OPINION
OVERVIEW
San Francisco BayKeeper, an environmental group, filed this action under the Clean Water Act (“CWA”), 33 U.S.C. § 1365(b), seeking a declaration that the State of California had failed to implement an adequate water pollution control program and failed to establish total maximum daily loads (“TMDL”) of pollutants which could be introduced into polluted waters. BayKeeper contended that California was years behind in implementing a TMDL program, and consequently the U.S. Environmental Protection Agency (“EPA”) had a non-discretionary duty to establish water pollution standards for California because the State had failed to make the required submissions. Bay-Keeper appeals the district court’s dismissal of this claim on partial summary judgment, certified pursuant to Fed. R.Civ.P. 54(b). BayKeeper also challenges the district court’s reliance on the EPA’s Program Review document. We affirm.
I. BACKGROUND
A. Statutory Background
In 1972, Congress passed the Clean Water Act (“CWA” or “Act”) to “restore and maintain the chemical, physical, and biological integrity of the Nation’s waters.” 33 U.S.C. § 1251. In order to attain this objective, Congress sought to eliminate the discharge of pollutants into the navigable waters by 1985. Id.
The Act focuses on two possible sources of pollution: point sources and nonpoint sources. Congress dealt with the problem of point source pollution using the National Pollution Discharge Elimination System (“NPDES”) permit process. Under this approach, compliance rests on technology-based controls that limit, the discharge of pollutants from any point source into certain waters unless that discharge complies with the Act’s specific requirements. 33 U.S.C. §§ 1311(a), 1362(12).
When the NPDES system fails to adequately clean up certain rivers, streams or smaller water segments, the Act requires use of a water-quality based approach. States are required to identify such waters, which are to be designated as “water quality limited segments” (“WQLS”). The *767states must then rank these waters in order of priority, and based on that ranking, calculate levels of permissible pollution called “total maximum daily loads” or “TMDLs.” 33 U.S.C. §§ 1313(d)(1)(A), (C). TMDLs are the maximum quantity of a pollutant the water body can receive on a daily basis without violating the water quality standard. The TMDL calculations are to ensure that the cumulative impacts of multiple point source discharges and nonpoint source pollution are accounted for. States may then institute whatever additional cleanup actions are necessary, which can include further controls on point and nonpoint pollution sources.
Under the Act, states are required to submit lists of WQLSs and TMDLs to the EPA at certain times; the first such submission was due by June 26, 1979. Sec. 303(d), 33 U.S.C. § 1313(d)(2).1 Once a state makes the required submission, certain mandatory duties by EPA are triggered. Within 30 days, EPA must review the state’s submissions. If approved by EPA, the submissions are incorporated by the state into its continuing planning process established under § 1313(e)(3). If EPA does not approve the submission, however, the EPA has 30 days after disapproval to make its own identification of waters and establish TMDLs necessary to implement the applicable water quality standards. 33 U.S.C. § 1313(d)(2). The Act is silent as to the nature of EPA’s obligations if a state, such as California here, fails to make any initial submission at all.
B. California’s TMDL Program
As this is a review of summary judgment, we must construe the facts in the light most favorable to BayKeeper, the non-moving party in this case. BayKeeper contends that California did not submit any TMDLs until 1994, which was over 15 years after the initial deadline for making a submission pursuant to § 303(d) of the Act.
Since that time, however, California has dedicated substantial resources to the development of its TMDL program. According to the May 2000 report of the EPA on California’s TMDL Program Review, the state has completed more than 46 TMDLs for waters on California’s lists. In addition, the report demonstrates that California has established a schedule for completing all TMDLs for waters on its 1998 § 303(d) lists within the next 12 years. Finally, the state has dedicated substantial resources to its TMDL program, allotting $7 million annually to TMDL funding.
II. STANDARDS OF REVIEW
This Court reviews a grant of summary judgment de novo. Weiner v. San Diego County, 210 F.3d 1025, 1028 (9th Cir.2000). We must determine, viewing the evidence in the light most favorable to the nonmoving party, whether there are any genuine issues of material fact and whether the district court correctly applied the relevant substantive law. Far Out Prods., Inc. v. Oskar, 247 F.3d 986, 992 (9th Cir.2001). This Court reviews a district court’s decision to consider a particular piece of evidence for abuse of discretion. Northcoast Envtl. Ctr. v. Glickman, 136 F.3d 660, 665 (9th Cir.1998).
