule PDFs or in its Rules and Regulations. The only outdoor timing prohibition IRWD prints is the rain rule in Rule 15.4.1(7).
What is actually banned year-round?
The prohibitions in Rules 15.4.1 are in effect at all times, whether or not a shortage is declared. They cover gutter flooding, unrepaired leaks, washing hard or paved surfaces, waste generally, washing a motor vehicle with a hose not fitted with a shut-off nozzle, potable water in a non-recirculating fountain, watering during and within 48 hours of measurable rainfall, single pass cooling, commercial car wash recirculation, and the nonfunctional turf phase-out. The phase-out dates in 15.4.1(11) matter most to commercial and HOA readers: publicly owned landscapes after January 1, 2027, commercial, industrial and institutional owned landscapes after January 1, 2028, homeowners association common area landscapes after January 1, 2029, and publicly owned landscapes within disadvantaged communities after January 1, 2031 or upon the date state funding for turf conversion becomes available.
Can I water after it rains?
Not for two days. Rule 15.4.1(7) reads: "No person shall apply potable water to outdoor landscapes during and within 48 hours of measurable rainfall." This is a permanent prohibition rather than a drought measure, and it is the one outdoor timing rule IRWD publishes.
What is exempt from the IRWD rules?
Several carve-outs sit inside the rules themselves. The gutter flooding ban applies only where the escape of water can reasonably be prevented, washing hard or paved surfaces is permitted when necessary to alleviate safety or sanitary hazards, a fountain is permitted where the water is recirculated or where recirculation would cause a public health safety or sanitary hazard, and the turf phase-out does not prohibit potable water to the extent necessary to ensure the health of trees and perennial non-turf plants or to address an immediate health and safety need. The General Manager can also grant an exemption under Rule 15.3.1 on a finding that enforcement would either cause an unnecessary and undue hardship to the applicant or the public, or would cause or threaten an emergency condition affecting the health, sanitation, fire protection, or safety of the applicant or the public, and can require water conservation devices or practices as a condition of the exemption permit.
What is the fine for water waste in Irvine?
IRWD publishes no flat first, second and third offense dollar ladder. Enforcement starts with a written preliminary notice of violation describing the violation, with 24 hours to correct the violation or terminate the use. If it is not corrected, the General Manager can elect to disconnect service, install flow-restricting devices restricting non-health and safety related water service, or order a second preliminary notice, and service that has been disconnected or restricted is restored only upon payment of the turn-on and other charges fixed by the Board of Directors. Rule 14.1.3 separately notes that under Water Code Section 35424 a violation of the Rules and Regulations is a misdemeanor subject on conviction to a fine of not less than $50.00 nor more than $200.00, and that under Water Code Section 377 a violation of Section 15 is a misdemeanor punishable by imprisonment in the County Jail for not more than 30 days or by fine of not more than $1,000, with civil liability in an amount not to exceed $10,000. Those amounts come from a court on conviction, not from a citation mailed by IRWD.
How does IRWD charge me for using too much water?
Through budget-based tiered rates rather than a citation, and that is the consequence most households actually see. Residential potable rates effective July 1, 2026 per CCF, where 1 CCF = 748 gallons, are $2.18 for Tier 1 Low Volume at 0 to 40 percent of the monthly budget, $2.92 for Tier 2 Base at 41 to 100 percent, $8.03 for Tier 3 Inefficient at 101 to 140 percent, and $19.32 for Tier 4 Wasteful at 141 percent and above. Section 6 of the 2025 Water Shortage Contingency Plan calls this an excess use charge based upon the budget-based rate structure, which is always in effect. Households with more residents, a larger landscape area, medical needs, a licensed care facility, or livestock and horses can apply for a water budget variance through IRWD's Request a Water Variance form.
My address is near Irvine but my bill is not from IRWD. Whose rules apply?
Address matters more than city name here. IRWD serves all of the city of Irvine plus parts of Lake Forest, Newport Beach, Tustin, Costa Mesa, Orange and unincorporated Orange County, so several neighboring cities are split between two suppliers. Tustin addresses receive water from either the Tustin Water Service or the Irvine Ranch Water District depending on where the customer resides, Mesa Water District covers most of Costa Mesa, a portion of Newport Beach and John Wayne Airport, and the remaining parts of Lake Forest, Orange and Newport Beach sit with other retailers such as El Toro Water District, Serrano Water District, Trabuco Canyon Water District, Santa Margarita Water District and the cities of Newport Beach, Orange and Santa Ana. Each of those sets its own rules, so check the supplier named on your water bill.
How do I report water waste to IRWD?
Use IRWD's Log-a-Leak tool at IRWD.com/logaleak, an online form where the reporter drops a map pin on the broken sprinkler, leak or runoff. IRWD's own article says "Just go to IRWD.com/logaleak and pin the location" and "Once you hit send, IRWD will contact the responsible person to get the problem fixed." It is meant for water waste spotted elsewhere in the neighborhood, including someone else's home, HOA common areas and businesses. For a leak on your own property there is no need to fill out the form; contact Customer Service instead on the 24-hour line at 949-453-5300 or at [email protected].

Sources

WateringTimes is an informational gardening and landscape reference for California. Watering numbers are estimates computed from public state data. Nothing on this site is regulatory or professional advice of any kind. Check your water supplier’s current rules before relying on any schedule.