III. DISCUSSION
A. Clean Water Act
BayKeeper argues that California’s failings under the CWA have triggered a duty on the part of the EPA to establish *768TMDLs for the entire state. In order to prevail on this claim, BayKeeper must prove that EPA has a nondiscretionary duty to establish TMDLs for the State of California. See 33 U.S.C. § 1365(a)(2) (limiting citizen-suits against EPA to suits alleging EPA has failed to perform a duty “which is not discretionary”). In attempting to prove such a duty, BayKeeper relies upon § 303(d) of the CWA. That section reads as follows:
Each State shall submit to the Administrator from time to time, with the first such submission not later than one hundred and eighty days after the date of publication of the first identification of pollutants under section 1314(a)(2)(D) of this title, for his approval the waters identified and the loads established under paragraphs (1)(A), (1)(B), (1)(C), and (1)(D) of this subsection. The Administrator shall either approve or disapprove such identification and load not later than thirty days after the date of submission. If the Administrator approves such identification and load, such State shall incorporate them into its current plan under subsection (e) of this section. If the Administrator disapproves such identification and load, he shall not later than thirty days after the date of such disapproval identify such waters in such State and establish such loads for such waters as he determines necessary to implement the water quality standards applicable to such waters and upon such identification and establishment the State shall incorporate them into its current plan under subsection (e) of this section.
33 U.S.C. § 1313(d)(2) (emphasis added).
BayKeeper argues that EPA’s duty under this statute has been triggered by California’s failure to submit a TMDL between 1980 and 1994. We find this argument unpersuasive.
The district court, in construing § 303(d) of the CWA, noted that the statute only requires the EPA to act if it disapproves of a state’s TMDL submission. BayKeeper, however, argues that this same duty is also invoked when a state either fails to submit or submits an inadequate TMDL listing. Although not a novel issue, it is one that nonetheless has received little attention within this Court. However, we note that other courts faced with this same issue have dealt with it using what has been termed the “constructive submission” doctrine. Under this doctrine, a complete failure by a state to submit TMDLs will be construed as a constructive submission of no TMDLs, which in turn triggers the EPA’s nondiscretion-ary duty to act.
The first case to employ this doctrine was the Seventh Circuit’s decision in Scott v. City of Hammond, 741 F.2d 992 (7th Cir.1984). Scott was a citizen-suit against the EPA for failure to prescribe TMDLs for pollutants discharged into Lake Michigan, after Illinois and Indiana had failed to do so. Id. at 996-97. Because of the lengthy absence of any state submissions, the Seventh Circuit concluded that the EPA had an affirmative duty to treat the states’ inactions as a “constructive submission,” warranting the EPA’s response under § 303(d)(2). Id. The court held,
We believe that, if a state fails over a long period of time to submit proposed TMDL’s, this prolonged failure may amount to the “constructive submission” by that state of no TMDL’s. Our view of the ease is quite simple, and tracks the statutory scheme set up by Congress .... The allegation of the complaint that no TMDL’s are in place, coupled with the EPA’s admission that the states have not made their submissions, raises the possibility that the states have determined that TMDL’s for Lake *769Michigan are unnecessary.... [T]hen the EPA would be under a duty to either approve or disapprove the “submission.”
Id.
The Scott court also reasoned that
We cannot allow the states’ refusal to act to defeat the intent of Congress that TMDL’s be established promptly — in accordance with the timetable provided in the statute. In addition, to construe the relevant statute [any other way] would apparently render it wholly ineffective. There is, of course, a strong presumption against such a construction.
Id. at 998. However, the Scott court ultimately remanded the case to the district court instructing it “to proceed as if the states had submitted proposals of no TMDL’s unless [there is] evidence indicating that the states are, or will soon be, in the process of submitting TMDL proposals.” Id. at 997, n. 11.
In the present case, the district court interpreted Scott to stand for the proposition that the constructive submission doctrine is viable only when “the state fails to submit any TMDLs and has no plans to remedy this situation.” Because California had submitted some TMDLs between 1994 and the present, the district court held that the constructive submission theory did not apply.
Indeed, the district court’s ruling is consistent with how other circuits have interpreted and applied Scott. In Hayes v. Whitman, 264 F.3d 1017 (10th Cir.2001), the Tenth Circuit was confronted with a case that contained facts very similar to those in the present case. In Hayes, the court rejected the claim that Oklahoma had constructively submitted no TMDLs and thus the EPA had a nondiscretionary duty to establish TMDLs for the state. Id. at 1022-24. Oklahoma had submitted a few TMDLs (between three and twenty-nine — although the plaintiffs claimed that none of the TMDLs met all applicable regulatory requirements), and had established a schedule to complete more than 1400 TMDLs by 2010. Id. at 1022. Based on these facts, the court held that the “necessarily [ ] narrow” constructive submission theory did not apply. Id. at 1024. According to the Tenth Circuit, “[i]t applies only when the state’s actions clearly and unambiguously express a decision” not to submit TMDLs. Id. Because Oklahoma had submitted some TMDLs and was making progress on a schedule to complete its remaining TMDLs over a twelve-year period, the court could not find that the state had decided not to submit TMDLs. Id.; See also Natural Resources Defense Council, Inc. v. Fox (“NRDC III”), 93 F.Supp.2d 531, 540 (S.D.N.Y.2000) (no constructive submission because, during the pendency of the lawsuit, New York submitted some TMDLs, formulated a plan for finishing them, and “demonstrated its good-faith interest in collaborating with EPA to bring State’s TMDL program to completion”); Sierra Club, North Star Chapter v. Browner, 843 F.Supp. 1304, 1314 (D.Minn.1993) (finding that no constructive submission had occurred where Minnesota had “identified TMDLs that it believes should receive the highest priority, ... initiated work on developing those TMDLs, and [ ] implemented some TMDLs”); Idaho Sportsmen’s Coalition v. Browner, 951 F.Supp. 962, 967-68 (W.D.Wash.1996) (finding no constructive submission where Idaho had established three TMDLs and proposed a schedule for completion of additional TMDLs); Sierra Club v. Hankinson, 939 F.Supp. 865, 872 n. 6 (N.D.Ga.1996) (constructive submission theory inapplicable where state had submitted some, albeit inadequate *770TMDLs).2 Even in Scott, the first case to address this issue, the Seventh Circuit remanded the case to the district court for a determination whether the state was in the process of submitting any TMDLs even though none had been submitted up until that point. 741 F.2d at 997, n. 11.
We agree with the Tenth Circuit’s decision in Hayes. California has submitted at least eighteen TMDLs and has established a schedule for completing its remaining TMDLs. Under the constructive submission doctrine, then, these actions on the part of California preclude any finding that the state has “clearly and unambiguously” decided not to submit any TMDLs. See Hayes, 264 F.3d at 1024.
In so ruling, we make no determination on California’s past efforts and whether those efforts complied with the TMDL program. Any declaration by this Court that EPA has been in violation of the CWA in the past would only serve as an advisory opinion because there is now no present controversy over past violations for which there is a remedy. See NRDC III, 93 F.Supp.2d at 536 (“Plaintiffs did not, and could not, acquire rights by virtue of EPA’s past failings, and the Court cannot, accordingly provide any relief that goes beyond ensuring EPA’s present compliance with statutory mandates”). Accordingly, as we must look only at EPA’s present duty and whether it has been breached, we need not make a broad, generic determination of the point in time at which a state’s inaction may be deemed a constructive submission.
B. Administrative Procedures Act
Under § 706(1) of the APA, courts are authorized to “compel agency action ... unreasonably delayed.” 5 U.S.C. § 706(1). As an alternative argument, BayKeeper argues that even if this Court finds that EPA did not have a duty under the CWA, “EPA’s failure to assure the establishment of TMDLs on a timely basis nevertheless violates the APA’s duty to avoid ‘unreasonable delay.’ ” In advancing this argument, BayKeeper argues that an agency action may be unreasonably delayed even when the governing statute does not require action by a certain date. See Forest Guardians v. Babbitt, 164 F.3d 1261, 1272 (10th Cir.1998). However, for a claim of unreasonable delay to survive, the agency must have a statutory duty in the first place. See Madison-Hughes v. Shalala, 80 F.3d 1121, 1124-25 (6th Cir.1996); see also Brower v. Evans, 257 F.3d 1058, 1067-68 (9th Cir.2001) (considering claim of unreasonable delay only after concluding that Secretary of Commerce had duty to act). As the previous section discussed, EPA does not presently have a statutory duty to act. Therefore, there can be no unreasonable delay in this case. See NRDC III, 93 F.Supp.2d at 544 (“As the Court finds that EPA is not presently under a duty to declare such a ‘constructive submission,’ it is illogical, and perhaps therefore unnecessary, to consider whether EPA unreasonably delayed such a declaration”).
Accordingly, we affirm the district court’s dismissal of BayKeeper’s APA claim.
C. Program Review Document
Finally, BayKeeper contends that the district court erred in relying upon the Program Review document, which Bay-Keeper describes as a “post-hoc staff memorandum” that attempts to “inflate the scope of the State’s past and ongoing TMDL efforts in order to beef up EPA’s arguments in this action.” In support of *771this argument, BayKeeper points to Citizens to Preserve Overton Park, Inc. v. Volpe, 401 U.S. 402, 420, 91 S.Ct. 814, 28 L.Ed.2d 186 (1971), which held that “review [of an agency’s decision] is to be based on the full administrative record” that was before the agency at the time the decision was made.
BayKeeper is correct that generally judicial review of agency action is based on a set administrative record. However, when a court considers a claim that an agency has failed to act in violation of a legal obligation, “review is not limited to the record as it existed at any single point in time, because there is no final agency action to demarcate the limits of the record.” Friends of the Clearwater v. Dombeck, 222 F.3d 552, 560 (9th Cir.2000); see also Independence Min. Co., Inc. v. Babbitt, 105 F.3d 502, 511 (9th Cir.1997) (noting that when a suit challenges agency inaction, district court can consider supplemental statements of an agency position because there is no date certain by which to define the administrative record). The reason for this rule is that is when a court is asked to review agency inaction before the agency has made a final decision, there is often no official statement of the agency’s justification for its actions or inactions.
As this case concerns agency inaction, there can be no final agency action that closes the administrative record or explains the agency’s actions. Accordingly, it was not an abuse of discretion for the district court to rely upon the Program Review document.
CONCLUSION
For the foregoing reasons, the district court’s grant of summary judgment is AFFIRMED.